820-00165 green light, no Fan/power

iClub

Member
Hey info, this mac used to turn on, but I ended up changing some components, it stopped turning on. I replaced u1950, U1900 and U8005.


PM_SLP_S0_L 0V, no pulse when SMC_ONOFF is triggered
PM_SLP_S3_BUF_L 0v, NO PULSE
PM_SLP_S4_L 0V, no pulse
PM_SLP_S5_L 0V, 31mV
PM_SLP_SUS_L 0v, 68mV
PM_PWRBTN_L 2.885V
PM_RSMRST_L 3.28V
S5_PWRGD 3.4V
PP3V3_SUS 3.32
PP3V3_S5 3.32V
PPVRTC_G3H 3.32V
PPVOUT_S0_PCH_DCPRTC 1.56V
PCH_CLK32K_RTCX1 0.521V
RTC_RESET_L 3.31V
PCH_SRTCRST_L 3.31V
ALL_SYS 0V,no pulse.
PLT_RST 0V, 600mV pulse
PPbus 8.6V
pp3v42 3.4V



L7560 3.3
L7430 0V, 65mV
L7630 0V, no pulse
L7310 0V, 53mV
L7320 0V, no pulse
 
Last edited:

2informaticos

Administrator
Staff member
You've forgot to check 2 (two) RTC signals.
Also check PM_BATLOW_L and PCH_DSWVRMEN.

Please post accurate information.
How can you get 3V3_SUS and PM_RSMRST_L high, with 0V at PM_SLP_SUS_L???
 
You've forgot to check 2 (two) RTC signals.
Also check PM_BATLOW_L and PCH_DSWVRMEN.

Please post accurate information.
How can you get 3V3_SUS and PM_RSMRST_L high, with 0V at PM_SLP_SUS_L???
i have the same problem
how to check this PM_BATLOW_L and PCH_DSWVRMEN.
did u mean need to test the voltage?
 

2informaticos

Administrator
Staff member
Please, open new thread with your problem.
Don't forget to read this...

BTW, do not quote an entire post, visible few centimeters above.
 
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