Iphone 6s no backlight - GSM-Forum

camillo90 · 03-19-2018, 11:57

Hi guys i have iphone 6s with no backlight.
The phone was waterdamage . I remove shield and check the backlight aerea.
Clean with alchol but same problem
So i have change all aerea backlight
changed :
d4020 (take on iphone 6)
d4021
c4023
u4020 ic
c4041
l4040 .
After change all , power on the phone but the same problem

working perfect but no backlight.
Disassemble again the phone and check voltange.
enter on u4020 tested on d4020 around 4v , on l4040 the same.
I think don't have boost 24v.
Checked lcd connector it is ok.
any can help me?

camillo90 · 03-19-2018, 11:59

oh I forgot fl 4211 fl 4212 working

christina_ · 03-19-2018, 22:33

Quote:

Originally Posted by camillo90

oh I forgot fl 4211 fl 4212 working

you fixed it??

yes??

how??

OsKsa · 03-21-2018, 08:32

check
c4004
c4201
u4000 ic
c4200
FL4200
c4203

camillo90 · 03-23-2018, 11:11

Yes I fixed guys , I have replace again ic backlight and work. I think the first was fault . I check voltage out of ic , but no boost voltage , change it and worked

::. zine .:: · 06-20-2018, 15:06

Quote:

Originally Posted by camillo90

Yes I fixed guys , I have replace again ic backlight and work. I think the first was fault . I check voltage out of ic , but no boost voltage , change it and worked

can you post picture here

03-19-2018, 11:57	#1 (permalink)
camillo90 Major Poster Join Date: Mar 2017 Posts: 46 Member: 2700638 Status: Offline Thanks Meter: 4	Iphone 6s no backlight Hi guys i have iphone 6s with no backlight. The phone was waterdamage . I remove shield and check the backlight aerea. Clean with alchol but same problem So i have change all aerea backlight changed : d4020 (take on iphone 6) d4021 c4023 u4020 ic c4041 l4040 . After change all , power on the phone but the same problem working perfect but no backlight. Disassemble again the phone and check voltange. enter on u4020 tested on d4020 around 4v , on l4040 the same. I think don't have boost 24v. Checked lcd connector it is ok. any can help me?

03-19-2018, 11:59	#2 (permalink)
camillo90 Major Poster Join Date: Mar 2017 Posts: 46 Member: 2700638 Status: Offline Thanks Meter: 4	oh I forgot fl 4211 fl 4212 working

03-21-2018, 08:32	#4 (permalink)
OsKsa Junior Member Join Date: Mar 2018 Posts: 4 Member: 2823068 Status: Offline Thanks Meter: 1	check c4004 c4201 u4000 ic c4200 FL4200 c4203

03-23-2018, 11:11	#5 (permalink)
camillo90 Major Poster Join Date: Mar 2017 Posts: 46 Member: 2700638 Status: Offline Thanks Meter: 4	Yes I fixed guys , I have replace again ic backlight and work. I think the first was fault . I check voltage out of ic , but no boost voltage , change it and worked