Video-In issue - MTCD Android Head Units General

I had rear camera problem with my RK3188/1GB unit but now discovered that is a general video-in issue.
Rear camera works well when I start the car. When the head unit warms up rear camera video does not show up anymore. The screens shows an exclamation point indicating now video signal.
Today I tested video-in (AVIN) and Front Camera (F-Cam) input, and the same problem happened for both inputs: working when car starts and no signal after warming up.
In all tests, I used an external working video RCA input to make sure video signal is 100% OK.
I believe this is a circuit board problem and but do not know which board is at fault.
Is it coreboard? If I upgrade to another coreboard (8-core/4GB) could the problem be fixed?
Any help is much appreciated.

yves31 said:
I had rear camera problem with my RK3188/1GB unit but now discovered that is a general video-in issue.
Rear camera works well when I start the car. When the head unit warms up rear camera video does not show up anymore. The screens shows an exclamation point indicating now video signal.
Today I tested video-in (AVIN) and Front Camera (F-Cam) input, and the same problem happened for both inputs: working when car starts and no signal after warming up.
In all tests, I used an external working video RCA input to make sure video signal is 100% OK.
I believe this is a circuit board problem and but do not know which board is at fault.
Is it coreboard? If I upgrade to another coreboard (8-core/4GB) could the problem be fixed?
Any help is much appreciated.
Click to expand...
Click to collapse
I hav the same issue problem I caused where in the advance settings I change it and forgot the one that they used when shipped to me
Sent from my [device_name] using XDA-Developers Legacy app

wingtytn said:
I hav the same issue problem I caused where in the advance settings I change it and forgot the one that they used when shipped to me
Sent from my [device_name] using XDA-Developers Legacy app
Click to expand...
Click to collapse
This may not be issues in settings. You may press default button in settings to get back to the original settings.
In my case I know it is due to defective hardware and heat caused the video unresponsive to signals. I opened the box, removed built-in dvd to free some space, and installed a case fan to reduce heat. It is better now and I can get video working if the air temperature does not exceed 22C. On a hot day the video still has the problem.

Related

htc external speaker issue

i tried searching the forum but couldnt find any info on it.
the external speaker on the htc one x stopped working but if you tap the back casing the speaker works for few hours and then the problem comes back again. i tried flashing a new rom it works for a bit and and then had the same problem again. is there any suggestions what could be done to solve this issue?
Maybe you got a defected HOX ??
chaun1308 said:
Maybe you got a defected HOX ??
Click to expand...
Click to collapse
found the fix. it was the contacts that connects the speaker module to the board, may be the contacts( the same type of pins that caused the wifi issue) on my HOX got pressed too much i guess, probably going to solder the pins when i get home as of now have it taped up for the testing
i had the same problem when i openned my HOX, after closing, back button led and speaker didn't work, i disassembled and reassembled again and it works, so watch out if you'll open it!
I see ... Hope you get it fixed then
soldered all four connection, did a test didnt work so i played with the speaker connection a bit and it worked. i guess the speaker had a loose connection or something as of now placed a bit of masking tape and closed the housing. working so far now. i guess the problem is with the chip where speaker is plugged
Had the exact same problem, although it degraded to the point that tapping the grille only brought sound back for a second in the end.
Got HTC to repair it along with the wifi.
Rusty! said:
Had the exact same problem, although it degraded to the point that tapping the grille only brought sound back for a second in the end.
Got HTC to repair it along with the wifi.
Click to expand...
Click to collapse
I don't have warranty Canada is nt covered for global warranty. For now I will just leave it like this. If sadly problem came back then I will take it to HTC.

Front facing camera

Hey guys,
afew weeks ago, I dropped a 60lbs dumb bell on my phone, it didnt crack the screen but there was some clear damage.
The wifi/bluetooth (same chip) no longer works and the front facing camera throws out an error when it tries to initiate. I'm probably going to buy a new FF camera, anyone else have any experience with anything of the sort? maybe damage wifi chip fix, a link to the chip itself that would be soldered in, possibly? Thanks!
emeianoite said:
Hey guys,
afew weeks ago, I dropped a 60lbs dumb bell on my phone, it didnt crack the screen but there was some clear damage.
The wifi/bluetooth (same chip) no longer works and the front facing camera throws out an error when it tries to initiate. I'm probably going to buy a new FF camera, anyone else have any experience with anything of the sort? maybe damage wifi chip fix, a link to the chip itself that would be soldered in, possibly? Thanks!
Click to expand...
Click to collapse
So many views, anyways - Updating, purchased front facing camera. I will be replacing it as soon as it comes in. So i'll keep ya'll posted. :highfive:
Does gps work? The little gold connectors are next to the camera and they are fragile.

