[Q] LCD not working after opening tablet - Transformer TF300T Q&A, Help & Troubleshooting

hello,
i have opened my Asus tablet (tf300tg) and just pull out digitizers cable and put it back on when the tablet was on. after putting the cover back on tablet i found that my tablet LCD is not working any more. i didn't even touch LCD cable. please for the love of god help me. i don't know what to do.when i power up my tablet i only hear a sound of tablet powering up and nothing on LCD. completely dark screen. what should i do? what goes wrong. all cables are connected . what should i do

hadivip said:
hello,
i have opened my Asus tablet (tf300tg) and just pull out digitizers cable and put it back on when the tablet was on. after putting the cover back on tablet i found that my tablet LCD is not working any more. i didn't even touch LCD cable. please for the love of god help me. i don't know what to do.when i power up my tablet i only hear a sound of tablet powering up and nothing on LCD. completely dark screen. what should i do? what goes wrong. all cables are connected . what should i do
Click to expand...
Click to collapse
Did you turn off the power on the motherboard switch before doing anything inside the tablet ?
What sound do you hear ?
Thx Josh

lj50036 said:
Did you turn off the power on the motherboard switch before doing anything inside the tablet ?
What sound do you hear ?
Thx Josh
Click to expand...
Click to collapse
no i didn't. after putting on the back cover i saw the screen is black. then i power off and on and i hear a sound through speakers. that was the sound my tablet play when i power on something like 'diling' !

does anybody know what should i do?

hadivip said:
does anybody know what should i do?
Click to expand...
Click to collapse
If the screen stays off no backlight nothing....
It is most likely a loose connection ...
Which mean you need to go back inside ...
See if all the ribbon cables on tightly in there slots ....
Thx Josh

Related

[Q] do you guys think its dead?

Hello guys, Long time lurker first time poster, I dropped my tablet last night and now it will not do anything, and i mean anything, no lights just a little vibration when I hold the power button for about 15 seconds. do you guys thing the MOBO is dead or just the screen and digitizer? I'm afraid the worst has happened and it is completely dead but i would like to get a few opinions first.
Thanks a lot guys, also I might have had one too many drinks before posting this so please excuse any nonsense, I've proofread this thing about 10 times so hopefully all is good.
It could be your connector for the screen came loose. If you have a HDMI cable, use it to hook it up to your tv, see if you can get anything to show.
baseballfanz said:
It could be your connector for the screen came loose. If you have a HDMI cable, use it to hook it up to your tv, see if you can get anything to show.
Click to expand...
Click to collapse
Thanks but I tried checking the connector to the mobo and its a no go, I don't have an HDMI cable so i cant try that. when i hook it up to the pc it shows up as NVIDIA storage... something i forgot. it doesnt show as a tablet and even asus sync doesnt recognize it. do you think its dead for sure?
also my drunk self doesnt know what hes talking about as the drop happened last week i just got around to messing with it last night.
Thanks for the help.
Maybe your volume up button is stuck so posing power on poor it in APX mode?
baseballfanz said:
Maybe your volume up button is stuck so posing power on poor it in APX mode?
Click to expand...
Click to collapse
Ok I just checked and disassembled as much as i could and nothing....i really hope its not completely dead but if it is its no big deal, i already have a nexus 7 so i might just buy a refurb 10" asus and use this one for spare parts.
Thanks a lot for your help btw

