Hello guys, i need help to understand problem.
I bought new lcd..because my old one cracked. The process of change run smooth.. But when i turn on phone my capacitive buttons doesnt react. The lighs turn on when phone Boots and shutdown.
So my questions are:
-can be lcd defective?
-only thing that comunicate is lcd flat cable connect to mainboard?
-buttons zone are controlled by dÃgitizer right? Or are releatd with power board where buttons are?
Any opnion will be welcome.
Ps. Sorry my engish but is not my native language
I had kinda same problem with my S6. In my case it was a faulty USB Board(But it fixed itself..) I guess You could try discharging Your phone until it barely can boot. Leave it for a day, and then charge it from 0 to 100%. If that doesn't work, try flashing stock rom with ODIN, or blowing air into Your USB Port(This fixed my friends Xperia phone with fault USB port). And if none of those work.. Try getting a new USB Board and it should fix that. Or make sure that the cable that connects USB Board to motherboard is seated properly and optionally check if capacitive buttons are close enough to digitizer/display.
Anyone can explain how it works this 2 things toghther?
Is digitizer of LCD that control and two buttons only give light or all work is given by two buttons and lcd only have the draw to let show light?
Related
New Problem :
Please see post #10.
Old Problem ( solved ) :
Hello,
I had told my problem in this thread but got no response so had to create a new thread to see if someone helps.
My problem ( I mean my fuze's ) is :
Firstly my fuze was having few scratches and the digitizer was broken lil in the edge/corner so I thought to replace its digitizer.
Brought new digitizer ( 2 months back ), disassembled the device and while removing the flex cable, broked its buttons strip ( volume and ptt button ) and while removing/separating lcd from digitizer, I destroyed both!
So next I brought new lcd and flex cable. Stupid seller sent touch pro flex cable instead of fuze. Had it return it and the fuze flex cable is on way now.
In the meanwhile, I tried to install new lcd+digitizer and damaged flex cable but I'm getting only backlight and no display/image. Sometimes I get thin RGB/rainbow vertical lines and once or twice I got the display/image too. As the adhesive conductive tapes/fabric/stickers got weaker I brought new copper conductive tape ( Like this ) and sticked them but still I'm not getting display/image and only backlight.
I'm very fedup and stressed about this although spent 100$ and Due to this, I able to cook roms and I'm out of xda dev since 2 - 3 months :'(
If someone could help, you will be greatly appreciated. Please please help!
I don't have money to buy new device either and have no mobile phones to play with since from fuze is dead.
Thanks a lot in advance....
Best Regards
I replaced the lcd in my phone and had the same problem. I later discovered that I didn't have the ribbon connector in all the way. I hope this helps.
you need a working flex cable...the same thing happened with but on a nokia n95...the blacklight was comin but no display changing the flex helped
Cingularman said:
I replaced the lcd in my phone and had the same problem. I later discovered that I didn't have the ribbon connector in all the way. I hope this helps.
Click to expand...
Click to collapse
I'm not a mobile tech.., could you please let me know what/which is a ribbon connector?
Thanks for the help though.
djteotancolis said:
you need a working flex cable...the same thing happened with but on a nokia n95...the blacklight was comin but no display changing the flex helped
Click to expand...
Click to collapse
But had it working once and twice. However, I will get new flex cable in few days.
BTW; I had also tried the new touch pro flex cable and had same issue.
Thanks for the help though.
Best Regards
CRACING said:
I'm getting only backlight and no display/image
Click to expand...
Click to collapse
Hi
I had the same problem last night (wasted 3 hours). Just replaced my LCD as well, broke digitizer was a problem. Anyway, after taking a phone a part 3 time figure out what the problem was.. The two ribbon cables have to touch (mostly likely a ground).. The LCD one and log flex one.. I will try to find you a picture..
Now I have a different problem, can't align the screen properly. The right side on screen is way off.. What a mess..
Green
sadik007 said:
Hi
I had the same problem last night (wasted 3 hours). Just replaced my LCD as well, broke digitizer was a problem. Anyway, after taking a phone a part 3 time figure out what the problem was.. The two ribbon cables have to touch (mostly likely a ground).. The LCD one and log flex one.. I will try to find you a picture..
Now I have a different problem, can't align the screen properly. The right side on screen is way off.. What a mess..
Click to expand...
Click to collapse
sadik007 said:
Green
Click to expand...
Click to collapse
I tried everything but didn't got it working. Though I have doubt on original flex cable that I broken while removing.
I have trouble with getting new flex cable on ebay. First the seller sent wrong flex cable ( TP's which it doesn't fit for fuze ), 2nd time the flex cable lost in shipment and 3rd the seller didn't had stock to resend so refunded.
Now I have brought the flex cable from different seller and its about 14 days and not yet received.
When I tried touch pro flex cable I didn't get the display but only backlight but once or twice I saw the display so I think it was something wrong in my connect. However I didn't had much time to test the device using touch pro flex cable because I had to return it!
This is what I'm playing with my device since 4+ months. Mostly waiting waiting waiting......
Thanks...
Best Regards
I can see that ribbon hold contact.
obaz said:
I can see that ribbon hold contact.
Click to expand...
Click to collapse
The ribbon aka conductive tape/sticker I have is no longer usable. Its adhesive gum is too weak and no longer sticks. I have searched lot to find such conductive tape/sticker and found copper conductive tape/sticker. Using it now.
@sadik007 and all
I got the flex cable today and after testing, I' getting same problem. No display but only backlight. I see some minor rainbow lines which haven't saw before but as said, I checked the grounding and everything seems correct.
Fed up of this and desired to sell it as parts or repairable...
Best Regards
Finally my fuze is back alive.
Got Correct Flex cable and new LCD. Now its working perfectly.
However, a minor problem if anyone can help.
The brightness setting of LCD in settings -> System -> Power -> Backlight seems to work only till 40% and then after it doesn't increase the brightness of the lcd.
In auto mode, its same. I think the brightness is working only upto 40% and then it doesn't increase.
Cannot understand whats but I guess its because the seller gave me diamond lcd instead of touch pro/fuze. As I can see, diamond lcd doesn't have variable resistor and my friend say its a brightness setting.
But the hardware setting should be atleast full and we could decrease through software.
Can body help me how to solve this problem? I guess its not possible.
P.s the brightness from 0% to 40% is not bad to use but may have trouble in sunlight.
Thanks a lot for all your helps...
Best Regards
p.s My problem is something like this but the backlight is working fine.
Edit;
I don't think my FUZE stops giving troubles. New problem started since last night and today.
As the backlight was lil dim on sun light, I went to try Lumos app. Didn't saw any difference, just sucked at 40%
Today when I booted my fuze morning, it started to do some malfunction in LED lights ( LCD backlight and front penal keypad backlight light ). Backlight of keypad is no longer working when pressed its button but buttons work fine. And also if I slide out the hw keyboard, the home button backlight turns ON. and also the d pad circular light and back button backlight.
Cannot under stand what the hell is going on. If I get any SMS or EMail, d pad circular light rounds fine but if I connect USB to charge, d pad circular light doesn't work.
I removed the Lumos app, softrebooted, hardrebooted, and reflashed but still same problem.
Any idea?
I guess I'm stupid or the device is fooling me.
Thanks again...
Best Regards
Bump...
I don't think my FUZE stops giving troubles. New problem started since last night and today.
As the backlight was lil dim on sun light, I went to try Lumos app. Didn't saw any difference, just sucked at 40%
Today when I booted my fuze morning, it started to do some malfunction in LED lights ( LCD backlight and front penal keypad backlight light ). Backlight of keypad is no longer working when pressed its button but buttons work fine. And also if I slide out the hw keyboard, the home button backlight turns ON. and also the d pad circular light and back button backlight.
Cannot under stand what the hell is going on. If I get any SMS or EMail, d pad circular light rounds fine but if I connect USB to charge, d pad circular light doesn't work.
I removed the Lumos app, softrebooted, hardrebooted, and reflashed but still same problem.
Any idea?
I guess I'm stupid or the device is fooling me.
Thanks again...
Click to expand...
Click to collapse
Same problem.
Backlight setting changes only 1-4 interval and does not brighten 5 and more.
I had heard that problem one sells his tp which's lcd replaced.
Options:
1) while replacing, flex can be damaged. I do change screens for 6 years and hard to beleive it.
2) keypad membrance can be damaged while replacemnt of lcd. More harder than option 1.
3) eBay sellers sells fake lcd screen.
I handle over 5 diamond and tp screen far away and still keep some cracked ones. They all different from each other. Somehow there must be different versions of these lcd's.
By the way I also tried a diaond lcd and it gives same error.
first 4 step is ok but no more 5 to 10 steps working.
Problem was solved:
HTC P3700 LCD and P4600-T7272-touch Pro LCD screens are different.
here is the differences illustrated on photos:
@sokomind
nice find. Yeah I do see the changes from touch pro lcd and diamond lcd. touch pro lcd has 10 led levels and diamond has only 5.
Part No :
Diamond LCD with 5 LED brightness levels : 60H00130-00M
Touch Pro LCD with 10 LED brightness levels : 60H00129-00M
29 is what we need for Touch Pro but in ebay sellers don't know the difference of these lcds. They ship what ever stock they have. I had requested to send Touch Pro LCD and also said the part no but they sent the diamond LCD.
Damaged 3 times in shipping and when I got the working one, it was diamond lcd.
Anyways, now I'm using the device has a 3g data card and 3g router. Working g8.
Thanks...
Best Regards
I still have the problem as #"10 cracing.
I got a diamond lcd and then ordered a touch pro lcd.
Yes TP LCD is brighter but it is still working 4/10 on brightness. And then I see that my flex cable has lost one of the way. I try to fix it but it still give me 4/10. I do not know if it fixs a new flex. I do not want to spend $20 more.
Have you spare TP flex not fuze?
Hey guys,
i have a T-Mobile SDA with HTC Tornado 6.5 23001 Professional WWE ROM installed. yesterday i received a call and after a few mins i checked the mobile it was switched off (never happened before) and then it wont turn on .. no light no charging nothing .. please guys help me out with this .. it wont even go into boot screen ... it was working fine
Dead battery - almost sure.
tobbbie said:
Dead battery - almost sure.
Click to expand...
Click to collapse
The battery is fine. I had one more Tornado device the same happened with it stopped working the same way i replaced its battery but it didn't worked.
Oops - I hope there is no sudden death disease for the Tornado?! The only part that is usually mechanically stressed is the USB socket. If you dare to disassemble the device and you get through until you have the PBA in your hand, then you may check for the soldering around the USB. It is a plain normal mini-USB with only 5 connections, so re-soldering is not that difficult for a skilled person. It is worth a try - as it seems dead anyway.
Take care about the keyboard connector - of all the Tornado patients I had on my table most had their keyboard flex cable ripped - this cannot be repaired and you need a new keyboard PBA.
tobbbie said:
Oops - I hope there is no sudden death disease for the Tornado?! The only part that is usually mechanically stressed is the USB socket. If you dare to disassemble the device and you get through until you have the PBA in your hand, then you may check for the soldering around the USB. It is a plain normal mini-USB with only 5 connections, so re-soldering is not that difficult for a skilled person. It is worth a try - as it seems dead anyway.
Take care about the keyboard connector - of all the Tornado patients I had on my table most had their keyboard flex cable ripped - this cannot be repaired and you need a new keyboard PBA.
Click to expand...
Click to collapse
Its no trouble for me to disassemble the device. I'll check it right away, and thanks for quick reply's
The USB looks fine, but i'll get it re-soldered from the market tomorrow. I hope it works Thanks for your help tobbie =)
That's strange - if it looks ok there. Maybe the battery connectors then? Usually these are not much stressed - so I have no other idea. Good luck!
tobbbie said:
That's strange - if it looks ok there. Maybe the battery connectors then? Usually these are not much stressed - so I have no other idea. Good luck!
Click to expand...
Click to collapse
hmmm lets see i've sent it for repair i hope it gets repaired ... Thanks for you help
@tobbbie
Hey, i checked the other Tornado device i have, i think its got the problem you mention that USB one, if i exchange the usb port of one device onto other will it work?
this one can go itno the bootloader screen too, and if i switch it on the T-mobile screen comes and it keeps restarting.
Re-soldering works if the contacts are gone off the PBA. This could be any of the USB contacts (+,-, data-wires - in total 5 connections + metal frame of USB) with different effects (not charging, not syncing). Restart should not be an effect - do a hard reset on that device (l+r softkey method when switching on). If that does not help, then flash a new OS only. Do not deal with flashing the bootloaders (i.e. a standard flash image) - if you mess anything there (because of USB problems) - the device will be dead.
Taking another USB should not be necessary. This can hardly break and removing it from both PBA may ruin the PBA and the USB socket - so permanently killing both.
tobbbie said:
Re-soldering works if the contacts are gone off the PBA. This could be any of the USB contacts (+,-, data-wires - in total 5 connections + metal frame of USB) with different effects (not charging, not syncing). Restart should not be an effect - do a hard reset on that device (l+r softkey method when switching on). If that does not help, then flash a new OS only. Do not deal with flashing the bootloaders (i.e. a standard flash image) - if you mess anything there (because of USB problems) - the device will be dead.
Taking another USB should not be necessary. This can hardly break and removing it from both PBA may ruin the PBA and the USB socket - so permanently killing both.
Click to expand...
