nik1981
Member
I have an 820-00840 with no backlight. Tried multiple screens but no difference.
Took the board out and it seems that Q8400 is getting its 12.9v PPVIN on pin 4 but the hate voltage is also 12.9v on pin 3 so isn't opening.
I can't seem to figure out why pin 3 isn't dropping. The resistance between pin 4 and 3 is 80k so seems fine there.
Any help would be greatly appreciated
Took the board out and it seems that Q8400 is getting its 12.9v PPVIN on pin 4 but the hate voltage is also 12.9v on pin 3 so isn't opening.
I can't seem to figure out why pin 3 isn't dropping. The resistance between pin 4 and 3 is 80k so seems fine there.
Any help would be greatly appreciated