Develop Bugs

[SOLVED] HERM200 Buttons ko

Hi @all,
I've got a BIG problem!
without ANY reason the:
MAIL front button
Start menu front button
OK front button
Left & rigth soft key
Answ & Hangup... buttonS
do not answ.
Also the keyboard go in crazy...
1) Test
Hard resetting (L&R Soft keys and reset key) -> The phone go in reset mode, asking for R or X
2) Test
dismounting HERM200 to verify if some connector or flat cable is not ok -> everithing is on his own set...
SOME SUGGESTIONS?
Tanks a lot and best regards @ all
VulKan desperate XXV
[SOLUTION]
After a long and desperate period during while the strong chose to buy a new device... THIS MORING, WATCHING MOTO GP...
The desperate trying: Double Hard Reset.
1) Hard Reset TYTN
2) when it ask to press SPACE, Hard Reset again...
Now my tytn is OK!
[email protected]
W XDA-DEVELOPERS

UP
Desperation Level 5

Up
Desperation Level 4!

vulkanxxv said:
1) Test
Hard resetting (L&R Soft keys and reset key) -> The phone go in reset mode, asking for R or X
Click to expand...
Click to collapse
This isn't clear. Did you actually *perform* the hard reset (by pressing R)? If not, this should be your first step.

MrWee said:
This isn't clear. Did you actually *perform* the hard reset (by pressing R)? If not, this should be your first step.
Click to expand...
Click to collapse
I do not need perform the hard reset.
I do this to test the soft keys.

I've been having a similar problem, the green dial button on my phone does not work at all.
I think my problem is most likely a faulty pcb (new one on order from cnn.cn), I'll let you know if it fixes the problem.
I've tried numerous hard resets and flashes, and that did nothing to fix my problem.
But thats the least of my worries right now, my phone is plagued with the disappearing radio issue at the moment (http://forum.xda-developers.com/showthread.php?t=304364) so its of no use at all to me.
Hopefully we can figure out how to fiix this issue, let me know if you have any success.

vulkanxxv said:
I do not need perform the hard reset.
I do this to test the soft keys.
Click to expand...
Click to collapse
Actually, If they DO work to get you to the hard reset, but do NOT work when you are in the main OS, I would suggest trying a hard reset, as It seems to be a software-caused problem.

invictive said:
I've been having a similar problem, the green dial button on my phone does not work at all.
I think my problem is most likely a faulty pcb (new one on order from cnn.cn), I'll let you know if it fixes the problem.
I've tried numerous hard resets and flashes, and that did nothing to fix my problem.
But thats the least of my worries right now, my phone is plagued with the disappearing radio issue at the moment (http://forum.xda-developers.com/showthread.php?t=304364) so its of no use at all to me.
Hopefully we can figure out how to fiix this issue, let me know if you have any success.
Click to expand...
Click to collapse
I suppose that is this the reason of this buttons fault...
MrWee said:
Actually, If they DO work to get you to the hard reset, but do NOT work when you are in the main OS, I would suggest trying a hard reset, as It seems to be a software-caused problem.
Click to expand...
Click to collapse
I did it many time...
Desperation level 3

Desperation level 2

vulkanxxv said:
Hi @all,
I've got a BIG problem!
without ANY reason the:
MAIL front button
Start menu front button
OK front button
Left & rigth soft key
Answ & Hangup... buttonS
do not answ.
Click to expand...
Click to collapse
I had this problem when I first installed Black 3.0. Soft resetting made no difference. However, I simply opened my hermes hardware keyboard and closed it again and the buttons came back to life. No problem since.

revmark said:
I had this problem when I first installed Black 3.0. Soft resetting made no difference. However, I simply opened my hermes hardware keyboard and closed it again and the buttons came back to life. No problem since.
Click to expand...
Click to collapse
I will try it tomorrow!
Desperation level 1

PANIC LEVEL 5
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Nobody know other solutions?

