HTC One X LCD Backlight Problem

[i am the master]

Originally Posted by joak0068

Hmm, I tried changing both coils.. still doesn't work. I think I have the right chip, but don't know if I'm able to change it. I only have a heatgun :/ does anybody know the pinout of the screen connecter? Mayby i could just make a constant voltage to the led's directly...

I can fix it for you only by post for more information contact me [email protected]

[Benhure]

the backlight is a hardware fault on the One-X PCB, tomorow i make a picture from LCD with backlight way and you can see it is a hardware fault ....

[arion tonel]

i tried all other solution i'm waiting for yours

[sarojg]

where is the diagram ..bro ?

[doctafras]

i need help. does anyone kno where the those chips are located on the US AT&t version of the One X

[Benhure]

have you an nvidia IC ?

on the market we have 2 PCB's ...

this problem on nvidia PCB is not a LCD or a Display problem, this is a PCB problem, anybody change the "coil's" or light IC, i change all on PCB and disamble a complete LCD to find the backlight line. Backlight works fine and all displays (3) have no faults. This is a problem from PCB. Bad Coils, Light IC or other faults on the PCB ...

[Mobile Fix Simple]

It is better to remove the battery in the first step, in order to avoid any short circuit and damage any parts. Cheers.

[teknoali]

Originally Posted by Mobile Fix Simple

Please do one by one! Your problem will be solved.
P.S. the mother board of One X is different with One XL. This Solution is for HTC ONE X ONLY!

Thanks bro %100 working. Nokia 5310 220 IC same . i am use to .

thanks...

[texas_predator]

Hello guys I have the same problem I just replace in my htc one x the lcd with digitizer and I found this problem . I turn the phone on and I feel is on and touch the volume I can hear is working I feel vibrations but nothing on the screen , and also I try to find eny info about this problem my htc one x is from us att and there is some info about the lcd 3 diferent types Compatible: AT&T HTC One X yellow flex version and some 2 others i'm right? there is eny idea how can I fix this phone? I buy another logic board and still have the same problem :-( i'm in usa Houston tx.
I appreciate eny Help Thank's in Adavance..

[MiguelDias90]

Hi everybody,

I'm new here. I have the backlight problem, so I ordered some TPS65200YFFR IC samples from Texas. There exists the TPS65200YFFT on the site, I will have a problem if I use the TPS65200YFFR IC model?

Not tested the coils, just want to change the IC.
How do I remove it and put the new one?
Can I remove the IC with a tweezers?
I need to solder?

Thanks in advance.

[r473r]

Hello, i have a problem with backlight on the one x, it's flickering and it's very dim when i use the phone. IF the phone is idle backlight is dim but not flickering, but if I stress the cpu, for example a benchmark, it flickers to almost no light at all. If I try to set the brightness in the settings menu it doesn't work, min and max are the same, no modification (very dim). Could this be an indication that the IC is broken ?

Please read this post and give me an advice, thank you.
Also, if someone has the IC please contact me , i want to buy at a fair price.

[jamal0461]

can any one please help me with htc one x lcd light problem. can u plz tell me where inductor if of this phone..thanks in advance

[ABM30]

Originally Posted by Enrparr

Hello everyone, I'm Italian, thanks to you I solved my one x, replacing inductor 220 from a nokia 5200! inductor original is "VLF3010ST-220MR34" measure 22uH! can be found in many cell nokia color although a little bigger ex. N5500

Originally Posted by Scorpion23

Hello all! If need this paarts, IC, get please! there she. TPS65200 -
(ACTIVE) Li+ Battery Charger With WLED Driver and Current Shunt Monitor - Lnk to E_B_A_Y, in adress bar, delite symbol (*)

Replacement parts:
Coil 1: 220mH
Coil 2: 2.2 mH
IC1: TPS65200
that all..)))

ths list phone models, where you can, finde that IC:

Hello everyone,
I like to know if someone can confirm the correct value for "220" coil:
Is 22uH (22 micro Henry) and VLF3010ST-220MR34 from TDK fits or
is an 220 mH (mili Henry)
I'm facing the same problem: blank screen after display+touchscreen replacement on my HOX. I chek the functionality for my phone through an usb-HDMI adapter, linked the HOX with my TV, I got pictures and everithing seems to be functional, including touchscreen but not the display. So i want to change the 220 coil to see if it will work, but I need the correct vallue. The aprox. dimenssions (measured) for 220 coil are: H=1,2 mm, and Diameter=3mm. The values are corresponding to TDK's VLF3010ST-220MR34 .
Thank you in advance.

[dailor]

Hi folks,

I had some bad experience, with LCD exchange. When everything was assembled except the back panel, I tried to power on the phone to test is everything goes right. I hold up the battery pressed to chassis by hand, as it was not sticked to chassis (factory adhesive was not so sticky anymore). Few seconds after phone booted up, the screen starts flickering and after two flashes by backlight in max brightness it turned dimmed and stoped respond on manual brightness adjustment. So after some minutes of visual analysis I figured out what caused that. See attached picture explanation below.

In my case only the 22uH (bigger one marked with 220) inductor was damaged, after exchanged it backlight was fixed.

Regards,
dailor

[janzir]

coil 220 is 22uh coil and can be found in lots of nokia phones