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MB pro 820-3332-a , black screen , fan spins crazy .
- Thread starter Petro
- Start date
You must check diode mode at L6995; usually aprox 0.300, red probe at ground.
If big difference, lift one pin and see where the lower value remains.
If big difference, lift one pin and see where the lower value remains.
So you change and power up the board directly?
No previous measures in diode mode???
Post diode mode at L7030 and check Q7030 for short.
No previous measures in diode mode???
Post diode mode at L7030 and check Q7030 for short.
"L6695 = right pin 0.333 , left pin 0.000"
No way to know how you look at the board; you may look in schematic, or boardview in different way.
That coil has pins 1 and 2 marked on the schematic; please post accurate infoormation.
I suppose you got different ohm values because coil is lifted...
"Q7030 is shorted i think. i removed it ."
Why don't measure it, once removed?
No way to know how you look at the board; you may look in schematic, or boardview in different way.
That coil has pins 1 and 2 marked on the schematic; please post accurate infoormation.
I suppose you got different ohm values because coil is lifted...
"Q7030 is shorted i think. i removed it ."
Why don't measure it, once removed?
You have short on 3V42_G3H rail.
ISL6259 and SMC are suspect, but more chips are connected there.
You can try to inject voltage (carefully)...
ISL6259 and SMC are suspect, but more chips are connected there.
You can try to inject voltage (carefully)...