NEWS
I've dismonted completly my Hermes... remounted and the problem persist!
Now, sometime the down button open the messages application.
If my idea is correct, the problem is exclusively software.
Im going to downgrade radio.
Actually I've installed Black 3.x with 1.41.00.10

what software do you have installed. because i noticed on some today themes i would have that problem. try going to the default today theme and use sktools to do a clean function. That will get rid of any registry keys causing a conflict. hope that helps

donsaxena said:
what software do you have installed. because i noticed on some today themes i would have that problem. try going to the default today theme and use sktools to do a clean function. That will get rid of any registry keys causing a conflict. hope that helps
Click to expand...
Click to collapse
I use some simple SW.
EZDial
Phonepad international
TomTom 6.10
PSShutxp
Batti.2.1
SMS Treaded
Next news
After radio downgrading -> Buttons dead
Black 3.x to LVSW 3.30.0.9 -> Buttons dead
LVSW 3.30.0.9 to LVSW 3.30.01 Full -> Buttons dead
Now, exist a method to hard hard hard reset the hermes?
Unbriking method is valid?

Busted keys
I have the same issue. I am sure it's not software- have flashed a different ROM etc, removed the battery, and other things with no result. I have a feeling it's a hw issue- the buttons suddenly came to life, but after keeping the phone in my hot&sweaty jeans pocket during a hot day, they stopped working again. I've also noticed several people complain about this issue. I will try to get it fixed on warranty. I'd be interested to know if anyone else suspects MOISTURE as a possible cause???

LazPL said:
the buttons suddenly came to life, but after keeping the phone in my hot&sweaty jeans pocket during a hot day
Click to expand...
Click to collapse
I live in Sicily... here we have ALL hot days!
But i've the same idea. Later i try to dry the phone using a phon (hairdryer in Italy)...
LazPL said:
they stopped working again. I've also noticed several people complain about this issue. I will try to get it fixed on warranty. I'd be interested to know if anyone else suspects MOISTURE as a possible cause???
Click to expand...
Click to collapse
About the moisture, i do not belive that is technically possible.

vulkanxxv said:
About the moisture, i do not belive that is technically possible.
Click to expand...
Click to collapse
Hm. Perhaps not. As far as moisture goes, it COULD have such an effect, corroding contacts or if applied to the PCB, create currents where there shouldn't be any. But in any case it seems to be hardware related. I am really angry about this because I really like the phone otherwise... Now it's nearly unusable. Maybe its just the circuit board that is poorly done.
I was in Sicily last summer. Beautiful.

revmark said:
I had this problem when I first installed Black 3.0. Soft resetting made no difference. However, I simply opened my hermes hardware keyboard and closed it again and the buttons came back to life. No problem since.
Click to expand...
Click to collapse
Revmark, when you say you opened the keyboard, what do you mean? Do you mean you slid out the keyboard, and closed it? Or do you mean you took the Herm apart?
Laz

The story of me and my HTC Desire

After some negotiating with my girlfriend I decided I’d buy an Android phone, an HTC Desire from PDAShop.be, where I’ve bought my previous HTC Touch 3G.
As always, the delivery of the phone was quick and soon I unpacked the phone and started playing around with it. I improrted contacts from SIM to phone and linked them to Facebook and Twitter contacts. Piece of pie. I also installed some apps and games from the Android Market (no paid apps here in Belgium, yet) and fiddled around with them, as I also did with various settings in the HTC Sense UI.
After a few hours playing with the phone, I went outside with the phone in my back pocket of my jeans, and I heard the HTC startup again. I thought that somehow I managed to press the power button by accident. Nope, the phone restarted several times on different occasions.
When I went to sleep, the phone was on and the battery was almost charged to 60%. The next morning, 8 hours later, the device was turned off and when I charged it via USB on the PC, the battery was fully drained… 0%!
I then called HTC support, and the kind person on the other end of the line listened to my story and told me I needed a hard-reset of the device. From the mail he sent me:
With the phone turned off, press and hold the VOLUME DOWN button, and then briefly press the POWER button. 2. Wait for the screen with the 3 Android images to appear, and then release the VOLUME DOWN button. 3. Press VOLUME DOWN to select CLEAR STORAGE, and then press POWER. 4. When asked to confirm, press VOLUME UP
Click to expand...
Click to collapse
I tried that, but the phone just wouldn’t complete the hard-reset. So I called PDAShop and they told me that I could bring the phone in. I removed my SIM from Mobile Vikings and put it in my other phone and drove to them.
To my amazement the guy at the shop managed to hard-reset (without a SIM) the device, and stress-tested it with some rapid movements, changing styles in the UI, setting up a Live-wallpaper. The device didn’t freeze… So I drove back to home.
I put my SIM back in, and voila… the device started to hang on me again. I even tried the hard-reset with the SIM with no luck whatsoever. I contacted PDAShop again and the same person helped me further. He said I can send the phone back to them and they will replace it with a new one…
I really hope this isn’t becoming some part of long tragedy waiting to happen. I really want to enjoy this Android phone, as I am fed up with the current status of Windows Mobile on my brilliant HTC Touch 3G.