Broke Camera Ribbon

So as I was replacing the screen my nexus I stabbed the camera ribbon the screw driver hoping it didn't do anything. Ends up the camera is dead and is no longer showing up as recognized. I open the camera app and it crashes. Few apps allow me to use front camera still. So I ordered the replacement and waiting. It seems my LED isn't working and i know I didn't hit that but would that have a relation to camera. Like will it work after I replace the camera?
cgibbons51 said:
So as I was replacing the screen my nexus I stabbed the camera ribbon the screw driver hoping it didn't do anything. Ends up the camera is dead and is no longer showing up as recognized. I open the camera app and it crashes. Few apps allow me to use front camera still. So I ordered the replacement and waiting. It seems my LED isn't working and i know I didn't hit that but would that have a relation to camera. Like will it work after I replace the camera?
Click to expand...
Click to collapse
I haven't looked at this in awhile but the ifixit teardown might help you see if the LED and camera are integrated with the ribbon that you accidentally stabbed.
https://www.ifixit.com/Teardown/Nexus+5X+Teardown/51318
Sent from my Nexus 5X using Tapatalk
SlimSnoopOS said:
I haven't looked at this in awhile but the ifixit teardown might help you see if the LED and camera are integrated with the ribbon that you accidentally stabbed.
https://www.ifixit.com/Teardown/Nexus+5X+Teardown/51318
Click to expand...
Click to collapse
Well I tried that and it appears they aren't connected. The LED is actually soldered straight to the motherboard. What's odd is they worked before the screen replacement and before the camera ribbon problem. But it appears apps that control the LED are saying I literally don't have LED. Like it says it appears your phone doesn't have LED support so we will use your screen blah blah blah.
cgibbons51 said:
Well I tried that and it appears they aren't connected. The LED is actually soldered straight to the motherboard. What's odd is they worked before the screen replacement and before the camera ribbon problem. But it appears apps that control the LED are saying I literally don't have LED. Like it says it appears your phone doesn't have LED support so we will use your screen blah blah blah.
Click to expand...
Click to collapse
I am entirely uneducated in this regard, but maybe it is possible the LED issue is associated with the camera ribbon? Are you certain the LED was not dislodged in any way? Either way, I think it is a waiting game until your replacement camera arrives and you can slot that in to test.
SlimSnoopOS said:
I am entirely uneducated in this regard, but maybe it is possible the LED issue is associated with the camera ribbon? Are you certain the LED was not dislodged in any way? Either way, I think it is a waiting game until your replacement camera arrives and you can slot that in to test.
Click to expand...
Click to collapse
Yah didn't even touch the LED at all. Waiting game it is
update i replaced and camera and boom LED works so i guess there's an odd connection somewhere thanks for help!

Wifi Bluetooth Antenna problem with connection

Hey guys,
I have a problem with my OP3. I dropped it and it had a big dent on the back. So I decided to open it an try to press the dent back into shape.
After reassembling my Wifi and bluetooth are broken. I can get connections but the range is realy bad, about 5m for Wifi till it disconnects and about 5cm for Bluetooth.
I opened it a second time to take a look if i missed a connector or something and i saw a clip (those small things that connect to the back of the phone) was broken so i ordered a sparepart (it was the headphonejack circuit board) and changed it but its still not working.
Does anyone know where the bluetooth and wifi antenna are positioned ?
Have i just broke my phone or can i change something to get it back to work ? Everything else is working fine.
Thanks in advanced
Dennis
Same problem here! After I replaced the screen I lost my WiFi and bluetooth connections as well. WiFi is working in a range within 2m.
Is changing the coax antenna cable a solution?
Many thanks in advance from me as wel
Ken
Glad I'm not the only one, so maybe we get more help when more people have the same problem.
I changed the backplate cause of the dent and because the antenna is built in there but didn't change anything.
I have ordered a coax cable and will replace it when it arrives, could be today. Will post afterwards if this helped, but I'm not realy confident in that because i haven't done anything with this cable while repairing.
Maybe someone knows more about this, i just don't get why it is working but has no range, makes no sense to me ...
I have opened my phone several times now, but nothing seems to work.
Do you have an update on the coax cable yet? I hope it works, or the one plus 5 has to hurry ?
Hey there, same for me, opened it up to 10 times now but nothing helped, coax cable was a failure too. I realy don't know what it could be.
I'm about to wait for the OP5 or get a used 3(T) depending on what the . Was thinking about getting one with cracked screen and change everything but not sure if i should try it.
I have the same problem now. Any updates?
Hi guys! Yesterday I changed the camera of my OnePlus 3 because it wasn't focusing anymore, after reassembling my phone I noticed it wasn't connecting to the wifi anymore, tried Bluetooth and it was the same problem... I had to be really close for it to connect
Did any of you had any luck solving this problem? Did changing the board in the bottom of the phone not solve it? It seems that's where the WiFi is... Or maybe changing the backplate
Thanks in advance!
qibeike said:
Hi guys! Yesterday I changed the camera of my OnePlus 3 because it wasn't focusing anymore, after reassembling my phone I noticed it wasn't connecting to the wifi anymore, tried Bluetooth and it was the same problem... I had to be really close for it to connect
Did any of you had any luck solving this problem? Did changing the board in the bottom of the phone not solve it? It seems that's where the WiFi is... Or maybe changing the backplate
Thanks in advance!
Click to expand...
Click to collapse
i also have same problem , need fix
Anyone found a solution? I had the same problem when I replaced the fingerprint sensor + the battery
I've been without wifi for 4 months now... Any help is appreciated
Hi, guys. I have the same problem. Did anyone find a solution?
I replaced my rear camera and the loudspeaker, at reboot wifi was not working. I noticed that if I'm near the access point network is detected but with very poor signal strength. Thanks.
Hi, maybe I could have found a possible reason to our lack of wifi and bluetooth signal.
Please look at this thread and give me your opinion. Probably your mainboard shows the same problem.
https://forum.xda-developers.com/oneplus-3t/help/wifi-bluetooth-signal-camera-replacement-t3902122
Thanks, guys.
Denzo90 said:
Hey guys,
I have a problem with my OP3. I dropped it and it had a big dent on the back. So I decided to open it an try to press the dent back into shape.
After reassembling my Wifi and bluetooth are broken. I can get connections but the range is realy bad, about 5m for Wifi till it disconnects and about 5cm for Bluetooth.
I opened it a second time to take a look if i missed a connector or something and i saw a clip (those small things that connect to the back of the phone) was broken so i ordered a sparepart (it was the headphonejack circuit board) and changed it but its still not working.
Does anyone know where the bluetooth and wifi antenna are positioned ?
Have i just broke my phone or can i change something to get it back to work ? Everything else is working fine.
Thanks in advanced
Dennis
Click to expand...
Click to collapse
hey bro
i also have the same problem if u have found the solution plz tell me also
email [email protected]
or instagram Kappil_antil

