Backlight ok but no picture iPhone 5C - GSM-Forum

Xyberz · 03-28-2015, 04:12

Strange, this customer's device came back and the thing has no picture but backlight works. Tried multiple new screen assemblies and all the same thing. The device works and turns on since I can sync to the computer and it asks me to allow syncing on the device, which I obviously can't.

Looked at the board under the microscope but don't see anything on top. Any ideas of what could be damaged?

buds_guy · 03-28-2015, 07:33

Quote:

Originally Posted by Xyberz

Strange, this customer's device came back and the thing has no picture but backlight works. Tried multiple new screen assemblies and all the same thing. The device works and turns on since I can sync to the computer and it asks me to allow syncing on the device, which I obviously can't.

Looked at the board under the microscope but don't see anything on top. Any ideas of what could be damaged?

bro try this, check this capacitor if shorted just remove it and it will be ok

Xyberz · 03-28-2015, 11:31

Quote:

Originally Posted by buds_guy

bro try this, check this capacitor if shorted just remove it and it will be ok

How do you guys remove the back shield like that? It's soldered on. I'm assuming with a hot air gun?

buds_guy · 03-28-2015, 16:00

Quote:

Originally Posted by Xyberz

How do you guys remove the back shield like that? It's soldered on. I'm assuming with a hot air gun?

yup bro use hot air to remove the back cover

Xyberz · 03-28-2015, 23:53

Tested the capacitor for continuity and it works. Still removed it just in case and now the backlight doesn't even come on. Device still syncs to computer.

Any other ideas?

Xyberz · 03-29-2015, 03:36

So, I figured out that not only does the LCD not work, but the touchscreen too. So the whole screen assembly doesn't work. Tried multiple new screens, both colors, and none work. I hooked the device up to a projector using the Apple video cable and it shows the unlock screen. So device is working perfectly, just no touch or LCD.

Xyberz · 03-29-2015, 04:03

I'm not sure if this chip makes a difference but it looked pretty fried when we got it.

braxton · 03-30-2015, 04:11

i too have the same problem with one iphone 5c. backlight on lcd working but no image and no touchscreen. still trying to find the solution...

Xyberz · 03-31-2015, 03:30

Anyone have any clue to where else on the motherboard this could be causing the issue?

cal_guy · 04-01-2015, 03:42

Quote:

Originally Posted by Xyberz

I'm not sure if this chip makes a difference but it looked pretty fried when we got it.

This is related to antenna.

Post a clear photo of LCD connector.

Also was it liquid damaged??

cal_guy · 04-01-2015, 03:43

Quote:

Originally Posted by buds_guy

bro try this, check this capacitor if shorted just remove it and it will be ok

Remove it only if it is shorted.

Xyberz · 04-02-2015, 03:09

Quote:

Originally Posted by cal_guy

This is related to antenna.

Post a clear photo of LCD connector.

Also was it liquid damaged??

LCD connector is in perfect condition. I even removed the black tape and nothing was out of place.

No liquid damage at all. All indicators pure white.

gtnkais · 08-13-2018, 12:55

worked for me
before:lines and touch doesnt work,when i change new lcd black screen
after: all works

03-28-2015, 04:12	#1 (permalink)
Xyberz Junior Member Join Date: Jun 2011 Posts: 38 Member: 1607267 Status: Offline Thanks Meter: 6	Backlight ok but no picture iPhone 5C Strange, this customer's device came back and the thing has no picture but backlight works. Tried multiple new screen assemblies and all the same thing. The device works and turns on since I can sync to the computer and it asks me to allow syncing on the device, which I obviously can't. Looked at the board under the microscope but don't see anything on top. Any ideas of what could be damaged?

03-28-2015, 23:53	#5 (permalink)
Xyberz Junior Member Join Date: Jun 2011 Posts: 38 Member: 1607267 Status: Offline Thanks Meter: 6	Tested the capacitor for continuity and it works. Still removed it just in case and now the backlight doesn't even come on. Device still syncs to computer. Any other ideas?

03-29-2015, 03:36	#6 (permalink)
Xyberz Junior Member Join Date: Jun 2011 Posts: 38 Member: 1607267 Status: Offline Thanks Meter: 6	So, I figured out that not only does the LCD not work, but the touchscreen too. So the whole screen assembly doesn't work. Tried multiple new screens, both colors, and none work. I hooked the device up to a projector using the Apple video cable and it shows the unlock screen. So device is working perfectly, just no touch or LCD.

03-30-2015, 04:11	#8 (permalink)
braxton Insane Poster Join Date: Jan 2009 Posts: 70 Member: 952935 Status: Offline Thanks Meter: 11	i too have the same problem with one iphone 5c. backlight on lcd working but no image and no touchscreen. still trying to find the solution...

03-31-2015, 03:30	#9 (permalink)
Xyberz Junior Member Join Date: Jun 2011 Posts: 38 Member: 1607267 Status: Offline Thanks Meter: 6	Anyone have any clue to where else on the motherboard this could be causing the issue?

08-13-2018, 12:55	#13 (permalink)
gtnkais Junior Member Join Date: May 2013 Posts: 20 Member: 1930387 Status: Offline Thanks Meter: 9	worked for me before:lines and touch doesnt work,when i change new lcd black screen after: all works