820-00928-A No backlight

yair37

Member
820-00928-a with short on PPVOUT_S0_LCDBKLT, i was find and take out the shorted cap, now there is no short but at diode mode with good board the caps should be 1168 and its show 350-450, what can cause the problem?
thanks!
 

2informaticos

Administrator
Staff member
Compare board readings in the same condition; both w/, or w/o LCD connected.
Lift D8410 and check again.
 

2informaticos

Administrator
Staff member
R8431 has high ohm value, but you can test removing it.
You can completely discard U8400 in this way.

I personally bet for one of filter caps, or LCD connector.
There is a "chance" for leakage between copper layers too.
 
Last edited:

yair37

Member
i was remove r8431 it give 1ohm..
i will try to take each filter out and check..the wired is..after i was disable the short it give me 1140 like the good board, and after i was put "new"filter from other board its show the 550-450
 

yair37

Member
wifi connecting just to 5ghz not to 2.4ghz...
BT not recognized...antennas are fine..
the BT area look good
 
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