Hey
Sorry to heard your story, you must be very unlucky :/ . If it's of any comfort, my desire has a mobile vikings sim in it aswell and functions excellent, so it's probably a faulty model.

Sorry for you, it's probably a faulty device or a faulty ROM, either way, my phone and the ones of multiple other person works fine so keep hope!

I would advise you to recontact Coolbleu (aka pdashop) and tell them that you went there they did reset it and tested it but that it didn't fix the problem. I would be surprised if they wouldn't offer to give u a new one. (I bought several phones at coolbleu and I've always been happy with after sale support) BTW I'm also using Mobile Vikings (but on HTC Legend) and I don't have any problems with it at all.

@JonasDroid & @Cooki3s:
Good to know that, because the person at coolblue received some disturbing calls from people with MobileVikings SIM cards. How old are your SIM cards?
@All Thanks for the support, I really hope my next Desire will be somthing that I can actually enjoy
Will keep you posted.
Cheers!

I tried a hard reset again, but without a SIM and SD card inserted. This seemed to work.
I then did go through all the settings in the wizard and rebooted. Then I shut it down, inserted to SD again and I went into Settings > SD and Storage, unmounted the card, formatted it, and rebooted the phone. I stress-tested it for a while, and then I shut it down, inserted my SIM and it still works.
Could it be that some corrupt data on the card caused the instant reboots and faulty hard-resets?
I'm going to charge my phone and test it throughout the day to see if it still hangs/reboots on its own. Fingers crossed!
EDIT:
I spoke too soon... a few minutes later and the device was shut down when I tried to bring the screen back up. Now it reboots until it hangs itself... I don't hear the startup-sound either when it come to "Quitely Brilliant"
The phone will be sent back to pdashop!
Edit2:
I narrowed the problem down to a device-specific issue... It shuts down/freezes/reboots randomly even when no SIM and no SD card are in the device... I really hope the next device I'll receive doesn't have these issues

Have you got any apps installed on it? If so what? I had issues with some apps that changed the APN when the internet wasnt being used.

its a faulty device

langers1 said:
Have you got any apps installed on it? If so what? I had issues with some apps that changed the APN when the internet wasnt being used.
Click to expand...
Click to collapse
No external apps installed since first hard reset
dexteral said:
its a faulty device
Click to expand...
Click to collapse
That's what I thought also

Hey,
My SIM dates from early January this year.

I love my desire
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I bought it unlocked no problems.

jimlad said:
I love my desire
I bought it unlocked no problems.
Click to expand...
Click to collapse
Very usefull and mature. We all thank you for enlightening us!

Power Button not working all of a sudden

Hello. I posted something in the ICS thread since I thought it was an ICS issue but... it seems the power button in my 4G Touch has suddenly stopped working. The phone rebooted randomly and then the key just won't register. It doesn't go to sleep, or turn back on or anything. Heck, I even did a factory reset (its a stock ICS) to see if that resolved the issue and no... No go. The button click so it doesn't feel like its broken or anything, though it has a good cover.
What could have happened? Is it ICS related or did it just... stop working? =/

i had the same problem with my og epic....the button was clicking but it wasnt working...took the phone to sprint and they replaced the phone...i guess it was from too much flashing...lol...after that i started using quickboot...
Sent from my SPH-D710 using Tapatalk

Literally just had this issue. I thought it was from AOKP, but turns out it was just hardware. Sprint couldn't fix it for me so had to get a replacement. The button was just broken on the inside.
Sent from my SPH-D710 using xda app-developers app

I just had this issue today actually. The button wouldn't register any presses and my phone kept turning off. Couldn't lock the screen.
Sent from my Nexus 7 using xda app-developers app

Common problem with this phone. The one year warranty, which everyone is still covered under, covers it. Take it into a sprint corporate store for help.
Sent from my SPH-D710 using Tapatalk 2

Same problem here, I plan to take it into a sprint store for repair/replacement and I want to unroot my phone and revert it to a stock rom before hand but I need the power button to do so...heh... any ideas? Thanks!

Power Button Not Working SGS4 Not Sleeping SOLVED
OMG I was at my wits end with this brand new phone. Power button worked fine but would NOT put the phone to sleep. Nor would the phone sleep on its own. Wakelock checkers revealed nothing. Then, by pure luck, I did something with the Android SDK which brought up the logs... and Lo! and Behold! I saw this:
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Now putting aside the fact that it was "Finding out whether" not "Checking if," this told me what was up.
What had happened was that I had deleted the boot animation files and not replaced them. I THOUGHT I had replaced them, but I had not. Ergo the constant checking thereof.

BaileyJ205 said:
Same problem here, I plan to take it into a sprint store for repair/replacement and I want to unroot my phone and revert it to a stock rom before hand but I need the power button to do so...heh... any ideas? Thanks!
Click to expand...
Click to collapse
Use Rebooter (Free in Play Store) to get into Download Mode (Bootloader)
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Steev43230 said:
OMG I was at my wits end with this brand new phone. Power button worked fine but would NOT put the phone to sleep. Nor would the phone sleep on its own. Wakelock checkers revealed nothing. Then, by pure luck, I did something with the Android SDK which brought up the logs... and Lo! and Behold! I saw this:
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Power Manager Service: Check if boot animation finished
Now putting aside the fact that it was "Finding out whether" not "Checking if," this told me what was up.
What had happened was that I had deleted the boot animation files and not replaced them. I THOUGHT I had replaced them, but I had not. Ergo the constant checking thereof.
Click to expand...
Click to collapse
SGS4? We talking the device or the ROM? You can also delete the boot animation from the /system/media folder and it will just use the stock Samsung boot animation buried in the ROM's code, my guess is you've got more going on than you think you do. You might want to take a look at this thread to see just what's up.
(Yes, shameless self-plug...)

Stryke_the_Orc said:
SGS4? We talking the device or the ROM?
Click to expand...
Click to collapse
The device would not sleep or turn off the screen because the boot animation files were missing (which was my fault).

Please Help Safe Mode Not Getting Disable !

Hey Guys ! Please Help Me !
My Phone Was Dropped And The Screen Got Cracked !
Then I Had A Replacement Of The Screen !
After The Screen Got Repair , There Is A Safe Mode Showing At Bottom Of The Screen !
Is There Any Way To Disable It ?
Please Help People !! Please..

MATHReX said:
Hey Guys ! Please Help Me !
My Phone Was Dropped And The Screen Got Cracked !
Then I Had A Replacement Of The Screen !
After The Screen Got Repair , There Is A Safe Mode Showing At Bottom Of The Screen !
Is There Any Way To Disable It ?
Please Help People !! Please..
Click to expand...
Click to collapse
1.Remove battery while device is on 2.Leave battery out for 1-2 minutes. (I usually do 2 minutes to be sure)
3.Place the battery back into the phone.
4.Push in the Power button to turn on
5.Let device power on without holding any buttons as normal Once the device is on the home screen, you should no longer see Safe mode. Hope this helps, good luck.

