Please for advice! I had to replace the motherboard on my G2 D802, I think everything done correctly. After turning the phone on, the display remained black and refused to turn anymore. I put the old board with that previously loaded, but now it is the same result. I asked friend and took his board and ribbon cable (kit) - Alas, the result is the same, namely: pressing the power button, the phone vibrate briefly flashes the upper led diode green and blue - the screen is black. When is connected with the PC being recognized, even updating software in this state. I think the display has a problem or his ribbon cables .... I do not understand much. I hope someone advise me what I can do or where to read !!
Thanks in advance !
It's very possible that the ribbon cable broke if you weren't careful. If that's the case then it's not something you can fix and you would need a new screen. It could also be that you aren't seating all of the connections properly. Take it apart again and note ALL of the connector locations. While you're in there, VERY CLOSELY inspect every millimeter of the pcb and ribbon cables for damage. If you don't see anything, carefully reassemble it being sure to squarely lines up the ribbon cables before firmly seating them(you can mess up the whole board if you press on them too hard if they're askew).
I reviewed the cable but nothing impressed me. Because I am the second owner, assume that it is possible to display is not original, but some cheap fake. Is it possible this option ?? Attached pictures:
tishotch said:
I reviewed the cable but nothing impressed me. Because I am the second owner, assume that it is possible to display is not original, but some cheap fake. Is it possible this option ?? Attached pictures:
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From the pics, that display does not look like it's fake. The letters and cable itself looks to be identical to the one I took out when replacing my screen. If it worked fine before taking it apart, it should still work with the new logic board.
Btw, when I was replacing my screen I didn't correctly seat one of the two ribbon cables that go across the battery and my display was also black even though the display cable itself was correctly installed. After taking it apart again and methodically taking note of every connector on both sides of everything and very carefully putting it back together, it fired right up. That's why I said to check EVERYTHING - it doesn't necessarily have to be the display/cable.
Good luck.
Related
Before anyone jumps on me, I've been going through the Wiki and forums extensively, and found just one similar problem. Which wasn't solved...
My HTC TyTN/Hermes 200 won't boot up anymore. It is totally dead. I even can't get it into bootloader mode. Screen stays blank and the LED is off.
Put the (3 months old) battery in another Hermes to test it, and it's at 100% charge.
My Hermes shows a steady red LED when it's plugged into power without the battery in, and no LED at all when the battery is installed. The red LED turns off when the battery is installed while there's power going into the unit.
I've left the battery out for at least an hour, plugged it back in, same results. Like the other guy I tried the "pull power, pull battery, plug in power, plug in battery, reset" trick http://forum.xda-developers.com/show...6469&p=1077622 - to no avail.
Does anyone have any last resort ideas on how to get it to at least come back up to a boot loader screen ?
check the battery contact points on the phone. the hermes shows a red led when its plugged in but without a battery
... have you ever dismantled your hermes? your screen ribbon cable may have dead tracks or not be connected properly
just a test on the opposite side of the battery connectors with battery removed press firmly without putting pressure on the LCD, this worked for me when i had a white screen on power up.
if this fixes the problem you may need to actually dismantle the back and put some flame retardant electrical tape on the back over the existing tape to add an extra layer of pressure and retension
XtreMe_G said:
check the battery contact points on the phone. the hermes shows a red led when its plugged in but without a battery
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Yes, I have cleaned the contact too, nothing. And the battery is OK for sure, my colleague's TyTN runs on it without any problem.
Mattnokis said:
... have you ever dismantled your hermes? your screen ribbon cable may have dead tracks or not be connected
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In fact I have, I have totally dismantled and reassembled my TyTN yesterday afternoon, nothing.
the only other problem may be that when being dismantled you may have damaged some sensitive components, Electro Static Discharge will fry sensitive CMOS components, they do not like it at all, whenever dismantling you should wear an earth strap, any time i dismantled mine it was on a workbench with a static mat and i was earthed through the mat.
but this is one possibility, the only other idea is to swap main board and displays with another that works, finding someone willing to allow you to do this with a working hemes is the tough part.
thats as much all i can think of for now
R.I.P. my trustful Hermes 200
Thanks all for your assistance. I have come to the conclusion that my sweetheart is no longer among us. May she rest in peace.
