Hey ,
Working on 820 3437, initial the board start, fans spins only after 30-50 sec but don't have any chime! first impression the board is very clean but with a real inspection i noticed U7501 have a bit off humidity! pins 23-24 because off the corrosion don't do the contact component-Board! i take the U7501 reconstruct the trace and ressolder the component U7501. After this the board don't start anymore !! already replace U7501 for new on and same history, no fan!!
i already double inspect and don't found more humidity !!!
ppbus, PP3V42_G3H , PPVRTC_G3H, PP5V_S5, PP5V_S4RS3 - ALL OK
MC_ADAPTER_EN, PM_BATLOW_L, SMC_PM_G2_EN, SMC_RESET_L. - ALL OK
only don't have PP5V_S0 !!
any idea???
Working on 820 3437, initial the board start, fans spins only after 30-50 sec but don't have any chime! first impression the board is very clean but with a real inspection i noticed U7501 have a bit off humidity! pins 23-24 because off the corrosion don't do the contact component-Board! i take the U7501 reconstruct the trace and ressolder the component U7501. After this the board don't start anymore !! already replace U7501 for new on and same history, no fan!!
i already double inspect and don't found more humidity !!!
ppbus, PP3V42_G3H , PPVRTC_G3H, PP5V_S5, PP5V_S4RS3 - ALL OK
MC_ADAPTER_EN, PM_BATLOW_L, SMC_PM_G2_EN, SMC_RESET_L. - ALL OK
only don't have PP5V_S0 !!
any idea???