Htc One x strange backlight problem - GSM-Forum

IT1989 · 09-24-2012, 04:15

Hey guys,

This is my first post on this forum. I have been reading a lot here and I find the information posted here very useful. I have a repair shop in Sydney, Australia.

Hope you guys can help me. A customer came to the shop with a cracked touch screen on a HTC One X and the backlight was working fine. I have worked on htc one x a lot of times. I took the motherboard out and tested a new LCD/touch assembly without replacing the cracked screen to make sure the new LCD/touch was working. When I did test it the backlight was working fine again. Then I went and replaced the touch/LCD and when I closed the phone to test the screen again there was no backlight.. I have tried other LCD/touch screens and backlight is still not working. How could I fix this problems?

Please advise
Thank you

Mobile Fix Simple · 09-24-2012, 05:48

replace the inductor and coil next to the display ic. It willbe solved.

IT1989 · 09-24-2012, 05:59

thanks so much for the reply.

Where is the inductor? location?

Thanks heaps mate

IT1989 · 09-24-2012, 06:54

Managed to fix it by replacing the 220 coil by 2r2 coil on one x from an iPhone logic board

cliff222 · 10-02-2012, 09:47

Its works thank you so much!!!!!!

haller · 10-03-2012, 16:15

I have the same proble, can u show on picture which one I should to replace?

Mobile Fix Simple · 10-04-2012, 15:18

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

jr astigin · 10-05-2012, 02:11

kindly show the pic of that parts thanks

cdma-india · 10-05-2012, 07:19

Quote:

Originally Posted by windyfan

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

here is pcd layout u can edit it where to make change and post it

thanks

zalve · 10-09-2012, 20:45

have same problem a picture would be very very very helpfull!

thanks in advance

Mobile Fix Simple · 10-10-2012, 16:15

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!

dan_bremen · 10-23-2012, 16:08

same problem here with 2 One-x will try this solution and post the result, thanxXX

Li Hoy · 10-24-2012, 13:21

Replace the coil with an inscription 220 with the coil from SE W880 with an inscription 220! To me helped!

dan_bremen · 10-25-2012, 15:54

Today I replaced the "220" coil with a "2R2" coil from an Iphone 3G like IT1989 said and IT WORKED too :-D

SavageAlex · 12-03-2012, 16:28

Have a trouble with replacing the coil. When soldering the coil accidentally have been unsoldered a capacitor.

Later, trying to solder the capacitor has finally lost it. Who can help identify capacitor?

09-24-2012, 04:15	#1 (permalink)
IT1989 Junior Member Join Date: Jun 2012 Posts: 15 Member: 1776142 Status: Offline Thanks: 0 Thanked 4 Times in 3 Posts	Htc One x strange backlight problem Hey guys, This is my first post on this forum. I have been reading a lot here and I find the information posted here very useful. I have a repair shop in Sydney, Australia. Hope you guys can help me. A customer came to the shop with a cracked touch screen on a HTC One X and the backlight was working fine. I have worked on htc one x a lot of times. I took the motherboard out and tested a new LCD/touch assembly without replacing the cracked screen to make sure the new LCD/touch was working. When I did test it the backlight was working fine again. Then I went and replaced the touch/LCD and when I closed the phone to test the screen again there was no backlight.. I have tried other LCD/touch screens and backlight is still not working. How could I fix this problems? Please advise Thank you

10-10-2012, 16:15	#11 (permalink)
Mobile Fix Simple Insane Poster Join Date: Jul 2012 Location: Brisbane Posts: 61 Member: 1788854 Status: Offline Thanks: 3 Thanked 3 Times in 2 Posts	here is the solution of htc one x back light 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!

10-23-2012, 16:08	#12 (permalink)
dan_bremen Junior Member Join Date: Jun 2011 Posts: 9 Member: 1592618 Status: Offline Thanks: 2 Thanked 1 Time in 1 Post	Same problem same problem here with 2 One-x will try this solution and post the result, thanxXX

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09-24-2012, 05:48	#2 (permalink)
Mobile Fix Simple Insane Poster Join Date: Jul 2012 Location: Brisbane Posts: 61 Member: 1788854 Status: Offline Thanks: 3 Thanked 3 Times in 2 Posts	replace the inductor and coil next to the display ic. It willbe solved.

09-24-2012, 05:59	#3 (permalink)
IT1989 Junior Member Join Date: Jun 2012 Posts: 15 Member: 1776142 Status: Offline Thanks: 0 Thanked 4 Times in 3 Posts	thanks so much for the reply. Where is the inductor? location? Thanks heaps mate

09-24-2012, 06:54	#4 (permalink)
IT1989 Junior Member Join Date: Jun 2012 Posts: 15 Member: 1776142 Status: Offline Thanks: 0 Thanked 4 Times in 3 Posts	Managed to fix it by replacing the 220 coil by 2r2 coil on one x from an iPhone logic board

10-02-2012, 09:47	#5 (permalink)
cliff222 Junior Member Join Date: Mar 2006 Posts: 30 Member: 241270 Status: Offline Thanks: 9 Thanked 0 Times in 0 Posts	Its works thank you so much!!!!!!

10-03-2012, 16:15	#6 (permalink)
haller Freak Poster Join Date: May 2004 Location: Poland, Poznan Age: 27 Posts: 245 Member: 66993 Status: Offline Thanks: 9 Thanked 2 Times in 2 Posts	I have the same proble, can u show on picture which one I should to replace?

10-04-2012, 15:18	#7 (permalink)
Mobile Fix Simple Insane Poster Join Date: Jul 2012 Location: Brisbane Posts: 61 Member: 1788854 Status: Offline Thanks: 3 Thanked 3 Times in 2 Posts	the back side, next to the Display IC, there are inductor and coil in the central area.

10-05-2012, 02:11	#8 (permalink)
jr astigin No Life Poster Join Date: Apr 2008 Location: Pilipinas Posts: 1,813 Member: 757159 Status: Online Thanks: 1,664 Thanked 383 Times in 248 Posts	kindly show the pic of that parts thanks

10-09-2012, 20:45	#10 (permalink)
zalve Junior Member Join Date: Jul 2008 Posts: 33 Member: 805654 Status: Offline Thanks: 0 Thanked 0 Times in 0 Posts	have same problem a picture would be very very very helpfull! thanks in advance

10-24-2012, 13:21	#13 (permalink)
Li Hoy Junior Member Join Date: Dec 2007 Posts: 10 Member: 648760 Status: Offline Thanks: 3 Thanked 4 Times in 3 Posts	Replace the coil with an inscription 220 with the coil from SE W880 with an inscription 220! To me helped!

10-25-2012, 15:54	#14 (permalink)
dan_bremen Junior Member Join Date: Jun 2011 Posts: 9 Member: 1592618 Status: Offline Thanks: 2 Thanked 1 Time in 1 Post	Today I replaced the "220" coil with a "2R2" coil from an Iphone 3G like IT1989 said and IT WORKED too :-D