Iphone 6 backlight problem - GSM-Forum

mb83 · 01-16-2016, 21:04

I have ip6 with no backlight. I've changed backlight coil - nothing; backlight diode - nothing; u1502 (backlight driver) - backlight work for 2 seconds and u1502 **** off. I put another one - same problem, when i connect lcd it works for 1-2 second, backlight shutdown and u1502 is very very hot. I tried 3 times and i gave up... I don't know why this u1502 backlight driver are ****ing off... Please help. iPhone is working fine except backlight.

sasan500 · 01-17-2016, 04:46

Maybe u have short to ground on backlight circle!! Check the resistors and caps that are connected to ground!!

Sent from my iPhone using Tapatalk

Tongbitz2 · 01-17-2016, 08:31

Check FL2024 if open

mb83 · 01-18-2016, 08:42

Fl is not a problem, backlight work but only 2 seconds and u1502 is burned. I've searched for short but there is nothing. Maybe i put diode in wrong direction? Can someone take a picture of this diode to make suer that i put it in wright direction?

mb83 · 01-18-2016, 11:45

I've checked all of components in backlight line and there is no short. I've removed 6 capacitors, i left only u1502, diode and coil but problem still exist...

PappaBaer2002 · 01-26-2016, 15:50

Hi,
did you find the solution?
Regards,
Torsten

mb83 · 01-27-2016, 15:23

Unfortunelly not... I've changed everything with no luck

orx · 01-27-2016, 16:28

ceck cap near diode if short , ceck caps near lcd ic , if all ok maybe PMU problem ..reball or replace PMU

tochits · 01-30-2016, 01:53

iPhone 6

backlight ways...
https://www.google.com/search?q=ipho...HYXMSZ2iCGM%3A

apple_jg · 01-30-2016, 09:52

hi,

iPhone 6 Long Screw Damage = No Backlight
bottom right screw

Suzain · 04-04-2016, 09:32

Hi I have 6 no backlight I changed diod and coil but sill no luck any solution

alpoianis · 04-04-2016, 20:51

Hello, try this jumper

alpoianis · 04-04-2016, 20:52

alpoianis · 04-04-2016, 20:55

I've cheked all components of backlight and look's good. This jumper was the only way to fixed.

jimchu316 · 04-04-2016, 23:52

Quote:

Originally Posted by mb83

I have ip6 with no backlight. I've changed backlight coil - nothing; backlight diode - nothing; u1502 (backlight driver) - backlight work for 2 seconds and u1502 **** off. I put another one - same problem, when i connect lcd it works for 1-2 second, backlight shutdown and u1502 is very very hot. I tried 3 times and i gave up... I don't know why this u1502 backlight driver are ****ing off... Please help. iPhone is working fine except backlight.

Removal C1592, C1597. 90% sulotion only for u case...

01-16-2016, 21:04	#1 (permalink)
mb83 Freak Poster Join Date: Jun 2014 Posts: 400 Member: 2205919 Status: Offline Thanks Meter: 33	Iphone 6 backlight problem I have ip6 with no backlight. I've changed backlight coil - nothing; backlight diode - nothing; u1502 (backlight driver) - backlight work for 2 seconds and u1502 ** off. I put another one - same problem, when i connect lcd it works for 1-2 second, backlight shutdown and u1502 is very very hot. I tried 3 times and i gave up... I don't know why this u1502 backlight driver are **ing off... Please help. iPhone is working fine except backlight.

01-17-2016, 08:31	#3 (permalink)
Tongbitz2 Junior Member Join Date: May 2015 Posts: 1 Member: 2392074 Status: Offline Thanks Meter: 0	Iphone 6 no backlight Check FL2024 if open

01-30-2016, 09:52	#10 (permalink)
apple_jg Junior Member Join Date: Sep 2011 Location: holland Posts: 11 Member: 1659355 Status: Offline Thanks Meter: 4	iPhone 6 Long Screw Damage = No Backlight hi, iPhone 6 Long Screw Damage = No Backlight bottom right screw Last edited by apple_jg; 01-30-2016 at 09:58.

01-17-2016, 04:46	#2 (permalink)
sasan500 No Life Poster Join Date: May 2015 Location: Los Angeles Posts: 544 Member: 2398349 Status: Offline Thanks Meter: 62	Maybe u have short to ground on backlight circle!! Check the resistors and caps that are connected to ground!! Sent from my iPhone using Tapatalk

01-18-2016, 08:42	#4 (permalink)
mb83 Freak Poster Join Date: Jun 2014 Posts: 400 Member: 2205919 Status: Offline Thanks Meter: 33	Fl is not a problem, backlight work but only 2 seconds and u1502 is burned. I've searched for short but there is nothing. Maybe i put diode in wrong direction? Can someone take a picture of this diode to make suer that i put it in wright direction?

01-18-2016, 11:45	#5 (permalink)
mb83 Freak Poster Join Date: Jun 2014 Posts: 400 Member: 2205919 Status: Offline Thanks Meter: 33	I've checked all of components in backlight line and there is no short. I've removed 6 capacitors, i left only u1502, diode and coil but problem still exist...

01-26-2016, 15:50	#6 (permalink)
PappaBaer2002 Crazy Poster Join Date: Jan 2014 Posts: 51 Member: 2110377 Status: Offline Thanks Meter: 5	Hi, did you find the solution? Regards, Torsten

01-27-2016, 15:23	#7 (permalink)
mb83 Freak Poster Join Date: Jun 2014 Posts: 400 Member: 2205919 Status: Offline Thanks Meter: 33	Unfortunelly not... I've changed everything with no luck

01-27-2016, 16:28	#8 (permalink)
orx No Life Poster Join Date: Oct 2012 Location: Republic of Serenissima Posts: 1,516 Member: 1825965 Status: Offline Thanks Meter: 874	ceck cap near diode if short , ceck caps near lcd ic , if all ok maybe PMU problem ..reball or replace PMU

01-30-2016, 01:53	#9 (permalink)
tochits Freak Poster Join Date: Sep 2008 Location: U.S.A Posts: 382 Member: 856640 Status: Offline Sonork: 100.1606320 Thanks Meter: 281	iPhone 6 backlight ways... https://www.google.com/search?q=ipho...HYXMSZ2iCGM%3A

04-04-2016, 09:32	#11 (permalink)
Suzain Freak Poster Join Date: Feb 2016 Location: Hubli Posts: 166 Member: 2535439 Status: Offline Thanks Meter: 14	Hi I have 6 no backlight I changed diod and coil but sill no luck any solution

04-04-2016, 20:51	#12 (permalink)
alpoianis Junior Member Join Date: Jan 2015 Posts: 17 Member: 2328500 Status: Offline Thanks Meter: 2	Hello, try this jumper

04-04-2016, 20:52	#13 (permalink)
alpoianis Junior Member Join Date: Jan 2015 Posts: 17 Member: 2328500 Status: Offline Thanks Meter: 2

04-04-2016, 20:55	#14 (permalink)
alpoianis Junior Member Join Date: Jan 2015 Posts: 17 Member: 2328500 Status: Offline Thanks Meter: 2	I've cheked all components of backlight and look's good. This jumper was the only way to fixed.