Hi,
This board had liquid damage in U6990. First PPBUS was 1V and going down, and also all main rails were bad. So finally i checked that R6905, U6990 and U7600 were bad and i replaced them. Now i get green light on magsafe, ppbus and other rails are stable but it doesnt starts. Trying SMC bypass i get fans spinning but no chime no boot.
In SMC BYPASS all_sys is 0,03V.
ALso Checked u7000 17/18 and 27/28 are ok.
Any idea what else can be checked?
This board had liquid damage in U6990. First PPBUS was 1V and going down, and also all main rails were bad. So finally i checked that R6905, U6990 and U7600 were bad and i replaced them. Now i get green light on magsafe, ppbus and other rails are stable but it doesnt starts. Trying SMC bypass i get fans spinning but no chime no boot.
In SMC BYPASS all_sys is 0,03V.
ALso Checked u7000 17/18 and 27/28 are ok.
Any idea what else can be checked?
Last edited: