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FUZE keypad backlight and LCD backlight problem. Please help...

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?

To anyone who has successfully replaced one x lcd/digitizer

So i purchased a LCD/digitizer from eBay and received it in the mail this morning. I followed the steps and was able to get my cracked screen (digitzer&lcd) off. After assembling it all with the new screen i ran into an issue.
There is no response from the screen at all it is just black. The phone boots fine though because it vibrated and then a few minutes later i can hear my notifications go off and the led is flashing.
could it be a bad connection with the wires, if so what one should I look at, Did i buy a faulty screen, or am i just sol?
is there any difference between a One X and a One XL screen?
any help is appreciated.
purchased from here: http://www.ebay.com/itm/271006361868?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_2923wt_1218

Could be bad connection..there is a YouTube vid on replacing it..
Sent from my HTC One X using XDA

yea that is what i am assuming since nothing was working but i just wanted to see if anyone else ran into this issue :/

I've successfully replaced the lcd/digitizer on my htc one xl, and gonna be doing another one soon. Make sure the connections are fully clamped in place. the top connection closest to the htc/at&t logo on the screen controls the touch, while the bottom connection controls the picture. So just see if the bottom connection is damaged or maybe out of place. If nothing is wrong with them then you may have a faulty screen. I suggest always testing the screen before actually putting everything in place with the adhesives, so just connect it first and if it works then you can reassemble everything.. I'm not too sure whether there is any difference with the htc one x and one xl screen. As far as I know they should be very similar. But I would definitely stay on the safe side and get only the screen that is made for your device. I have not attempted using one with the other.

HTC One X solid red light?

When I turn my phone on after a full charge, it shows a solid red light in the LED display and I cannot see anything on the screen? What does this mean and how can I fix this? I am attempting to replace the screen/digitizer on my HTC One X, and I am positive I have connected this display correctly

Are you sure you got the correct screen? There are three different models for this phone and you must ensure you install the right one. Also, did you sync the screen?
Sent from my Evita

Well I purchased the screen off of Ebay and it states "Original OEM Assembly Full LCD Display Screen Touch Digitizer HTC One X OneX". The screen looks to be the right one upon comparison between my old one and new one. I have a telus HTC One X, which is the same as the AT&T version, I am not sure about how to find the version of the screen. I thought that they would just be compatible, otherwise I will be getting a refund. So how can you tell if the screen is the correct one?
Also I am unfamiliar with how to sync the screen. I am following a youtube video which shows you how to test the display by connecting the display. http://www.youtube.com/watch?v=OIeO0DueMcg

You can tell if the screen is the right one by the flex cable connected to it. If it is the same as the old flex cable and the same colour then you have the right screen. To sync the screen you need to remove the old screen and install the new screen while the phone is powered on.
Sent from my Evita

Ok, the cables are the same colour and everything so I think it should be fine. I disconnected the battery and the reconnected it, turned on the phone with the old damaged screen in. It started up and flashed green once briefly (this is normal), and then the LED light went solid red.
I then took the old screen out, and plugged the new one in and still had no activity.
BTW I really appreciate your help. I will definitely do my best to explain what is happening, I can even post pictures or video if necessary.

It's possible you've damaged something during the installation process. It's a bit hard to say. To be honest I'm not much more help other than what I've already posted here, that's about the extent of my knowledge when it comes to replacing the display.
Sent from my Evita

Thats ok, your input was still valuable. I think it might be a battery issue. I don't see anything immediately noticeable that I could have damaged, I was quite careful during the whole process. I bought a new battery for $10 and I will try putting that in when I get it. Before I had charged my old battery fully it was flashing red, which I read meant it was on low battery. So I charged it, and now its solid red even when the charger is not connected. I am not sure what this exactly means but hopefully if people like yourself keep posting suggestions I might just figure this out!

Nexus 5 Display not working. Don't know what to replace.

So, I was trying to replace my Nexus 5s camera and I disassembled the main motherboard. Replaced my camera and everything but after I reassembled the phone, I found out that there's no display. The LEDs work fine, because I see them light up and I see that the screen is black but it's a bright black and the screen is on. So after tampering with it, I found that the little USB charger port wire board wire thst connects just above the battery (idk how to describe it, its the orange strip that locks the battery in place) had a direct correlation with the display. If I unplugged it, the screen would go dark and off. If I replugged it, it would be on again. After doing this a few times, I actually got my phone's display to show for a little while before it went away to black again. So will buying a new orange strip part work or would I have to go to the bottom where the little screen digitizer is? I'm sorry if the problem is unclear because I really don't know how to say it or explain any better. Please help.

Replacing that strip is actually not easy.
With the device open, try to apply a little bit of force on the plug of the orange strip, there are mentions of the contacts stop working after upluging/pluging back.
You probably could buy a front frame (glass, touch, lcd and chassis) from ali cheap.

Mate 8 screen not working even after replacing it

Hello,
My Huawei Mate 8's display got suddenly broken while I was using it. The screen remains blank whatever I do. However the phone seems to work as the notification led blinks because of my unread messages. And when I press on power button for several seconds, it vibrates so I know it reboots.
I bought a new LCD replacement screen to a well rated ebay seller. I tried to connect the new lcd to the phone's connector, but it remained blank.
It is unlocked, rooted, with a custom rom, but I hadn't done anything on system for about one year. I tried power+VolUp+VolDown to enter in fastboot mode but it remains blank. It really seams to be a hardware failure, but not from lcd part.
- The original screen frame was white but the new one is black. Do you think it may be incompatible?
- Is there a part other than screen and complete motherboard I can replace to have my Mate 8 work again?
Thank you.

I can only answer to this: "The original screen frame was white but the new one is black.". It has nothing to do, my phone was white i changed to black frame and works fine without problems.

Thank you
spid1005 said:
I can only answer to this: "The original screen frame was white but the new one is black.". It has nothing to do, my phone was white i changed to black frame and works fine without problems.
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Click to collapse
It was an hypothesis but I was nearly sure it was false. But thank you for your confirmation.