I got my tf300 some time ago, and just today i recieved all the components needed in order to change it;note that the tablet was disasembled for more than a month, but before that, the battery was charged, so it remained like a month like that as well i don't have best memory of the disasembly proceedure.
So today, i managed to pack it back (without putting the back cover of the tablet, and tried to boot it, but nothing happened.So i put it on the charger where a sound (charging sound) beeped and a red led turned on (later green).I let the tablet charging for more than half an hour, and tried to boot it again but no sign of life at all.I removed all the screws etc and disassembled it for one more time in order to check if everything was put right.
Both digitizer cables was secured.
Screen cable was fine.
Also i tried to check the on and volume rockers cable and by mistake i ruined the plastic top of the female adaptor, but the cable still fits fine inside (that happened during the second disassebly so it was not the original cause for sure).
Also, i noticed that there is an on/off switch next to the power button.This switch was ON the whole time.
I found a button at the digitizer circuit and pressed it (tablet off).
I've tried to remove the digitizer and try to boot.Nothing happened.
What i am afraid of, is that the whole proceedure make me burn some circuit of the tablet by static electricity or by sort-circuit something by my slightly swetty hands.
TheoKondak said:
I got my tf300 some time ago, and just today i recieved all the components needed in order to change it;note that the tablet was disasembled for more than a month, but before that, the battery was charged, so it remained like a month like that as well i don't have best memory of the disasembly proceedure.
So today, i managed to pack it back (without putting the back cover of the tablet, and tried to boot it, but nothing happened.So i put it on the charger where a sound (charging sound) beeped and a red led turned on (later green).I let the tablet charging for more than half an hour, and tried to boot it again but no sign of life at all.I removed all the screws etc and disassembled it for one more time in order to check if everything was put right.
Both digitizer cables was secured.
Screen cable was fine.
Also i tried to check the on and volume rockers cable and by mistake i ruined the plastic top of the female adaptor, but the cable still fits fine inside (that happened during the second disassebly so it was not the original cause for sure).
Also, i noticed that there is an on/off switch next to the power button.This switch was ON the whole time.
I found a button at the digitizer circuit and pressed it (tablet off).
I've tried to remove the digitizer and try to boot.Nothing happened.
What i am afraid of, is that the whole proceedure make me burn some circuit of the tablet by static electricity or by sort-circuit something by my slightly swetty hands.
Click to expand...
Click to collapse
Uhh, the on/off button should be always on ON if you are turning on the tablet, always have it like that...
Also, make sure that the digitizer's end is well plugged
TheoKondak said:
I got my tf300 some time ago, and just today i recieved all the components needed in order to change it;note that the tablet was disasembled for more than a month, but before that, the battery was charged, so it remained like a month like that as well i don't have best memory of the disasembly proceedure.
So today, i managed to pack it back (without putting the back cover of the tablet, and tried to boot it, but nothing happened.So i put it on the charger where a sound (charging sound) beeped and a red led turned on (later green).I let the tablet charging for more than half an hour, and tried to boot it again but no sign of life at all.I removed all the screws etc and disassembled it for one more time in order to check if everything was put right.
Both digitizer cables was secured.
Screen cable was fine.
Also i tried to check the on and volume rockers cable and by mistake i ruined the plastic top of the female adaptor, but the cable still fits fine inside (that happened during the second disassebly so it was not the original cause for sure).
Also, i noticed that there is an on/off switch next to the power button.This switch was ON the whole time.
I found a button at the digitizer circuit and pressed it (tablet off).
I've tried to remove the digitizer and try to boot.Nothing happened.
What i am afraid of, is that the whole proceedure make me burn some circuit of the tablet by static electricity or by sort-circuit something by my slightly swetty hands.
Click to expand...
Click to collapse
"...I found a button at the digitizer circuit and pressed it (tablet off)...". How do you mean? If you're referring to the reset button on the Touchscreen pcb, that usually does not turn anything off, just resets to boot the tab again. In any case, you said "tablet off", meaning it was "on" before that? How do you tell it was on then? One way to find out would be to hook it up to a tv via HDMI. If it comes on, either the lcd or the cable is the problem. I've run into a situation where the tab works (comm. thru PC) but the graphics part is dead, hence no display, in which case the only solution would be a new motherboard as graphics reside within the CPU.