[Q] help with a bad shape explorer

Hi,
I have a big big problem with a explorer. I got this phone from a friend of mine for free because it has the display and touch screen broken, badly brocken. I can`t see anything on it, i just can tell you that when i press the power on , it vibrates once and that`s it. I connected the phone to the computer and it connects as removable storage but it is unaccessible. I tried vol down + pwr and connected the phone to the comp. and it connects as android bootloader interface or something like that(i am not home right now to tell you exactly) and pressed pwr and it connected as android 1.0.
Now the thing is that before all of above i disasembled the phone and had a surprise with the power and volume buttons... they fell off)and i soldered them back. I am afraid that the same problem has the speaker or the phone is badly damaged. I have to say that everything else looks ok.
After all this problem exposed, i am asking you, is it worth it to buy a display and touch screen ? I don`t have nobody to help me with a display to test it.. so is there a way to enter the phone`s memory maybe use android screen cast or something like this to test the phone?
Please help me with this problem.
Thx a lot.
Catastelea said:
Hi,
I have a big big problem with a explorer. I got this phone from a friend of mine for free because it has the display and touch screen broken, badly brocken. I can`t see anything on it, i just can tell you that when i press the power on , it vibrates once and that`s it. I connected the phone to the computer and it connects as removable storage but it is unaccessible. I tried vol down + pwr and connected the phone to the comp. and it connects as android bootloader interface or something like that(i am not home right now to tell you exactly) and pressed pwr and it connected as android 1.0.
Now the thing is that before all of above i disasembled the phone and had a surprise with the power and volume buttons... they fell off)and i soldered them back. I am afraid that the same problem has the speaker or the phone is badly damaged. I have to say that everything else looks ok.
After all this problem exposed, i am asking you, is it worth it to buy a display and touch screen ? I don`t have nobody to help me with a display to test it.. so is there a way to enter the phone`s memory maybe use android screen cast or something like this to test the phone?
Please help me with this problem.
Thx a lot.
Click to expand...
Click to collapse
First you should have to change your display then see what happens?..........If everything is fine with phone except dislplay then changed it and all other problems resolved one by one.
ha ha ha... buy a new phone man !!!!!
maksuperlink said:
First you should have to change your display then see what happens?..........If everything is fine with phone except dislplay then changed it and all other problems resolved one by one.
Click to expand...
Click to collapse
thx. i bought a new display and a touch screen and solved the problem. now i am writing from it. : D
Pico
Catastelea said:
thx. i bought a new display and a touch screen and solved the problem. now i am writing from it. : D
Click to expand...
Click to collapse
Good Luck Bro:highfive:

xperia e white screen

Friend gave me his broken phone (the phone freezed and he kick the phone into wall),i have replaced lcd because it was broken.when i power up the phone,screen was white,tried to install new stock rom(that was successfully) but phone still can not power on.when i touch the screen,i can hear the sounds of touching display.Can enybody please help me how to fix this?
edomali said:
Friend gave me his broken phone (the phone freezed and he kick the phone into wall),i have replaced lcd because it was broken.when i power up the phone,screen was white,tried to install new stock rom(that was successfully) but phone still can not power on.when i touch the screen,i can hear the sounds of touching display.Can enybody please help me how to fix this?
Click to expand...
Click to collapse
You've replaced LCD Screen, Have You done the digitizer?
No,digitizer is in fine condition
edomali said:
No,digitizer is in fine condition
Click to expand...
Click to collapse
Check the connections it there OK get another main board or send it to Sony.

[Q] black screen after screen replacement

I dropped my phone and shattered the screen. afterwards, the phone started behaving weird, the screen was purple with yellow static, but it still worked. So I bought a replacement screen and replaced it, but after the replacement, the same behaviour persisted. I googled it and found out that it might be the usb flex cable, so I replaced that. After the replacement it worked fine for about half an hour, then it just went black. Now when I turn it on, the backlight turns on, but nothing is being displayed. If I press down on the flex cable connector I get that purple yellowish screen that I had before, but as soon as I lift my finger, it goes black. Did I damage the connector on the motherboard or did I break the flex cable when replacing it?
Perhaps
not very helpful, but thanks anyways
I soaked all the components except the screen in alcohol for an hour and let them to dry, but it's still the same. By the way, I tried the old flex cable as well and it behaves the same.
entipck said:
not very helpful, but thanks anyways
I soaked all the components except the screen in alcohol for an hour and let them to dry, but it's still the same. By the way, I tried the old flex cable as well and it behaves the same.
Click to expand...
Click to collapse
Hi there, sorry to resurrect this topic, but I'm having this same issue, just wanted to know if OP found a solution to this.
aquilesboy said:
Hi there, sorry to resurrect this topic, but I'm having this same issue, just wanted to know if OP found a solution to this.
Click to expand...
Click to collapse
the solution is to resolder the connector of that flex cable on the nexus 5 mainboard. Use a heatgun and heat it up until the solder smelts, you can add some flux before that. That should fix it
234herobrine432 said:
the solution is to resolder the connector of that flex cable on the nexus 5 mainboard. Use a heatgun and heat it up until the solder smelts, you can add some flux before that. That should fix it
Click to expand...
Click to collapse
Thanks for the reply, I'll try that, recently the USB data stopped working, PC doesnt recognize the device anymore but I guess it is still charging because it hasnt turned off.

