Screen too dim, backlight(Maybe) not working. - Xiaomi Mi A2 Lite Questions & Answers

Hi all. I have a rather weird issue. After droping(oops) my phone, I ordered a new lcd. I shelved the phone as it was unusable until the screen arrived. When the screen arrived, I saw that the battery was dead. I charged it and changed the lcd. That's for the backstory. Fast forward to now. When I open the phone, the screen lights up at full brightness as one would expect at the android one logo. It stays there at full brightness for about 8secs But as soon as it starts loading android the screen dims to absolute dark. In the beginning I thought the phone was closing, you can't see anything... Unless you close the lights.
But even in absolutely dark room, the screen is still very dim, barely discernible. The phone works absolutely fine otherwise, touch camera sound etc. I backtracked the process and put it's original screen on, but it does the same.
I tried disabling auto brightness it does nothing. In fact, changing brightness from the slider does absolutely nothing whatsoever.
Tried calibrating the sensors from the engineering menu(not sure it was called that, the one you enter when you put numbers on the call menu) they seem to be working, but the brightness doesn't change.
Tried removing the battery for a prolonged amount of time (around 6 hours iirc). Still same.
At this point i'm thinking:
1)Software problem. I will really need to hard reset the whole thing, which i'd rather not, and hope for the best.
2)Bad screen, which doesn't explain why the previous one has the same problem, or why the screen works during the logo.
I hope I was able to give enough info. Any help would be greatly appreciated. Thanks!

Hi, I'm having almost the same issue (display very dim, but for me it is always very dim) and this manifested not after any dropping or screen replacement, I guess I just wrongly inputed a button sequence that configured the mobile in this weird status. It is really annoying as it is almost impossible to unlock sims, basically the phone is unusable, very frustrating....

Hey there, did anyone found a solution for this issue?

Has anyone solved this problem?

Have you found what was causing this?
I’ve the same issue, replaced the lcd on a xiaomi mi a1 and the backlight is present at the logo startup but completely black after that.[br]
On a dark room I can barely see the screen and all it’s working, but adaptive light button is missing, seems like the bootloader is able to use the backlight but not android itself

I have the exact same problem, i really hope someone knows a solution to this. I tried pretty much anything within my capabilities

Related

White screen, cable problems, unusable BA... Please help!! Thank you!

Hi all! I hope I'm not disturbing here, but I'm quite desperate with regards to my poor BA... After replacing the display about a year ago (the touch-sensitive layer had broken) everything was going well, but something bad has been happening for some months now, and I think it has come to the point of no-return...
At first, when I slid the BA open, there would be a point in which a change in the colors on the display happened, as if the the Red and Blue channels worked well while the Green one was dim (as noticeable during the boot process). Then, opening it completely, it came back to the normal state. The situation worsened, sort of "interference" could be seen while opening the BA, the touchscreen would lose calibration after some openings and closings and so on...
Now the worst: when I turn it on, the screen is completely blank and white; sliding it back and forth would once get it to work, but now it is completely useless. About halfway between the open and closed positions the backlight itself turns off and then on again. It is impossible to see anything and it is unusable!! I opened the BA and made sure everything was connected, I re-connected the LCD and the touchscreen cable but nothing changed... I don't know what to do...
Does anyone have any suggestions? Can I try to repair it or to have it repaired, or, as it is a bit visibly used, should I resign myself to saying it goodbye?? Thanks for your patience and help...
News!! I rried to replace the new screen with the old (broken touchscreen) one, and that one works. Save for a problem, the green colour is lightly dim in the exact positions in which the backlight goes off with the "new" but not working display... Does anyone have an explanation for this behaviour? Thanx again!!

Possible SOD issue...

Hey guys so my Tilt 2 has been having an issue when I put it to sleep. It goes to sleep fine, but when I wake it up the screen remains black. The actual device turns on, but the screen stays black. I can still make calls, receive calls, play music, etc. but I have to soft reset the device if I want to be able to see what I am doing.
From what I can tell my problem is different from the normal Sleep of Death issue where the device simply won't wake up.
I've searched through the forums looking for solutions and have tried pretty much everything from doing a hard reset, using different roms, formatting the internal memory, etc. Even after doing all of this, my device still suffers from this issue.
Any insight into my problem would be greatly appreciated!
I assume you've tried a simple reset using the reset button or pulling the battery out and putting it back in?
Aaron McCarthy said:
I assume you've tried a simple reset using the reset button or pulling the battery out and putting it back in?
Click to expand...
Click to collapse
Yeah every time I the screen goes black I soft reset it in order to get the screen to turn back on. The problem is that the issue persists through soft resets. I currently can't suspend my device because I can't get the screen to turn back on...
hold down the volume down button and then press the reset button (the physical reset button) this should bring you into your bootscreen the multicoloured screen.. if you can get there then you can flash a new rom on your phone... and thats a whole other ball game. It gets a lot of hype as being hard but its really super easy to do if you just follow the directions.
Tilt 2 dark screen solved
With the tilt 2, if the screen does not wakeup, but you can answer the phone, hear music, etc..., it is a malfunctioning light sensor, maybe hardware, or software related (drivers), but it is fixable. Just eliminate all calls for use of the light sensor.
I had this problem and took quite a while to figure it out, as there are several apps that poll the light sensor that cause problems.
First, go to start/settings/system/power/backlight and uncheck the auto adjust backlight option
Second, go to start/settings/personal/buttons/backlight and uncheck the enable keyboard auto backlight sensor.
Last, open advanced config (need to download and install from touchxperience.com, if you do not have it), tab to light sensor and set light sensor polling to disabled.
Now, my phone works normal and will wake up properly from standby like it should. this all seems hardware dependant, as I have in my family 3 of these things and I dropped and broke mine, so bought a new one (4th in the series) and it had the SOD issues, but could restart with softrest. Took me the better part of the day to find a reliable fix, but now all is well again.
Hope this helps other Tilt 2 and similar issues.

