The proper procedure to isolate the problem. iMac does not startThe computer has experienced a terrible fall, and the display is broken. So I removed the display and HDD and tried to...
回答“iPad will not turn on”What happens if you put it on charge. Note that if it is completely discharged, it may take a long time until the charging symbol appears. More information about the standard diagnostic procedure in your case can be found here: “If your iPhone, iPad, or iPod touch won't turn on or is frozen” https://support.apple.com/en-us/HT201412 “If your iPhone, iPad, or iPod touch won't charge” https://support.apple.com/en-us/HT201569
回答“Backlight out but can still see Apple logo”There is a backlight fuse on the motherboard near the SATA connector. You should test it with a multimeter for continuity first.