Replaced Screen now working but very Dim any ideas please?

Replaced Screen now working but very Dim any ideas please?

Hi All can you help please I've looked at related questions but cant see any answered. I replaced a Screen/lcd on my iPhone 5 but its now very dim, could I have damaged anything? I was very careful. I have cleaned connections and re connected several times but no different. I have also tried another screen still no use please can anyone help me thank you. I repair phones for Charity in the UK but this ones mine HUH!!!

Asked by: Guest | Views: 215

Total answers/comments: 6

Comments display order:

Guest [Entry]

"Backlight circuit troubleshooting needed. The cheap screens have an exposed backlight solder joint on the flex. Closing up the phone can short the backlight circuit to ground. It blows a backlight filter/fuse and this is usually the extent of it. REPAIRABLE--find the dead filter and replace it. The backlight circuit is pretty straightforward. Feel free to contact me if you need a mail-in board level repair like this to get your screen replacement back on track.

Jessa"

Guest [Entry]

Are the LCD units you are using apple original or 3rd party replacements? as if they are replacements, they may not be good quality replacements. i'm assuming you've ensured the display settings are set to full brightness as well...

Guest [Entry]

"This ""MAYBE"" a software issue and it's sort of a filter over your screen that won't permit full brightness, usually after installing iOS updates.

Here's how to fix it.

Go to Settings > General > Accessibility > Zoom > and DISABLE Zoom. Brightness returns."

Guest [Entry]

Uh-Oh. Sounds like the cheap aftermarket screens might damage something in the iPhone circuitry. I have the same issue - put on a new 'cheap' screen and the phone worked really great for about 2 weeks. All of the sudden today, I have almost no brightness, and no response to brightness slider controls. I suppose it is possible that the new screen (back-light) has actually burned out the driver in whichever chip is responsible for back-light control, which may be a fatal failure. The phone is not very usable as is, except in pitch darkness.

Guest [Entry]

"The issue may simply be caused by the light sensor. You can diagnose this by comparing the brightness of the Apple logo screen at startup and the lock screen.

If the Apple logo screen has a normal brightness compared to a dim lock screen then the issue is the light sensor.

To fix you simply need to remove and correctly seat the camera, speaker, and light sensor."

Guest [Entry]

The thing is this doesnt just happen with cheap non apple screens. I had a customer who also experienced this after the front screen was replaced by apple for a earpiece issue. Was not able to get the brightness up, and the customer was not happy about having to go back to apple.