Htc One x strange backlight problem

[tnsrepairing]

i have htc desire bravo a its wont turn on when push the power button show green and orange light but its wont on i rebole the power ic and re hot the cpu but it still on this condition any one have the solution of this problem plz tell me

[Maroon-WSU]

i tested all these solutions many many times phone will work but after 2 weeks most of them back to same problem

[in_shallow_seas]

Damn! I had the problem, first time i replaced screen, the HTC logo flashed on first boot and it went dim. Then I replaced the 220 coil to a new one, hoping it would work. And it did for a second, after which the screen went dim again! Anyone know what might be causing this? At least now I'm sure what the consequence of this problem is: the 220 coil... but i just don't know the cause

[christmobiles]

I also have the same problem with Htc one x I have being locking to the solution I will try it bro thx for your help


unlock4life

[holodram]

Originally Posted by in_shallow_seas

Damn! I had the problem, first time i replaced screen, the HTC logo flashed on first boot and it went dim. Then I replaced the 220 coil to a new one, hoping it would work. And it did for a second, after which the screen went dim again! Anyone know what might be causing this? At least now I'm sure what the consequence of this problem is: the 220 coil... but i just don't know the cause

have you bought the RIGHT lcd that fits your hox? i.e. green flex or yellow or even yellow with green mark on it?

[fonexp]

Repaired several units with this problem and I can conclude the following:
permanent way to fix is to check and replace both coils and ****reball/replace IC****.
If the problem is internal to the IC, replacing the coil will be only a temporary fix.
Even if someone doesn't have proper tools to check the inductance - just unsolder coils and check resistance: 220 has to be 760mOhm and 2r2 190mOhm. If the inductance and resistance are in range - replace IC or at least try reballing it.
In many units even after replacing both coils, phone fails again after hours, sometimes few days.
Sometimes IC is re-flowed while replacing coil and the effect seems be positive, but again, it might not be permanent.

Replacing 220 coil with the one from iPhone 3gs is a suicide mission. 220 is 22uH, 330mA and 2r2 is 2.2uH, current rating above 1A - after that IC will fail together with the replaced coil.

[cristi_slob]

Originally Posted by fonexp

Repaired several units with this problem and I can conclude the following:
permanent way to fix is to check and replace both coils and ****reball/replace IC****.
If the problem is internal to the IC, replacing the coil will be only a temporary fix.
Even if someone doesn't have proper tools to check the inductance - just unsolder coils and check resistance: 220 has to be 760mOhm and 2r2 190mOhm. If the inductance and resistance are in range - replace IC or at least try reballing it.
In many units even after replacing both coils, phone fails again after hours, sometimes few days.
Sometimes IC is re-flowed while replacing coil and the effect seems be positive, but again, it might not be permanent.

Replacing 220 coil with the one from iPhone 3gs is a suicide mission. 220 is 22uH, 330mA and 2r2 is 2.2uH, current rating above 1A - after that IC will fail together with the replaced coil.

hello ..i`ve changed lcd and noticed that lcd light is flichering and dim...can you help me with real solution? all parts from led driver 220 seems ok...above battery connector is a coil which is cracked...can it be from that? where to get one ?

br cristi

[christmobiles]

I'm still facing this problem I have change the col and capacitor it work for some time and start again my is one x pls help


unlock4life

[abelrossi]

Hi Cristmobiles,

I'm sorry for you but that is the solution (change Coil). If that is the problem, that is the solution. I don't think there is a better way to fix this or to make more stable. This is it , I'm sorry for you. Change coil again and be sure (by measuring) that it is a good coil ! Good luck

[mobilgod]

coil 220 it is same whith sony-ericsson k750

[diesel57]

The problem is bad quality LCD, there are hundreds of copy LCD on the market that are bad quality, some times this fault will only show after a few weeks, best solution is to buy an original LCD ........

D

[thagangsta]

I can confirm that the 2R2 coil from a 3G mainboard is effective...

[bluehawk20]

Replaced coil,inductor and ic.Light working but now phone stuck on LOGO and wont charge.When insert usb to flash or charge phone shut down.pls help

[brinm]

This solution has worked for me 100%%%%%% correct from taking coils from sony ericsson

[zezoelec]

Originally Posted by Mobile Fix Simple

the back side, next to the Display IC, there are inductor and coil in the central area.

Hello
What's is your website ?


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