a1475 ….drawing 5v 600ma. device boots up, black screen with apple logo, then just hangs on a nothing screen with backlight lit. scanned the board for obvious signs of damage. everywhere i spot checked showed no short to ground. checked connectors and pins, look good. everything seated properly. i know that the device should be booting with around 1 amp …but never ramps up to this stage. should i be searching for a filter on a data line or? any thoughts/ suggestions are welcomed.
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Re: ipad air (a1475) backlight, no image
You've plugged it into a PC/Mac and tried recovery mode ? -
Re: ipad air (a1475) backlight, no image
not yet. i didnt want to upset anything that i couldnt recover from. is this going to stop from proceeding on troubleshooting this device, or is the first step?Comment
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Re: ipad air (a1475) backlight, no image
continuing to get error 4013 on device when updating.Comment
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Re: ipad air (a1475) backlight, no image
tried again now getting error 78Comment
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Re: ipad air (a1475) backlight, no image
factory reset got it after replacing the battery. battery was shorted and puffy, corrupted data on nand.Comment
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Hello, got an iPad Pro A2378 12.9 5th gen with no backlight. Got another test unit without screen, tested the screen, still no backlight with the test unit.
Figured out the backlight on the screen was bad, ordred a new backlight from mobilesentrix, *carefully replaced it* without damaging the lcd, oh well.
Final result, issue is still there, the screen has no back lights. So i'm back to square one, with 3 hours less and 100$ out, issue still on the screen.
The panel is still ok, i can see the apple in the middle of the screen when it kicks in, just no backlight.
Anyone... -
This iPad was working fine except the battery was not holding charge for more than 40 minutes. I replaced it with a new battery. I haven't glued the battery yet, just inserted it into the slot and held it with battery screw.
The iPad was powered on with the new battery and I am getting white screen with Apple logo for about 10 seconds, then the screen turns dark. It then cycles like this forever.
I know the battery is working because the iPad continues to boot loop without the charger until it depletes to 0% and the message displays I need to plug in the charger.
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Dears, this is my first post here and first try to fix my own laptop Apple MacBook Pro Retina 15-inch Mid 2015.
I have some general electronics troubleshooting experience and still as my hoppy but this is my first laptop trying to fix.
History: my laptop backlight stopped working without any reason.
Symptoms:
I have image on screen using my flashlight.
I have fully working laptop with the help of my external SAMSUNG LED tv via HDMI cable.
Keyboard backlight still working and can be adjusted normally.
Since two days I tried to follow all similar... -
This chinese all in one computer gives an image when connected to an external vga monitor but only the backlight with integrated monitor (no image). Initially I thought it was an edid problem on the eeprom of the screen but then I saw that the monitor works correctly with another identical motherboard (model th410-d4, read by bios). Unfortunately the motherboard is chinese and has no brand or codes on the pcb. The format seems ITX. Nothing can be found online. The official yashi site provides drivers but not the bios. The electrical diagram is obviously unobtainable
The board is equipped...01-16-2025, 03:54 AM -
Hi,
No backlight on iPad 9. Made some measurements around LCD connector, please find on attached picture below.
Filter marked with green star has been replaced since it blown.
Yellow values measured relative to GND. Red ones measured on components. Filters seems to be ok, but before and after the replaced filter the resistance is very low. Is it ok?
Where this filter is connecting to?
Thanks!
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