kenxda33 said:
1.Remove battery while device is on 2.Leave battery out for 1-2 minutes. (I usually do 2 minutes to be sure)
3.Place the battery back into the phone.
4.Push in the Power button to turn on
5.Let device power on without holding any buttons as normal Once the device is on the home screen, you should no longer see Safe mode. Hope this helps, good luck.
Click to expand...
Click to collapse
I have the same problem, I got stuck in safe mode after replacing my cracked screen.
I did exactly what is suggested by 'kenxda33' above
and I did the following too:
1) Factory Reset from the settings menu.
2) Wipe Partition and Reset through recovery mode,
3) Upgraded the phone to Android 4.2.2 using Odin
4) Dissembled the phone and removed the volume buttons and switched it on.
and still I have the same problem,

I have the exact same problem after replacing screen as well, did you guys find any resolution for this?

Take ur ph to the service center..they may help u..
Sent from my GT-I9082 using xda app-developers app

that happened after coming out from the SC
i want to know what was the resolution from the people who faced it

that happened after coming out from the SC
i want to know what was the resolution from the people who faced it

Hey,
I'm having the exact same issue . Wondering if you found a solution

I have the same issue, people says that our screem is not original so its the cause of the problem. But i hope someone can find the solution.

Unable to come out of safe mode after screen replacement
malshafai said:
I have the same problem, I got stuck in safe mode after replacing my cracked screen.
I did exactly what is suggested by 'kenxda33' above
and I did the following too:
1) Factory Reset from the settings menu.
2) Wipe Partition and Reset through recovery mode,
3) Upgraded the phone to Android 4.2.2 using Odin
4) Dissembled the phone and removed the volume buttons and switched it on.
and still I have the same problem,
Click to expand...
Click to collapse
---------------------------------
Hi,
Did you find any solution for this problem...
Coz i am facind the same problem...

There is nothing we can do about it?
I'm having the same problem here and i've tried everything.
I've tried kenxda33 solution and it worked... until i rebooted my phone.
I've tried wipe all, reinstall my rom, install other rom (like CM 11).
Isn't there any softmod solution for this? Like, disable safe mode for real?

Can anyone post a screenshot?
And possibly the only solution in SC. But you could try flashing with a stock untouched ROM.
Sent from my GT-I9082 using XDA Premium 4 mobile app

laurorual said:
There is nothing we can do about it?
I'm having the same problem here and i've tried everything.
I've tried kenxda33 solution and it worked... until i rebooted my phone.
I've tried wipe all, reinstall my rom, install other rom (like CM 11).
Isn't there any softmod solution for this? Like, disable safe mode for real?
Click to expand...
Click to collapse
Can you please post a screen shot of the problem..?
Sent from my GT-I9082 using XDA Premium 4 mobile app

DMJoh said:
Can anyone post a screenshot?
And possibly the only solution in SC. But you could try flashing with a stock untouched ROM.
Sent from my GT-I9082 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
SS:
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I've tried to flash stock untouched through Odin and still with the problem

laurorual said:
SS:
I've tried to flash stock untouched through Odin and still with the problem
Click to expand...
Click to collapse
And coming tohe fact, i understand you are well aware of the device and android, so am not going to explanations. So to disable safe mode, usually, keeping the battery away for a minute or two will do the job. But i guess this is not the case you have.
Just Try, Turn the phone off.Turn it back on and hold the “up” volume button.if this dont work, try holding volume up and down simultaneously whilte switching on. This is used to enable safe mode.
If u are on JB when phone is on, press the power key and hold the Power Off button on the screen for a few seconds, and see something is happening.
Unfortunately, after switching to safe-mode, a restart should disable the safe mode.

