bighead
New member
Hi,
I'm trying to fix a liquid damaged 820-3476 board.
After the cleaning I got green and orange light on the charger.
U7200 was correded. I changed it.
The board still does not start. The fan does not spin up.
I have:
PP3V3_S5
PPBUS_G3H 12.56V
PP3V3_SUS
PP1V05_SUS
PPVRTC_G3H
PCH_CLK32K
RSMRST at 3.1V
PP5V_S4 - comes on for a sec
Y5110 oscillates - for a sec. I changed the SMC I thought that's the problem. It wasn't. It does the exact same thing.
When first I connect the adapter I can measure all the voltages for a sec.
So I have CPU VCORE. PP3V3_S0 etc. I got something on every power rail for a sec, but the fan doesn't spin up at all.
I have to reconnect the power adapter every time, if I want to measure those power rails.
Any thoughts?
Thank you!
I'm trying to fix a liquid damaged 820-3476 board.
After the cleaning I got green and orange light on the charger.
U7200 was correded. I changed it.
The board still does not start. The fan does not spin up.
I have:
PP3V3_S5
PPBUS_G3H 12.56V
PP3V3_SUS
PP1V05_SUS
PPVRTC_G3H
PCH_CLK32K
RSMRST at 3.1V
PP5V_S4 - comes on for a sec
Y5110 oscillates - for a sec. I changed the SMC I thought that's the problem. It wasn't. It does the exact same thing.
When first I connect the adapter I can measure all the voltages for a sec.
So I have CPU VCORE. PP3V3_S0 etc. I got something on every power rail for a sec, but the fan doesn't spin up at all.
I have to reconnect the power adapter every time, if I want to measure those power rails.
Any thoughts?
Thank you!