iPhone 6 Backlight Repair Service
Do you have an iPhone 6 with no back light or stuck on medium brightness?
This is a typical repair service we offer at Micro Soldering Repairs.com
A blown back light on an iPhone 6 is typically caused by a screen replacement gone wrong or a sudden drop on the phone which can damage some of the components on the backlight circuit.
Lets take a look at the back light circuit and evaluate the possible issues and solutions to this problem.
The backlight circuit on the iPhone 6 mostly consist of 3 capacitors (C1530, C1531, C1505) A diode (D1501) 3 filters, (FL2024, FL2025, FL2026) as well as a backlight driver (IC) U1502
Typically on an iPhone 6 with no backlight that needs repair, the first thing to check is the 3 capacitors to check if they are shorted to ground, this is a common problem with capacitors and can be easily replaced with a hot air station or a pair of hot tweezers. The capacitors are 2.2μ F in value and have a 0402 package size.
If the capacitors are not shorted to ground then you should look to other components to see any obvious signs of problems.
Above we can see the left side (negative) of the diode has burnt which is typically a sign of something else in the circuit that has shorted and/or failed causing the diode to smoke and burn.
If we were to replace the diode and connect the board to power it would most likely burn again. The diode burning is only a sign of some other problem.
After checking and/or replacing the other components in the backlight circuit the next culprit can be the backlight driver (U1502) which controls the whole circuit. This integrated circuit is a BGA IC which has underfill (glue) around the chip. Once the glue has been removed and scraped away it can be heated with a hot air station to melt the solder balls under the chip.
After replacing the Backlight Driver IC we no longer have a short to ground on the circuit which restored the back-light on the iPhone 6.
If you need this iPhone 6 repair service then you can stop in our shop located at: 383 College St. Burlington, VT 05401 or use our send in repair service.