I mean it was turned off before i press the button.I will try to find a cable in order to check it on TV, but if hte GPU is dead how the HDMI works?By the way,i just tried to plug the tablet to my PC, and the PC recognize the device!That probably means that the device is on,but something goes wrong with the display.
TheoKondak said:
I mean it was turned off before i press the button.I will try to find a cable in order to check it on TV, but if hte GPU is dead how the HDMI works?By the way,i just tried to plug the tablet to my PC, and the PC recognize the device!That probably means that the device is on,but something goes wrong with the display.
Click to expand...
Click to collapse
If the GPU is dead then of course there won't be any display. But how do you find out? With the HDMI connection.
Related
I am hoping someone can help...
I have a TF101 tablet that my kids use and we use to play movies on when we travel.
Yesterday my kid was playing a game on it. When it was dinner time she exited the game and pushed the power button to turn off the screen. Now it will not turn on.
It is not dead (the battery was just charged prior to her playing the game). I tried holding down the power button for 15 seconds. I tried Power + Vol down button, Power + Vol up, but nothing! Just a black screen.
Last year the exact same thing happened to the tablet. I was using it, turned off the screen and then nothing! Just a Black Screen and nothing I did worked. It was still under warranty so I sent it to ASUS. They received it, fixed it and shipped it back out to me 3 days later. When I got it back it I noticed that nothing was wiped from my tablet. All my apps, all my data, everything was still there. So, I figured it was THAT big of a problem that they had to do a Hard Reset or replace my tablet.
That said, since it happened again, I am hoping someone might have a fix for this. It is not under warranty anymore and we are going on a trip in 1 month and I would love to get it working so the kids can watch movies on it.
Won't it turn on when you connect the charger to it either ?
Faulty power button ?
Yea, nothing.... I plug in the power cable and still just a black screen. (I have 2 cables and tried them both)
I know they are prone to pulling the LCD cable out of the board inside if they are dropped or knocked, the cable is wrapped around the battery which shifts when its knocked and pulls it out
If you're happy to open it up, its an easy enough fix to push it back in
Sounds likely that's what's happened
This is a good teardown video, the cable is the silver one iirc
https://www.youtube.com/watch?v=k-6dKsGJ4VY
Thanks, I will give it a try.
Well, I took it apart and the cable seems to be ok. I even removed the cable and reinserted it. Still nothing.
I did not check the other end of the cable (the one that goes under the board) as it would require me to remove a lot more stuff to get to it.
I am pretty sure it is the screen though because if I hold the power button down, after 10 secs or so I can hear a *click* sound. So I am assuming it is still working, just something is messed up with the screen.
I might break it down even more and check out the other end of the cable when I have some more time.
I hope it's not you power button, because request changing part of motherboard (79$)
Envoyé depuis ma TF101G-B80 with Revolution HD 4.0 (3.6g release) by Mike _1986
stephane.papin said:
I hope it's not you power button, because request changing part of motherboard (79$)
Envoyé depuis ma TF101G-B80 with Revolution HD 4.0 (3.6g release) by Mike _1986
Click to expand...
Click to collapse
Plugging in the charger would turn the screen on
---- @op - Does the screen backlight come on ?
If not, if you tilt the TF and look carefully at the screen, can you see an image ?
So apparently I was messing with the wrong cable... I found another video that shows what cable to check. I will be checking it later today, wish me luck... I was checking the silver cable running from under the battery.
Here is the video
AzWizzard said:
So apparently I was messing with the wrong cable... I found another video that shows what cable to check. I will be checking it later today, wish me luck... I was checking the silver cable running from under the battery.
Here is the video
Click to expand...
Click to collapse
Yea that's the cable I thought it was too, my mistake!
I've not had this exact problem so assumed as it was wrapped around the battery that was the cable in question
Good luck!
Well, that was it! Once I opened it up again and looked at the right cable I could see it was pulled 1/2 way out. Plugged it back in and it worked!
Thanks for the help!
AzWizzard said:
Well, that was it! Once I opened it up again and looked at the right cable I could see it was pulled 1/2 way out. Plugged it back in and it worked!
Thanks for the help!
Click to expand...
Click to collapse
Great news!
fix to turn on transformer 101 tablet
I had this problem with my asus and windows tablets. Unplug everything from it including base micro sd card and any usb plugs get an alcohol wipe clean all the charger plugs and sockets don't soak just wipe. When done plug charger to mains power and tablet it should turn on. If the on board battery is flat may take a couple of goes to start. Worked a treat for me.
