don't boot 820-2530

raainxx

Member
Hi,
i have this board 820-2530 with green led when i plug the magsafe adapter but when i push the button on, nothing, same with the pad on the board.
I have the 3,35 on the pad. I look on the scope no trace of liquid.
What can i check?
thanks
 

raainxx

Member
Hi,
I make the measure:
PPBUS_G3H on F7000=12,58V
PP3V3_S5 on Q7930=3,338V
I check C7771 on the board i find it, in diode mode 0,3, PP1V1R1V05_S5=1,060V
Thanks
 

2informaticos

Administrator
Staff member
Resistance to ground at L6995, on 200K scale?
If lower than 30K, possible bad MCP.
MCP's RTC signals OK?
C7771 doesn't fail on this board (as duke already said).
But its MCP is now so old...
 

raainxx

Member
Ok i measure the L6995 = 5,212K
MCP RTC signal is 32.768
MCP clock 25MHZ is good too.
You think it's bad MCP?
thanks
 
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