Black/blank screen but phone working problem - Android Q&A, Help & Troubleshooting

Hi! I have an asus zenfone max pro m1 (zb602kl) which the screen is black/blank but working (i can call it). I can put it in different modes like recovery (because the led light stays red which is different when the phone is just on) . When connected to pc via usb, it shows a device named sdm636-qrd and does not mount the drives.
Is this a hardware or software problem? Can anyone kindly give me idea what is wrong with this phone.
Thanks in advance.

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I have a problem with this device:
The person who give it to me sayd that he tried to put a new .cab on it, and after a requered restart that he made, the device didn't started any more. Now if I connect the batery a green light is apearing every 6-7 seconds without any image on display or enything else.
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bricked myphone:alternating batt. logo and myphone logo shows wen conected 2 laptop

hello, good day android wizards, a noobie here and i decided to post here because i cant find any similar device and its symptoms. i am using myphone agua rio fun jellybean version and i rooted it but yesterday i deleted the backup file thanks to my hidden moronic abilities now i am seriously regretting it i keep pressing the power button until the bone on my thumb dislocates and nothing shows. i also tried to press powerbutton+volumeup+volumedown a message shows recovery mode and factory mode and when i choose any of those 2 options the device will shut down for no reason. and when it is connected to laptop it will show the battery screen for about 18 secs and disappears and after 10 secs the myphone logo appears, its like they are alternating everytime and on my laptop i will hear a notification sound that the usb is inserted when the screen lights up and another notification sound for removed usb when the screen turns off even it is plugged in to my laptop for a long time again and again and again. i tried to format the sd card hoping something might happen but nothing changed.
can someone help me fix this problem or does someone has the same problem with mine? i am kindly sincerely asking for any help to solve this. please lend me your wisdom

Unlock Galaxy Note III with broken display (visual and touch broken)

Hi everyone
This morning my Galaxy Note III fell on the floor and ever since its display seems completely broken (its not split or anything, but it remains black after restart and its impossible to unlock it as the touch screen doesn't respond anymore). I already have a new phone but the problem is that I want to save all data like pictures and whatsapp histories not being on the SD card. I tried to connect with ADB but it keeps saying that the device is not authorized. Usually one needs to confirm on the Galaxy when connecting with ADB. But know, as the touchscreen seems dead, thats not an option anymore :-/
The phone seems still perfectly operable otherwise.
Is the any chance to access the phone??
Best regards
Samuel
I already tried to connect an external mice using USB OTG. It seems to work, at least the lights beam up, when I move the mouse around.
Unfortunately, I do not get any feedback on whether the phone is unlocked or not and of course, I don't see the curser as the screen is black :-/

Black screen issue, i can't restart the phone

Hi! I'd like some help.
I have a Samsung Galaxy S10e (SM-G970F).
The power button is faulty, I got it back from service yesterday, unfortunately it was not repaired because the device is rooted.
Before I handed it in for service, I was able to turn it on without the power button (download mode -> restart), but now the download mode is not available either.
And it doesn't indicate charging either, the display is completely black at all times.
Yesterday the computer recognized it as a drive, but it showed only one TWRP folder. Today, unfortunately, the computer does not even recognize it, nothing happens when the usb cable is connected.
Is it possible that the device has remained in some service mode?
Somehow I would have to reboot or get into download mode, I just don’t know how..
So now:
The display is completely dark.
It does not respond to buttons.
The power button is broken.
It does not indicate charging.
The download mode does not start. (volmune down + bixby button & connect usb data cable -> nothing happens.)
The computer does not indicate a usb connection.
The adb doesn't see either: error '(null)' not found.
What can I do?
To me it seems phone's boot-loader is broken: a working boot-loader would start Android's "init" process what automatically starts ADB on phone, if USB-debugging got enabled on phone, what in turn would make the phone accessable via USB.
jwoegerbauer said:
To me it seems phone's boot-loader is broken: a working boot-loader would start Android's "init" process what automatically starts ADB on phone, if USB-debugging got enabled on phone, what in turn would make the phone accessable via USB.
Click to expand...
Click to collapse
Thanks for the reply.
However, I have new news about the device.
I realized that the device itself works, only the display is always dark.
I disassembled, unplugged the battery from the motherboard, and switched back to download mode and Odin recognized it.
I managed to update the software on it, the device restarted fine, only the display is completely dark.
The computer already recognizes it, I can give a command via adb, and I can hear the volume button when pressed.
The only problem is that there is no picture on the display.
I reconnected the display connector to the motherboard, but that wasn't the problem.
When the power is off, the display does not indicate that the charger is connected.
Does anyone have any idea what else I can do?
Mr. BonG said:
Thanks for the reply.
However, I have new news about the device.
I realized that the device itself works, only the display is always dark.
I disassembled, unplugged the battery from the motherboard, and switched back to download mode and Odin recognized it.
I managed to update the software on it, the device restarted fine, only the display is completely dark.
The computer already recognizes it, I can give a command via adb, and I can hear the volume button when pressed.
The only problem is that there is no picture on the display.
I reconnected the display connector to the motherboard, but that wasn't the problem.
When the power is off, the display does not indicate that the charger is connected.
Does anyone have any idea what else I can do?
Click to expand...
Click to collapse
Your hardware is faulty, replace the screen.
Sent from my SM-S767VL using Tapatalk

black screen no debugmode

Hi everyone !
I was an mate 10 pro's owner 'till past friday... he fell to the ground and the screen is now broken, it stays black.. unfortunately i did not activate the debugg mode... so now i just can't retrieve my datas to transfer to my new phone (pixel 6 btw..) i searched any solutions but it seems there is none... my computer says a new USB devices has been connected but with error... i can't see the phone on my computer and i can only see MTP device on usb device pannel...
Do you have any solution?
thanks you !

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