Click to collapse
hmm that means i need to get the USB repaired and flash a new OS.
i've got soldered a new USB onto the PBA from the market not the problem is that The phone restarts after the first bootscreen. and if i connect it with the pc for flashing the terterm pro doest detects it. And if i try the hard reset the reset screen comes but turns off automatically. Now what to do =(
Seems like you need to bury that device - or keep it for spare parts :-(
aj2020 said:
this one can go itno the bootloader screen too, and if i switch it on the T-mobile screen comes and it keeps restarting.
Click to expand...
Click to collapse
It's probably ROM problem, if your phone restarts on T-Mobile screen. Try HardReset from bootloader mode, or reflash your phone
damn
@gutek85
how do you hardreset in bootloader mode ?
Hello Fellow Forum Users and Gurus
I need some serious advice in regards with my Xperia Play R800i. I have had this phone for over two years now and have taken it in for servicing before (just for cracked digitizer, feel like I paid way more than I should have since digitizer costs a fraction of what I paid and is quite easy to install) and now I have an even bigger problem:
> My Xperia Play's flex cable wore out and my touchscreen was no longer responsive; in addition to this, my face buttons (home, search, menu, back).
> I purchased a new flex cable and had it installed - the face buttons work, but the screen does not display anything - my phone would flash a purple light and vibrate. Icing on the cake is that once I turn on my phone, the phone and battery start getting real hot within minutes.
Also, whenever it doesn't power on the LED flashes red (insufficient power going to phone? Hardware failure?)
> I decided to have a serviceman assess my phone, see if the cable was set in properly - he came back to me and said that there may be possible liquid damage that could have occurred before and only now presenting itself since I changed the flex cablethough this seems highly unlikely:laugh:.
> Tried to boot into fastboot and flashmode and instead of flashtool picking up my phone name, it picks the serial number and wont flash anything to it.
> I headed over to another serviceman who then mentioned that there may be some mis-communication (I think its what he said, accent threw me off) - I assumed he meant the flex cable could be defective? Or maybe my IC board has kicked the bucket?
Thinking of switching back my old flex cable but wanna hear from you guys what think it could be.
P.S. I have seen similar threads asking about flashing LEDs and flex cable issues, one thread in particular referred the poster to an application called SEtool but, for one, I cant use it since my phone (1) burns up fast and (2) wont boot up most of the time (drains/"kills" the battery whenever it heats up).
First i must say hello to all recently i have bought 2 phones one for me and another to my girlfriend the phones are a moto g cdma from verizon mine is working ok but the other stopped working after a fall
My girlfriend had the phone but then fall to the floor
The phone shut down, also the lcd was completely broken, but the digitizer was intact. so i know that the digitizer is fused with the lcd, so if i need to replace it i just need to buy a new lcd+digitizer. alright let's tall about the logic board and battery
i oppened the phone and test the battery it says 3.7 V with a friend multimeter and i have removed it.
when i diassembly the logic board from the screen also took off the front camera, the flex also broken, but since the screen will not work anymore this will not be a problem i think.
well i just got the logic board, and wanted to connect to my pc to recover the photos but when i did it the pc didn't recognized it but when i connect it to my pc or a wall charger, a white light (notification led) turns on and doesn't turn of only if i disconnectthe usb cable.
i thought that i need the battery connected to turn it on. i just connected the battery flex , and connected it again. this time the led won't turn on instantly. just like a minute and then the notification led turns on, i don't know if that means that the logic board is broken too.
i just need to know if i need to connect the screen also to turn it on? because i don't want to purchase a replacement and see that the logic board is not working too.
if you have some thoughts to share with me just write here, please i hope you can help me
thanks in advance, henser.
Hi,
My nexus 5 lcd works intermittently. Touch works just fine. Its the display that goes on and off on its own.
The screen remains unlocked and the touch works as well but the display just shuts off. The display works for a bit and works perfectly and then just shuts. A few toggles of the power button and if i get lucky it starts "displaying" for a few more seconds before shutting off.
I can see on off messages in the linux kernel. Unfortunately, the device is in a shop and i cannot post those messages here right now.
From the hardware architecture, I gather that the display bus is not directly connected to the motherboard/SoC. It runs through the usb flex and then connects to the SoC.
Any ideas what hardware component can be at fault here? The display panel itself? The usb flex or the motherboard ?
Its an old phone. I would like it if some one with hardware expertise could share some pointers here and If anybody faced any similar issues. I am ruling out software problems as I rooted it one day and am fairly comfortable with Linux based OSes.
I am also wondering what roles the usb flex plays and if that could be at fault here.
P.S: I am not sure if this makes any sense, but the more I keep the phone off, the more duration the display remains on "in the first wakeup", a few minutes later it becomes intermittent again.
oh and everything else over usb runs just fine. USB data transfers/ charging. Is the display powered directly by the SoC usb flex plays no role ?