Hey XDA, a quick question, what part of a phone connects the display to the board?
With the back of the phone facing you, the LCD cable connects to the motherboard connector located in gene upper right hand corner. Not sure if this is what you wanted to know.
its on the bottom flex, display+digi is connected on that flexible board thag connects to the logic board near the camera, but that flex is so ****ty and after a few reconnections ull eventually break the flex tray and ull have to hotfix it with tape and plastic, be careful.
Sent from my Nexus 5 CAF using Tapatalk
It's one the bottom? I know there are two connections at the bottom of the motherboard but isn't one for the battery and the other is for the USB charging port, speaker, mike, etc? When I replaced a screen, I had to transfer the USB charging cable to the new screen.
audit13 said:
It's one the bottom? I know there are two connections at the bottom of the motherboard but isn't one for the battery and the other is for the USB charging port, speaker, mike, etc? When I replaced a screen, I had to transfer the USB charging cable to the new screen.
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right, and that one also connects disp+dig with the mobo, if u dissasembly the plastic bumper at the bottom ull find two antennas, one by side, a mic, the speaker and the screen & touch connector
Sent from my Nexus 5 CAF using Tapatalk
Gosh I hated having to replace my screen, it was a nightmare!
Related
Alright; so the connector where you plug in the ribbon cable for the mic, the white fastener that
acts like a breaker decided to fly off so my mic doesnt work. If I put solder in the area where the
fastener was; will that make the connection work and therego make my mic work again? I really
don't want to buy a new mobo, I just bought a new lcd and digitizer...... response asap would be
greatly appreciated!
Wanderer_Zero said:
Alright; so the connector where you plug in the ribbon cable for the mic, the white fastener that
acts like a breaker decided to fly off so my mic doesnt work. If I put solder in the area where the
fastener was; will that make the connection work and therego make my mic work again? I really
don't want to buy a new mobo, I just bought a new lcd and digitizer...... response asap would be
greatly appreciated!
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Not unless you can solder the individual cores of the ribbon cable back onto the right place on the motherboard, no.
I recently replaced my digitizer on my inspire 4g with great success :laugh:, but now my volume button is broken and i have no Wifi :crying: . I am going to go back in and check the connectors, i just wanted to see if my fellow xda users had any similar problems. how much is a new volume flex cable and where is the wifi connector? I have heard that the wifi antenna is the battery door but what about the connector? also when i removed the black square tape covering my mother board there was a bronze metallic sticker underneath that NO One warned me about hence my now broken volume cable, what the heck is it?
Doughboyzilla said:
I recently replaced my digitizer on my inspire 4g with great success :laugh:, but now my volume button is broken and i have no Wifi :crying: . I am going to go back in and check the connectors, i just wanted to see if my fellow xda users had any similar problems. how much is a new volume flex cable and where is the wifi connector? I have heard that the wifi antenna is the battery door but what about the connector? also when i removed the black square tape covering my mother board there was a bronze metallic sticker underneath that NO One warned me about hence my now broken volume cable, what the heck is it?
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hi when you open the phone you must take the volume flex first because if you dont you break other pieces you dont see now you must put a little piece of flex between the the bottons and the flex and try to press to if works then you put the sticker again so the plastic will not fall that happend to me and thats how i resolve the issue... and the wifi check the antenna to see if is disconected i have open a few phones but never had that happend
OK it took me forever but I finally replaced my volume flex cable and now everything is working except the volume down button! Upon further inspection I noticed "electric conducting paint"(similar to the paint on the battery door,simcard and GPS covers) on the interior of the volume button at the top and bottom. on the bottom where the down button touches the flex cable this "paint" has faded thus no volume down. Can I buy this type of paint? I tried a piece of foil but its to tedious to install.
Sent from my Inspire 4G using xda app-developers app
I took my TF700 apart last night as the digitizer was not working following a drop and assumed that a cable had come loose.
Anyway, made a mistake while doing it.
I could not disconnect the cables between the LCD and digitizer and the connectors.
I since realise that there is a small white bar that you flip up. I presume I have "broken" the connectors or something as the tablet works fine when plugged into HDMI, but I cannot use the digitizer and the screen does not come on.
Any suggestions? Most that I have found have suggested "throw away and buy again as spares too much", but wondered if anyone had a bright idea.
I have found why the digitizer was not working, there is corrosion over the SD card and around the top connector to the digitizer nearest the SD card slot. It looks like mositure/drip got into the slot and may have shorted something? I have cleaned off the surface debris as much as can.