I have obtained a (2d hand) replacement yesterday. May this one last longer.
I'll keep the old TyTN for replacement parts.
Oh well...
Hi everyone,
I sat down with my Nook in my back pocket today, and when I got up it was frozen on the startup screen, displaying "Nook by Barnes & Noble" and 5 dots with the first filled in. Since then the screen has not changed no matter what I do.
The device is responsive in two ways. Firstly, when plugged into a computer, the contents of the My Files and screensavers folders are visible and interactive. Secondly, when plugged into a computer or wall socket, the charging light comes on orange, and if the power button is held down for 10 seconds it turns green briefly, then goes back to orange. No change whatsoever is observed on the display, not so much as a flicker.
So, that being the case, any suggestions for fixing it? If the current display cannot be salvaged, is it worthwhile to try to buy a dead unit and Frankenstein a functional Nook? If so, how much could I expect to pay?
Thanks in advance!
New NSTs are currently going for £30 in the UK, so I'd put that at the top end of what to pay for a used one.
There's a 0.01% chance that the display connector needs to be reseated.
Open up your Nook and try reseating the connector.
Thanks! I'll go ahead and try reseating the display connector as soon as I can find a T5 screwdriver.
My Nook gets display frozen as well
My Nook Glowlight is in the exact situation as the OP.
I tried to reseat the connector to the screen on the mainboard by opening the rear case, no luck.
Any suggestions?
update: I replaced the mainboard with the one from my fathers, who has the same glowlight, it works. So it seems something is wrong on my own mainboard, not the whole main board though. Have no idea where to fix it.
I have a same issue with Nook Touch...its stuck half on "connect to charge" screen and only 25% display is working. Is there any guide on reseating the display connector?
Reseating the display connector is only a shot in the dark.
I don't think that that is the problem, but it would be stupid if it were.
There could be many things that cause the display to die.
Power circuitry is always suspect and the eInk uses higher voltages.
viny2cool said:
I have a same issue with Nook Touch...its stuck half on "connect to charge" screen and only 25% display is working. Is there any guide on reseating the display connector?
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Did you solve it, i have the same issue.
Hey guys.
Basically I've recently replaced my whole screen assembly on my Nexus, but it turns off after a few seconds when it's not on charge.
Sometimes it'll last about a minute but will instantly turn off. I've tried a factory reset and it still does the same thing.
I've bought a replacement battery, just making sure that there's nothing else wrong with the phone? any advice etc would be appreciated.
Thanks.
If it started after you replaced the screen, then its likely that something isn't seated properly on the inside. I changed my screen too, so have a look at the battery connector and the connector that connects the bottom board (the one with the charger port) to the top one.
raze599 said:
If it started after you replaced the screen, then its likely that something isn't seated properly on the inside. I changed my screen too, so have a look at the battery connector and the connector that connects the bottom board (the one with the charger port) to the top one.
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It was doing it before I changed the screen.
Rebdomine said:
It was doing it before I changed the screen.
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In that case it probably is the battery. New one should fix it.
I'm unsure if I'm having the same problem as a person who decided to replace his screen assembly had, but I'm in a situation where I can't tell if it's a software issue or a hardware one.
I've checked the cable under the battery and everything looks great, it even reseats just fine. the other ribbons are plugged in just fine...
I'm not sure where to begin, please help!
Any thoughts at all? I banged my head against a wall all night!
kroenem said:
Any thoughts at all? I banged my head against a wall all night!
