Backlight not working. Even after replacing screen and USB charging circuit.

[opencube]

Hi,

I originally posted here:

http://xdaforums.com/google-nexus-5/help/attempted-repair-n5-usb-port-phone-t3157969

But my issue has somewhat changed. I realised that the phone was still working, and i could see stuff on the blank screen if i shined a flash light at the screen. This led me to beleive it was the backlight that was broke.

I investigated replacement screens and it seems that there a lot of cheap replica screens out there that have their own issues, and rather than pay full price for a legitimate LG part (around £95) I decided to buy a second hand faulty N5 from eBay that had a working screen (£50). The one I purchased had an issue with its mic, and the screen works perfectly fine.

I placed my motherboard into this phone from ebay, but it became apparent that the same issue was happening. The backlight wasnt working in this other phone.

I placed the motherboard from the phone I bought off ebay and it worked with the screen in my own phone!

So the problem seems to be isolated to this part:

I didnt think the backlight would have anything to do with this, however its the only part I have swapped around. :/

Anyone have any ideas?

Thanks

 

[lucaslovercio]

Same issue?

Hi,

I originally posted here:

http://xdaforums.com/google-nexus-5/help/attempted-repair-n5-usb-port-phone-t3157969

But my issue has somewhat changed. I realised that the phone was still working, and i could see stuff on the blank screen if i shined a flash light at the screen. This led me to beleive it was the backlight that was broke.

I investigated replacement screens and it seems that there a lot of cheap replica screens out there that have their own issues, and rather than pay full price for a legitimate LG part (around £95) I decided to buy a second hand faulty N5 from eBay that had a working screen (£50). The one I purchased had an issue with its mic, and the screen works perfectly fine.

I placed my motherboard into this phone from ebay, but it became apparent that the same issue was happening. The backlight wasnt working in this other phone.

I placed the motherboard from the phone I bought off ebay and it worked with the screen in my own phone!

So the problem seems to be isolated to this part:

I didnt think the backlight would have anything to do with this, however its the only part I have swapped around. :/

Anyone have any ideas?

Thanks

Was your problem like this https://www.youtube.com/watch?v=Jq0buYBFdKc ?
I am having this issue, the brightness is very low and still at maximum, the image is poor. I don't know if buying a new mainboard or a display

Thanks!