Anyway this would not impact the LCD which still displayed (until connector concern.)
Following that, is anyone getting rid of their TF700 and would be interested in selling it at a sensible price?
Thanks
If you didn't pull that white bar off or break it, it could possibly be that you have not properly inserted the ribbon cable and fastened the connector. I would open it again and check this before I did anything else.
Most of them work like this:
Open it by pulling at each end of the white bar until it moves foward a little, then gently lift it to about 45 degeres and the cable slides out with a slight tug. Putting the cable back in is the reverse. That bar has to be loose and at about 45 degrees to get the cable back inside the connector. Make sure the end of the cable is in straight and close the connector. Cable should be tight and not come out if you gently tug it.
The OP here may be willing to sell a likely brick:
http://forum.xda-developers.com/showthread.php?t=2769818
flhthemi said:
If you didn't pull that white bar off or break it, it could possibly be that you have not properly inserted the ribbon cable and fastened the connector. I would open it again and check this before I did anything else.
Most of them work like this:
Open it by pulling at each end of the white bar until it moves foward a little, then gently lift it to about 45 degeres and the cable slides out with a slight tug. Putting the cable back in is the reverse. That bar has to be loose and at about 45 degrees to get the cable back inside the connector. Make sure the end of the cable is in straight and close the connector. Cable should be tight and not come out if you gently tug it.
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Thank you for the suggestions, I have tried that, but none of the 3 connectors (2 for digitizer, 1 for LCD) respond. I connected it to the HDMI, but cannot see the screen respondin to my finger (maybe that is broken also ha ha)
Is it more likely the connector, or cable is broken? I suspect connector pins to be honest. Abit small for me to see though.
Digitizer or Ribbon Cable or ZIF socket ??? How to tell ???
dilfred said:
Thank you for the suggestions, I have tried that, but none of the 3 connectors (2 for digitizer, 1 for LCD) respond. I connected it to the HDMI, but cannot see the screen respondin to my finger (maybe that is broken also ha ha)
Is it more likely the connector, or cable is broken? I suspect connector pins to be honest. Abit small for me to see though.
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Greetings!
Just curious how this problem worked out? I too have a TF700 with a working screen but no digitizer. Some time back during my first battery replacement (another story) I tried (we ARE a curious species you know) to open the ZIF socket for the digitizer cable (has twin, gold ribbons) and accidentally flipped the wrong side... needless to say it did NOT flip open. The black plastic top of the socket broke off exposing a little of the ribbon. Everything still worked fine so I counted myself lucky and closed her up and all was good.
Unfortunately I'm never willing to leave sleeping dogs alone and I attempted to replace the 2nd dud battery with yet another one (don't ever trust those "Brand New" eBay batteries)! This time I must have accidentally pulled on a ribbon cable a bit too much. When I closed up the tablet I ended up with a tablet just like yours... everything works great... just not with my finger! I opened it up AGAIN... to replace the original battery... you never can tell you know... while I was in there I tried reseating the digitizer cables (both sockets)... no luck.
So... now what... I'm hearing that some folks had their digitizers fail after about a year anyway... mine is two years old... so my digitizer COULD have just failed... or it COULD have been my messing with the ribbons and/or ZIF connectors. How to tell ??? Is there ANYTHING one can do short of ordering a replacement ZIF socket PC board ($25 eBay) and / or ribbon? With a two year old device I'm reluctant to spend much on repair... ASUS wanted $184 to fix it... and buying an eBay digitizer or ZIF board on the blind chance that one or the other is the problem seems a bit risky.... to say nothing about the chance of mucking up the heat separation of the LCD/digitizer! What's a digital explorer to do???
The only thing I was unable to determine was where does the forked golden digitizer ribbon cable GO on the glass end. Does THAT end ever come loose? How does it attach to the digitizer? Anything I could "fix" on that end?
Hi guys. This is gonna sound awkward. I'm having issues in my personal life and I was talking on whatsapp with brother when I got angry and threw my nexus. the screen is broken like colors and stuff and lines so I tries to turn the phone off by touching where the power off button appears on screen butI couldn't.
since I was angry I removed the back cover and cut the golden wire at the bottom point where it turn. I've tried turning it on by holding the cut ends but no luck. tried charger too but nope. All I wanna do is get into recovery somehow (TWRP) and dump my internal storage.
Thank you.
After some thought about your description.... I wonder if you have actually cut the main ribbon cable from the microphone/speakers/USB assembly this is the one that runs down the side of your phone. your best bet will be to purchase another cable assembly.. since you are dealing with a multi conductor ribbon cable.