bad wifi reception due to faulty hardware

Hello community,
due to a water incident I had to replace some hardware parts as microphone and finger print sensor.
The navigation proximity buttons do also not work, but I did not replace them.
After this replacement, the phone worked 3 months fine....then I replaced the main camera because it didnt focus anymore.
Since the camera replacement I have very bad wifi reception. When I am right next to the rooter, it is working but unstable. Thats why I suspect an antenna/hardware problem or another hardware issue. I did replace the black coax cable (also a used cable) next to the battery already, but this did not resolve the problem.
On the software side I did a complete reset. Actually twice because I had to unlock the bootloader and then did a reset. Also not resolving the problem.
- I am now wondering, weather there are more or different wifi antennas in the onplus 3 except the black coax cable.
- Does anyone have experience about the sensitivity of those coax cables? The replacement cable I have is also from a used phone and has some usage marks.
- Anyone another Idea, where the problem can be?
Thanks for any suggestions!
gino.rockt said:
Hello community,
due to a water incident I had to replace some hardware parts as microphone and finger print sensor.
The navigation proximity buttons do also not work, but I did not replace them.
After this replacement, the phone worked 3 months fine....then I replaced the main camera because it didnt focus anymore.
Since the camera replacement I have very bad wifi reception. When I am right next to the rooter, it is working but unstable. Thats why I suspect an antenna/hardware problem or another hardware issue. I did replace the black coax cable (also a used cable) next to the battery already, but this did not resolve the problem.
On the software side I did a complete reset. Actually twice because I had to unlock the bootloader and then did a reset. Also not resolving the problem.
- I am now wondering, weather there are more or different wifi antennas in the onplus 3 except the black coax cable.
- Does anyone have experience about the sensitivity of those coax cables? The replacement cable I have is also from a used phone and has some usage marks.
- Anyone another Idea, where the problem can be?
Thanks for any suggestions!
Click to expand...
Click to collapse
The problem can be the constant opening up of the phone and meddling with it.
gino.rockt said:
Hello community,
due to a water incident I had to replace some hardware parts as microphone and finger print sensor.
The navigation proximity buttons do also not work, but I did not replace them.
After this replacement, the phone worked 3 months fine....then I replaced the main camera because it didnt focus anymore.
Since the camera replacement I have very bad wifi reception. When I am right next to the rooter, it is working but unstable. Thats why I suspect an antenna/hardware problem or another hardware issue. I did replace the black coax cable (also a used cable) next to the battery already, but this did not resolve the problem.
On the software side I did a complete reset. Actually twice because I had to unlock the bootloader and then did a reset. Also not resolving the problem.
- I am now wondering, weather there are more or different wifi antennas in the onplus 3 except the black coax cable.
- Does anyone have experience about the sensitivity of those coax cables? The replacement cable I have is also from a used phone and has some usage marks.
- Anyone another Idea, where the problem can be?
Thanks for any suggestions!
Click to expand...
Click to collapse
I have the same problem with my oneplus 3, i too had to change my back camera because it didn't focus, which after many attempt didn't work and i ended up using a magnet right next to the camera.
I purchased a coax black cable but it didn't solve anything.
I also have switched between a numerous amount of rom and i can tell it's hardware.
So it's either the main board that suffered from the chirurgical operation we had to do or the back's antenna that are faulty, i don't think removing the camera would make any difference.
My wifi reception is really bad and i can't get a decent bandwidth even right next to the wifi...
I'll have to re-open it to change the amoled that just broked so i'll keep you updated.
Changing the back of the phone can make any difference?
Thanks!

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