What to do if I can't see any image or any light?
*Detection* said:
Plugging in the charger would turn the screen on
---- @op - Does the screen backlight come on ?
If not, if you tilt the TF and look carefully at the screen, can you see an image ?
Click to expand...
Click to collapse
Hi,
I guess I am having the same problem. So, what should I do if I can't see any image or any light on the screen?
And btw when I press the power button, immediately within 1 second I can hear a click sound.
Thanks in advance.
That says it all really. I bought a nexus 5 battery from (hopefully) a reputable source. The battery had all the same markings as my original battery.
I looked online for a video on how to replace the battery. I followed it. Now it is charging, but there is a blinking red light. After some googling, this could mean that the battery is completely drained and it should take a little longer than normal to charge.
However, it's now been charging for about an hour and no change. I tried to turn it on and no dice.
Did ya get it fixed?
It's a similar behaviour what you describe to a G2 what I've seen so far. I think the only way to get it charging, is to charge the battery in a external charger, or better, checking the voltage. If it's too much undervolted (<3V) then the battery will likely be damaged. I think the device refuses to charge if the battery is too much drained, so it's possible that you can't get it working if you leave it in the N5.
Maybe try a more powerful charger and maybe a different USB cable. Leave the phone on the charger for a few hours.
Actually, after googling, I found an answer on a youtube, so I should probably put it here.
I had to take off the back cover again, remove the internal protector, and disconnect the battery. Then, when you plug in the phone, you should see the battery symbol on the screen (I did), turn the phone on and IMMEDIATELY plug the battery in.
That fixed it. The only thing I should add is that in order to put the back cover on you have to turn the phone off. Then, put the back cover on, and turn it back off.
I also screwed up my antenna during my battery change (I accidentally knocked it off) so I simply taped it back on with a little piece of electrical tape.
juniper1982 said:
Actually, after googling, I found an answer on a youtube, so I should probably put it here.
I had to take off the back cover again, remove the internal protector, and disconnect the battery. Then, when you plug in the phone, you should see the battery symbol on the screen (I did), turn the phone on and IMMEDIATELY plug the battery in.
That fixed it. The only thing I should add is that in order to put the back cover on you have to turn the phone off. Then, put the back cover on, and turn it back off.
I also screwed up my antenna during my battery change (I accidentally knocked it off) so I simply taped it back on with a little piece of electrical tape.
Click to expand...
Click to collapse
Thanks for this tip. I will try tonight, hope it doesn't burn the smartphone :fingers-crossed:
Update: Bingo!!! It worked! Though my battery being recent, it has got completely drained and doesn't recharge anymore after replacing the screen. But the phone works when connected to power cord. I will buy a new battery again. Thank you again for your help.
So i recently picked up an XT1254 for a great deal. The phone is pristine, not a scratch on it. It looks brand new. It is totally unresponsive. If I plug it in the light on my charger turns from blue to green, telling me it's fast charging. But nothing from the phones LED. Also if I place it on a charging pad, color changes as well. I tried both options over night and still nothing. The phone does get warm (usual amount), leading me to believe it is charging the battery.
Holding the power button - nothing (no vibration, no moto logo, no LED responce)
Holding power + vol down - nothing ( = )
USB to PC - phone is not detected at all (I have ADB and current moto drivers installed)
I opened it up, and everything seems to be in order. No loose connections, no water damage. I checked the battery, and it reads roughly 2.5 volts across each pair of pins. Should it be reading 3.7-4 volts across each pair?
I unfortunately don't have another phone to check the MB, battery and LCD against.
I don't have a SIM installed in it, but I doubt it makes a difference?
Any ideas or advice would be greatly appreciated! Thanks-
alexacm said:
I checked the battery, and it reads roughly 2.5 volts across each pair of pins. Should it be reading 3.7-4 volts across each pair?
Click to expand...
Click to collapse
Quite low for li-ion/-poly, I don't think it ever sees 3v or under in normal circumstances. It might be well into "damaging the battery" territory at this point, and it should certainly be higher after charging it for a while...might be a goner.
Have you tried removing the battery completely and running it off the USB cord? I would expect it to, if nothing else, bring the screen up complaining of a bad/missing battery. That said, I've never tried unplugging mine to see what happens, so no real idea.