DMJoh said:
And coming tohe fact, i understand you are well aware of the device and android, so am not going to explanations. So to disable safe mode, usually, keeping the battery away for a minute or two will do the job. But i guess this is not the case you have.
Just Try, Turn the phone off.Turn it back on and hold the “up” volume button.if this dont work, try holding volume up and down simultaneously whilte switching on. This is used to enable safe mode.
If u are on JB when phone is on, press the power key and hold the Power Off button on the screen for a few seconds, and see something is happening.
Unfortunately, after switching to safe-mode, a restart should disable the safe mode.
Click to expand...
Click to collapse
still in safe mode
i'm starting to think this problem came to me after i changed the screen (it was broken)
maybe it is some HW problem?

laurorual said:
still in safe mode
i'm starting to think this problem came to me after i changed the screen (it was broken)
maybe it is some HW problem?
Click to expand...
Click to collapse
A hardware problem may not cause phone to boot in to safe mode i think. If possible.. Carry it to a service centre.

May be, it's happening because of a kind of short-circuit. Once, I also faced almost the same kind of issue. In my case, almost 2 years ago, my old smartphone (GT-S6802) was again and again going into Download Mode whenever I tried to power on the smartphone. Then I took it to the SC. And they discovered that the reason behind it was an electrical short-circuit. They worked on it, and my problem was resolved. Therefore, I'd like to suggest whoever facing such issues, to take their smartphone to the SC and your problem will surely be resolved.

Solution found at last
Solution is here
So don't worry guys anymore
It's not a big deal as some of you guys say
I had my touch replaced n had the same trouble
I simply switched it off n interchange both sims with each other (means put sim 1 into the slot of sim 2 n vice versa.)
It became OK
U can also try removing Sim 1 n letting the slot empty n using only sim2 in its slot

How to get out safe mode LG Optimus L9
MATHReX said:
Hey Guys ! Please Help Me !
My Phone Was Dropped And The Screen Got Cracked !
Then I Had A Replacement Of The Screen !
After The Screen Got Repair , There Is A Safe Mode Showing At Bottom Of The Screen !
Is There Any Way To Disable It ?
Please Help People !! Please..
Click to expand...
Click to collapse
I JUST got out of safe mode after looking and searching for several weeks. I went to TMobile Manage My Account and did backwards how they showed turning ON safe mode....1. turn off your phone. 2. turn your phone on THEN when the phone logo appears, immediately let go of power button and then hold down VOLUME UP button till screen comes on. Sheesh, I'm glad to be done with this!

MTCD unit does not start

Hello everyone, I have a PX3 unit, Android 5.1.1 and MTCD_KD_V1.82_1 MCU version. It is car-specific (Suzuki Swift 2007) with physical buttons on its faceplate.
Suddenly (without any software or hardware modification) it decided never to start again. Short pressing the power button does nothing at all. Short pressing the reset button flash the leds for a second, but nothing else happens and the screen remains black. Putting the reverse gear (I have a rear camera installed) does not activate the rear camera input too.
I have already tried disconnecting its power completely.
I tried to enter the recovery mode by keeping the power button pressed. After about 15 seconds the leds flash 3 times and then they stay on as long as I keep the power button pressed. I tried pressing the power button for 3 seconds right after the 3 led blinks, but I wasn't successful. I tried many times long press the power button for 15 seconds and a short press right after the 3 led blinks. No success. Anyone knows what is the procedure for entering the recovery mode on KD units? I also tried keeping the reset button pressed for long time, nothing happened. Right now that I am writing these lines (the last move I made was short pressing the reset button), it blinks the leds once every 1 minute exactly.
If I enter a cd in the disk tray, it loads it inside its mechanism, and it ejects it when I press the eject button. But nothing more. Screen always remains black.
Any ideas?

nobody?
does my problem seem to be on the SoM or mainboard?

anyone knows if I can't get in Recovery Mode, is this a problem of the MCU or the SoM ?

Hi mate, have a similar situation. Do you solve it?

Probably the problem occurs in the SOM.
If the LEDs are blinking, loading/unloading the DVD/CD means that the MCU works.