I really doubt that you will be able to repair and re-connect the cable without some pretty highly skilled soldering ability.
The battery cable is very short and comes directly out of the battery itself... it is not likely that you actually cut it but did cut the main circuit cable. Too Bad, but this will be a real problem for a repair.
no joy... but you might want to investigate a reputable repair shop.
paultbear said:
After some thought about your description.... I wonder if you have actually cut the main ribbon cable from the microphone/speakers/USB assembly this is the one that runs down the side of your phone. your best bet will be to purchase another cable assembly.. since you are dealing with a multi conductor ribbon cable.
I really doubt that you will be able to repair and re-connect the cable without some pretty highly skilled soldering ability.
The battery cable is very short and comes directly out of the battery itself... it is not likely that you actually cut it but did cut the main circuit cable. Too Bad, but this will be a real problem for a repair.
no joy... but you might want to investigate a reputable repair shop.
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Thanks so much for replying. Yes indeed I cut the ribbon cable. I'm in no position of buying a new one. I guess I'm gonna take it to someone with high soldering skill. Before that I'm gonna try tape too
Xami said:
Thanks so much for replying. Yes indeed I cut the ribbon cable. I'm in no position of buying a new one. I guess I'm gonna take it to someone with high soldering skill. Before that I'm gonna try tape too
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Question: if this ribbon isn't battery wire then why the phone doesn't start
main connection cable ( do NOT cut)
Xami said:
Question: if this ribbon isn't battery wire then why the phone doesn't start
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Click to collapse
That ribbon cable is the one that interconnects the working boards in your phone, Microphone, Speakers, buttons. Unlike the battery cable you probably won't be able to fix it... it is pretty much a replacement only part.
this part is called -- LG Nexus 5 D820 D821 Charging Port Flex Cable Dock Connector USB Port With Mic Microphone Flex Cable Repair Part (amazon.com)
you will have to source a supplier close to you... but the good news is that it is relatively inexpensive... Ebay has it listed for $10USD or so.
not trying to be the bearer of bad tidings... but I've spent 20 odd years repairing computers and associated devices. It is always best if you don't cut ribbon cables.
So I bought a second hand Nexus 5 with a defective spekaer (the one for making calls) and microphone. I wanted to fix it so I bought replacement parts from Aliexpress (the earpiece speaker and the charging flex cable since that is what the microphone is connected to). When I had repleced them the screen wouldn't turn on anymore.. It stayed black no matter what I did. I noticed there was some backlight though.. I noticed some things:
1. It vibrated when I turned it on.
2. It gave a low battery notification sound when it was finished booting.
3. My computer plays the sound like it detects something when I connect it but nothing appears in explorer or device manager.
I tried putting the old flex cable in but that didn't work..
What could I try?
Look carefully at the connections on the motherboard and the connecting cables to see if there are any damaged parts.
audit13 said:
Look carefully at the connections on the motherboard and the connecting cables to see if there are any damaged parts.
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Nope I checked that
Look in the attachement to see how everything is connected..
Maybe something happened when you were changing the flex cable as that seems to be the only explanation since the screen doesn't work with the original and replacement part.
audit13 said:
Maybe something happened when you were changing the flex cable as that seems to be the only explanation since the screen doesn't work with the original and replacement part.
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What could be damaged then?
First thing that comes into my mind is that you did not/forgot to connect the LCD flex cable or the lcd cable is broken or the lcd is broken.
The backlight and the lcd display should be two separate things, 1 might work but the other might not.
You can try tapping on the screen to see if anything happens to it or try to call your phone and see if you can pick up the call.
Also, did it work before you change the cables? are you sure the microphone and speaker are the only thing broken in the phone?
ck.chunkeat said:
First thing that comes into my mind is that you did not/forgot to connect the LCD flex cable or the lcd cable is broken or the lcd is broken.
The backlight and the lcd display should be two separate things, 1 might work but the other might not.
You can try tapping on the screen to see if anything happens to it or try to call your phone and see if you can pick up the call.
Also, did it work before you change the cables? are you sure the microphone and speaker are the only thing broken in the phone?
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I will try that. I just plugged it into my pc to charge it and it detected it and showed it in the device manager. This is without the plates over the PCB's, I don't know if that matters..
Yeah I tested it before I took it apart and it worked fine except for the speaker and microphone.
The cable leading from the motherboard to the LCD is in the upper right hand corner of the phone, near the headphone jack.