I would suggest trying to fabricate a factory cable (which would provide power directly, ignoring battery status), but I don't know if post-OMAP Motorolas are physically configured to use them. If they aren't, it'll do nothing at best and burn up traces at worst : \
Also, holding Vol - while plugging it in should bring the boot menu up, regardless of available battery charge (therefore serving as a quick test to see if the power button is the problem). But that might go out the window as well if the battery is deader than a doornail.
alexacm said:
I don't have a SIM installed in it, but I doubt it makes a difference?
Click to expand...
Click to collapse
It doesn't. When I fresh-install a ROM, I remove my SIM card to make sure none of my data gets used before I can turn various unwanted syncs/auto-updates off. The phone doesn't care at all, and nowadays Google isn't too whiny about a missing SIM either.
Hello guys.
Sorry for reviving an old thread, but I have similar problem with my Droid Turbo. During the replacement of the battery and speaker, I noticed oxidized resistors near the proximity sensor (which wasn't working since the purchase of the phone second-hand). I have cleaned the oxidized residue with ethanol and assembled the phone. After pressing the power button, the touch buttons light up and phone was vibrating every 20s but the screen was blank. So I disassembled it again to check all the connections but everything was fine. Since then, the phone won't even vibrate, just heats up a lot after holding power button. I have tried both batteries, speakers and also powering the phone without battery (only power cord connected). Both batteries are shoving around 3.8V.
Do you please have any suggestions how to fix the phone? Or should I assume that the motherboard died?
Thanks
I am having an odd issue and am seeking ideas on what to try next. Yesterday evening my GS6 in a tech21 case fell approximately 3ft from my basketball shorts pocket onto carpet. The phone was off at the time and had just been charging. Thinking nothing of the fall, I went to turn it on and it refuses to power on. I tried re-plugging it in assuming it might not have charged, and that doesn't seem to help either. I see no indication of charging (i.e. no screen indicators or LEDs) when plugged in. I plugged the phone into my laptop running Gentoo Linux and tailed messages but saw no indication of a device being connected which implies to me that it's not a broken LCD or a boot loop - the phone is literally just not turning on. Finally, I placed my phone on a OEM wireless charger at work and the charger pad LED indicates it's charging, but there's no indication on the phone screen or phone LEDs. To me this implies the battery has a charge, but something is preventing it from powering up.
I'm not sure how such a short fall in a case onto carpet would cause this. I have already tried doing a power + vol down and a power + home + vol up, neither seem to have any effect. I plan to take it apart tonight or tomorrow and am wondering if anyone has suggestions on which part(s) to focus on. I'm hoping (and I know it's a long shot) that just some internal cable got knocked out.
Hi,
I got a Z3 which was described as having no power and just flashing red LED when power button is pressed, after being dropped flat on the floor in a gel case.
The phone is in good condition with no external cracks or breaks and the only damage is the USB connector flap doesn’t stay closed.
I decided to take a chance on it thinking maybe the battery connector had come loose or similar.
When the volume up button and power button is pressed it vibrates 3 times.
When the off switch is held it also vibrates - but not every time.
When charger is connected the red LED sometimes comes on for 5 seconds then goes out.
When trying an a stiff apple type micro-usb lead, a couple of times I got a solid red LED. I left it on charging for 24 hours but the LED remained red and it was still the same - no power.
So I suspected maybe the micro USB connector may have damage.
Not detected by windows or Xperia/PC companion.
Sony Mobile Flasher just says “Device disconnected”.
So I decided to open it up.
It had previously been opened up and possibly the battery changed as is had horrible double sided sticky stuff holding the battery in and the back cover to the battery - cheap shop fix to avoid getting the proper adhesive seal?
The battery connector seems loose and I couldn’t be sure if it was connected properly.
The battery voltage was about 2.70v so I was thinking maybe below what would be correctly detected.
I decided to boost charge the battery for a bit.
At 3.30v I put the battery back in but the behaviour was the same - maybe the LED flashed red a few times at various points.
Any advice what else to try?
You help much appreciated.
Thanks.
try removing the battery plug in the phone to your pc and start pressing the power button rapidly if it gives a green or a blue light then your is phone is ok it might just be a battery problem but if not
You are in a heap of trouble
In most Cases the red light only cames on when there is somthing wrong inside the phone
it can be easy as a battery replacement
Or worse like mine it can be an Power Management IC that is shorting out due to lose or bad connections
Hope this helps