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iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides. |
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01-14-2020, 15:42 | #1 (permalink) |
Freak Poster Join Date: Feb 2001 Location: Netherlands Age: 39
Posts: 313
Member: 3212 Status: Offline Thanks Meter: 10 | iPad 6 A1893 backlight issue iPad 6 / 2018 / A1893. Problem: Randomly the backlight doesnt come on after pressing power or homebutton. The LCD itself does come on, so the ipad unlocks and whatever. I've seen this problem before and within warranty apple swaps it as "mainboard issue". I suspect its drop/impact damage. Nevertheless, this unit is out of warranty, but in mint condition. Any advices where to begin debugging?... Filters -> Diode -> Coil Reference values. Schematics. Thanks |
The Following User Says Thank You to thagangsta For This Useful Post: |
06-24-2020, 20:22 | #6 (permalink) |
Junior Member Join Date: Jun 2020 Location: usa
Posts: 3
Member: 2960381 Status: Offline Thanks Meter: 0 | What do the numbers/readings represent in the picture? resistance values ? I have a ipad 6 with backlight issues. I replaced one diode so far and still same issue. I don't see anything obvious like caps burned by the display connector. I swap with good lcd/ digitizer with same result. TIA. |
06-29-2020, 14:35 | #7 (permalink) |
Freak Poster Join Date: May 2013 Location: Netherlands
Posts: 376
Member: 1939450 Status: Offline Thanks Meter: 165 | I replaced the backlight ic on two ipads 2018 last week that had on/off backlight problem. Reading in one side of diode should be 230 other side 700 (orsomething) values can be found in phoneboard. Backlight ic is the same as on ipad 2017 |
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