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I can't imagine it would be software if it was working before you took it apart. My first thought would be dinged ribbon cable under the battery of course but you said its fine. You could check terminals on motherboard and ribbon cable with a magnifying glass or camera on zoom mode to make sure nothing got bent and no debris got into the connection when reassembling. Not the first time I've seen someone damage the display when replacing a battery on this forum unfortunately. There's a few cases of this in the oem battery thread.
hawkswind1 said:
I can't imagine it would be software if it was working before you took it apart. My first thought would be dinged ribbon cable under the battery of course but you said its fine. You could check terminals on motherboard and ribbon cable with a magnifying glass or camera on zoom mode to make sure nothing got bent and no debris got into the connection when reassembling. Not the first time I've seen someone damage the display when replacing a battery on this forum unfortunately. There's a few cases of this in the oem battery thread.
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Thanks for the heads up.. the cord and connector look just fine
kroenem said:
Thanks for the heads up.. the cord and connector look just fine
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Sure does look fine. The only thing I notice is the debris or whatever it is on the solder pads halfway down the left hand side in the motherboard picture, it's in two spots. I wish you luck.
Nope! nothing
Mine had a problem of a pink hue after the battery replacement I did, I'm pretty sure it's because I separated the screen and LCD a little at one time..oh well least it don't die randomly
hawkswind1 said:
Sure does look fine. The only thing I notice is the debris or whatever it is on the solder pads halfway down the left hand side in the motherboard picture, it's in two spots. I wish you luck.
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Sooo I got another (Broken) nexus 6p for $30 off ebay and swaped the motherboards. I plugged it in and got a red flashing light - I then replaced the battery with my new one and all that happens is when I plug it in I feel a vibrate. I try to turn it on and it vibrates... exactly like the problem I had before. Ugh, it must be the socket (? I think that would be the term) and not the screen. hm.
kroenem said:
Sooo I got another (Broken) nexus 6p for $30 off ebay and swaped the motherboards. I plugged it in and got a red flashing light - I then replaced the battery with my new one and all that happens is when I plug it in I feel a vibrate. I try to turn it on and it vibrates... exactly like the problem I had before. Ugh, it must be the socket (? I think that would be the term) and not the screen. hm.
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The phone you bought had a bad motherboard and good screen assembly? Anything come on screen if you hold power and volume down buttons simultaneously for 5+ seconds? Or hold volume down while plugging it into a computer. Any joy if you install your original battery from original 6p? Kind of lost without being able to see it. Just throwing out some ideas.
I have your same problem... did you solve it?
I have a bricked NGL 3 with a perfect screen, and a non-bricked NGL 3 with a very slightly defective screen. I toying with the idea of removing the perfect screen from the bricked NGL 3, and putting it in the non-bricked NGL 3.
I watched a video on how to do it with a Kindle. It seems simple enough. Open it up, remove screws from mboard, unclip or unplug any connectors, pull out mobo, pull out screen, insert new screen, then put everything back.
I'm a little uncertain how to remove the plugs and ribbon cables. I don't want to force anything when it's not meant to be.
I've attached an image with the plugs ringed in red. Any advice on how to undo and refasten the plugs, and any other advice would be appreciated. I guess I don't have to undo all the plugs.
The image tag doesn't see to work, so here's the link to it.
https://ibb.co/Wy6S3xm
and another in case that doesn't work.
https://imgur.com/a/fLqolIE
All the flex printed circuit (FPC) connectors have a little flip-up retainer on the far side.
You just need to slip a fingernail under it to pry it up.
When reinserting, make sure that the FPC is inserted fully.
That's what the little white line is for.
Then push down the retainer.
The battery connector in white is a bit the same, you just have to pry the far side up gently.
When reinserting, mate the near side, then push down.
If you are swapping displays, the optimal solution is to adjust the Vcom voltage (which might be different).
Look at the little tag, it says something like -2.25.
Don't worry, it's not a biggie, you can do it later.