Xperia Z3-Black backlight only,no image.

Hello. I got this Z3 with a broken screen, when I got it it had only black backlight, no image, but the LCD cable on the bottom was cut, so I thought that was why it had no image.
So I replaced the screen with a new one, but the issue remains, no image, only black backlight.
Tried restoring the software with Sony PC companion, updated to latest version, but it didn't help.
The phone boots fine, touch works, I can select options and sometimes I even get audio readouts of what is on the screen, just no image.
Is this a dead motherboard or something else? Because I went through a couple of new screens, none worked, so I'm out of the ideas.
I haven't encountered a case like this before, the screen either works or doesn't, the fact that the touch works and I have backlight puzzles me. No backlight or no touch issues are a common case to me, but this is a new one.
Can someone help here?
Thnx
Same problem....
Hi all.I have the same problem and tried few screens with no luck.If I get z3 compact on hd tv via hdmi cable I can see that it works but no image on lcd only backlight and touch works.Did you find out what causes this problem?
egres said:
Hi all.I have the same problem and tried few screens with no luck.If I get z3 compact on hd tv via hdmi cable I can see that it works but no image on lcd only backlight and touch works.Did you find out what causes this problem?
Click to expand...
Click to collapse
It's a faulty LCD connector on the motherboard, in my case. Not the connector itself but the small jumper just above it, it gives power to the LCD, it was broken off.
I had it resoldered. Works fine now.
Could ju point me a bit closer whitch one it was?Did you get no image at all or something like the one on my picture?https://drive.google.com/open?id=0Bym65RPW_fIpeXlkX2NTYUw5SVk This is how mine looks like around the lcd connector.https://drive.google.com/open?id=0Bym65RPW_fIpTXZpWTFKby1Ua3c
egres said:
Could ju point me a bit closer whitch one it was?Did you get no image at all or something like the one on my picture?https://drive.google.com/open?id=0Bym65RPW_fIpeXlkX2NTYUw5SVk This is how mine looks like around the lcd connector.https://drive.google.com/open?id=0Bym65RPW_fIpTXZpWTFKby1Ua3c
Click to expand...
Click to collapse
No image at all, only black backlight ant the touch was responding.
The three square fuses on the bootom of the picture, it's similar in Z3, in my phone one of those was broken off.
Hi guys. I have almost the same problem but inverted. My display and touch is working but i dont have backlight. I can see the screen only if i put light on it.
Maybe u guys have a faulty digitizer responsible for image faulty(no image), better for send repair, flashing new stock firmware will not help
I tried with new digitizer, no luck. Tried jumping the fuse with no luck. Don't know what to try anymore.
GreatVortex said:
I tried with new digitizer, no luck. Tried jumping the fuse with no luck. Don't know what to try anymore.
Click to expand...
Click to collapse
egres said:
Could ju point me a bit closer whitch one it was?Did you get no image at all or something like the one on my picture?https://drive.google.com/open?id=0Bym65RPW_fIpeXlkX2NTYUw5SVk This is how mine looks like around the lcd connector.https://drive.google.com/open?id=0Bym65RPW_fIpTXZpWTFKby1Ua3c
Click to expand...
Click to collapse
Put the motherboard in the oven and bake it for a few minutes, it resold everything, if that's the problem, it will fix it.
For more infos and temperature / time, google it
Same problem here! i have tried new lcd, new flex cable. nathing works, lcd backlight turn on but no image, touch work cause i feel vibration while touching the lcd.
Pleas Helpppp Anyone with the genius mind??????
I'm facing the same problem with my Z3C, a friend of mine told me he applied this method on his phone and it worked but i'm not sure how to do it.
http://www.mobilerdx.com/2015/03/sony-xperia-z3-display-lighting-problem-repair-solution.html
z3 no display but backlight on
by jumperig the fuse near lcd conector it turns on the backlight .There is another fuse surrounding power manager ic which may got open & display ic is not powering.

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