Display Graphic problem

I've got a problem with a OneX I'm trialling for work.
This is a stock device with the latest OTA update applied. I installed Good for Enterprise, activated it, and got my work emails. I opened a PDF attachment which opened for a couple of seconds then the display glitched.
The attached images show what I mean. The display is glitched for every screen. Soft resetting the phone was okay until it started again a couple of minutes later.
Soft resetting a 2nd time was where my real problems started. The phone vibrated as it started, but the display stayed dark. If I tap the power, the touch buttons light up. If I go through the motions of the lock ring and my gesture lock, I feel vibrations of my actions but can't see a thing. If I ring the phone, it rings, the touch buttons light up and the LED blinks. The display stays dark at all times.
Does anyone have any idea what's going on here? It's almost like when a graphic card overheats in a PC.
I would try a hard reset, see what that does, it should fix it as it looks like software problem
Squeeze your phone between thumb and forefinger (on the screen and rear cover) about 1.5-2cm in from the USB port, and slightly below. Let us know if the screen comes back on.
ZenithUK said:
I've got a problem with a OneX I'm trialling for work.
Click to expand...
Click to collapse
I think your phone is on drugs.
Seriously though, that's the scariest gfx bug I've seen on a phone.
Work were just as surprised as everyone else.
It's been sent back to them so they can talk with Vodafone about just what's happened with it.
In the few days I had it, it's a decent phone. The primary reason for considering the OneX is the screen size, and the fact you can read a PDF clearly on it.
ZenithUK said:
I've got a problem with a OneX I'm trialling for work.
This is a stock device with the latest OTA update applied. I installed Good for Enterprise, activated it, and got my work emails. I opened a PDF attachment which opened for a couple of seconds then the display glitched.
The attached images show what I mean. The display is glitched for every screen. Soft resetting the phone was okay until it started again a couple of minutes later.
Soft resetting a 2nd time was where my real problems started. The phone vibrated as it started, but the display stayed dark. If I tap the power, the touch buttons light up. If I go through the motions of the lock ring and my gesture lock, I feel vibrations of my actions but can't see a thing. If I ring the phone, it rings, the touch buttons light up and the LED blinks. The display stays dark at all times.
Does anyone have any idea what's going on here? It's almost like when a graphic card overheats in a PC.
Click to expand...
Click to collapse
Mine looks exactly the same once Ive had a few whisky's...
I had the exact same problem, so I shipped off my phone to service.
They actually changed the whole motherboard. I got my phone back 2 days ago, and it is working better than ever. Even better than before they changed the board.
My guess; Same problem as me. Busted motherboard. Im waiting to get a reply from the service guys that fixed my phone, so I can get some solid answers about what was actually wrong.
Hope this helps!
Best regards,
Sebastian

[Q] screen flickering

Hi guys,
anyone had an issue where the screen flickers really badly? Mine has been working great then today it did a weird glitch where the button bar at the bottom went halfway up the screen, and the screen flickered really bad, like a tube light starting up. Ive reset it and now its flickering like a fluorescent tube light. everything still works, but im on the phone to three now organising to get it returned.
cheers
Ray
ok, so an update to this. after leaving the phone on all day the flickering screen stopped flickering, however now i have an issue where plugging my ear pollution headphones causes the phone to now show as a headset with microphone, and the voice assistant to appear. It is also now getting really hot on charging where it didnt before, so my returns envelope arrived today, and its off back to LG for a repair. Seems very strange how its happened after a month of relatively light use, where my 2 htc phones were working great after 2 years of use?
anyway, lets see what rubbish comes back from LG
Home screen Magnifies
I have a weird problem with LG G3 screen
When i double tap to lock the screen .....Home screen Magnifies and if i double tap on that again it goes back to normal
I dont understand why .....can anyone please suggest me if any option to be tweaked under settings
Thanks
Vj Roshan

Replaced screen - now it auto dims so I can barely see the screen and I can't adjust it

My wife cracked her Redmi 7 screen so I ordered a replacement screen+digitizer+frame from a reputable seller on AliExpress. I followed a guide to the letter and made sure not to damage anything while disassembling, and the re-assembly with the new screen went smoothly.
When I power on the phone the Xiaomi logo comes up nice and bright, but it then auto-dims in the usual way as it loads the system except it dims to an extreme level. I mean it dims so much I can only see what's on the screen if I go into a dark room/closet. When the system loads I can navigate menus normally (as long as I'm in a dark room) but changing the brightness setting has no effect. Turning on/off auto brightness does nothing either.
It doesn't seem like there's anything wrong with the LCD, because if I reboot to bootloader it sits there with the Fastboot logo and picture at full brightness until I turn it off. I took the phone apart again to check if there was anything obstructing the light sensor and I can't see anything wrong with it.
Has anyone seen this before?
Thanks

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