What did the reseller suggest when you contacted support?

marchnz said:
What did the reseller suggest when you contacted support?
Click to expand...
Click to collapse
Well, they suggest to make some tests. One with the reset and power button, that result doing nothing, just a buttons light blink after release. And the other is make a bridge between BATT+ and ACC on cambus female connector (without cambus connected) and try to power on, but nothing happen too.
I test voltage on terminals, harness wires, fuse.. all ok.
Was strage that after 3 days of this problem, finishing a ride, HU wake up. Day after that, dont power on anymore.
Any suggestion is welcome Marchnz. Essentially if open the chassis is needed.
Thanks in advance!
Pol

Have you tried to press buttons on the display (where they were supposed to be) in order to check if display is failed only but the unit is working?
connecting a USB with music should it open autmatically the mp3 player and so on...
I did suffere that similar situation and myunit was responsive to touch but no display.

ikerg said:
Have you tried to press buttons on the display (where they were supposed to be) in order to check if display is failed only but the unit is working?
connecting a USB with music should it open autmatically the mp3 player and so on...
I did suffere that similar situation and myunit was responsive to touch but no display.
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Click to collapse
Thanks mate, and yes, I try, but doesn't work. Is completely dead. Now Im asking me if is a electronics failure or a brick...
Thanks for your suggestion.
P

Well, tech support of reseller determine that SOM have some problem... but guess what... they cant repair it cose my MTCD 2017 is discontinued!!! jaja oh god!
They offer me to buy a new one at half price. I live in Argentina and shipping will kill me.. so, I would need some help here open the unit and check components and soldering points.. is there some caritative soul who can help me or guide me a little?
Thanks in advance!

polgoz said:
Well, tech support of reseller determine that SOM have some problem... but guess what... they cant repair it cose my MTCD 2017 is discontinued!!! jaja oh god!
They offer me to buy a new one at half price. I live in Argentina and shipping will kill me.. so, I would need some help here open the unit and check components and soldering points.. is there some caritative soul who can help me or guide me a little?
Thanks in advance!
Click to expand...
Click to collapse
Show us your board, we will show you ours =)
I have a similar problem at the moment, last week some smd component burnt because of all the heat / temperature here in germany =)

Thanks mate, here some pics of the HU opened. No melt components. no soldering fails at first view.. not changes making percusive hits over components.. Im lost...
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that looks strange for me from here =)
EDIT: ahh nevermind, i think it has circuits for a transistor or similar but may be ok, still is the soldering ok there or did it get loose?
EDIT2: what i also had, try putting pressure on the midst of the contacts of the SoM and try to turn it on, what you also can do is to apply power and put some force on the contacts from left to right to maybe find out that it turns on suddenly =)

Kayhan 17# said:
that looks strange for me from here =)
EDIT: ahh nevermind, i think it has circuits for a transistor or similar but may be ok, still is the soldering ok there or did it get loose?
EDIT2: what i also had, try putting pressure on the midst of the contacts of the SoM and try to turn it on, what you also can do is to apply power and put some force on the contacts from left to right to maybe find out that it turns on suddenly =)
Click to expand...
Click to collapse
I did it, I press everywhere looking for a bad contact, but nothing. What I suspect is about the source DC input, some capasitor, Zener, or diode.
Because the Hu history tells about first day of no power, second day no power till suddenly reacts an power on alone. Third and beyond never power on again.. so.. if SOM is melted or bad, this resurrection randomly doesn't have explanation.

Oh, do you have sd cards inserted? Remove them and give a go?

Kayhan 17# said:
Oh, do you have sd cards inserted? Remove them and give a go?
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Click to collapse
Do you think this sd cards would be a problem to power on? I dont think so..
When I connect and desconnect the power supply from the board., HU reactos power on the button leds and immediately it power off and nothing more happen.

I had similar issues, remove cards and try if it works. I couldnt believe either ...

Kayhan 17# said:
I had similar issues, remove cards and try if it works. I couldnt believe either ...
Click to expand...
Click to collapse
Thanks for your help. Did you thinking on buy a PX5 4g SOM to replace the "bad" one?

@marchnz, im planing to apply your flash OTG method. Do you think it can work for my lock HU?
https://forum.xda-developers.com/android-auto/mtcd-hardware-development/px3-5-headunit-mod-recover-flash-som-t3766892