When you replace a screen phone and the new known screen is very dim, and using any known good screen assembly with known good light sensor does not solve it, then you probably damaged something on the board related to back-light.
And it's usually any combination of the back-light filters, diode, or back-light driver.
- The damage can occur from shorting something on the board by working with battery and/or power connected, specially if using special tools.
- Can also happen due to pry damage, specially if using metal tools to unplug cables.
- Finally, can happen if the replacement screen has an uncovered back-light connection on the screen's flat cable (if you can see 1 thin cable connected to the main screen cable by 3 apparent solder points, then they are uncovered and you need to cover them before installing the new screen - or simply buy a quality screen where they are already covered). These uncovered solder points can short the back-light circuit and cause this same issue.
All the above is usually easily repairable with the right microsoldering tools.
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42 Комментариев
Hi do you found the solution?
I have the same problem but on iPhone 6
из Krabi
Go to settings, then general, then accessibility, then zoom and turn it off. Should fix the problem.
из Lacey Baker
that is super RANDOM, but totally works. I just googled this problem and your suggestion is the only one that is HELPFUL and not full of crap stupid suggestions which we've all already tried.
can you answer this... how on earth did you figure this one out, and why on earth is the ZOOM feature linked to screen brightness?
and why did my phone just today exibit this behaviour when it's never done it before...
thanks for your extremely helpful solution. :)
из Nathan Ledbetter
omg this totally worked!!! thankyou! honestly have been googling and searching my phone for answers and like the poster above me, am totally shocked that this works!!
thanks so much
из Sonia H
this did not work for me loll
из justin n
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