820-3536 water damage no pp5v_s4..

[yair37]

hi all,the board come dead, just green and then orange, there was very small water damage at r3700(replaced+wire) and near c1905 and 1910 replace both and also replaced u9100. after that i was run o.k nut problem with the power button just shot it off but not turn it on, even from smc_on/off on board...
not still green/orange but not turn on and missing pp5_s4..

 

[yair37]

no short on pp5_s4

 

[yair37]

also missing voltage PP5V_S0 - PP3V3_S4 - PP3V3_S3 - PP3V3_S0 - PP3V3_S4SW_SNS

 

[2informaticos]

Check if PPVRTC_G3H is present.
If yes, check the 4 RTC signals...

 

[yair37]

PPVRTC_G3H 3.2v
RTC_RESET_L 3.3V
PCH_CLK32K_RTCX1 0.5V PAD 12 ON U1900
what did i miss?

 

[2informaticos]

Only 3, PCH_SRTCRST_L, PCH_INTRUDER_L and PCH_INTVRMEN.

I'm always asking how can Intel draw the RTC block to make these signals more visible.
Maybe a note liek "Hey, we are the 4 RTC signals placed very close together in the same PCH (RTC) block"...

 

[yair37]

PCH_SRTCRST_L - 3.2v
PCH_INTRUDER_L - 2.9v
PCH_INTVRMEN -3.3v

 

[2informaticos]

Post the basic signals from power on sequence...

 

[yair37]

ppbus_g3H 12.6v
ppbus_S5_hs_computing 12v6
ppbus_s5_hs_other5v 12v6
ppbus_s5_hs_other3v3 12v6

ppdcin_g3H_iosl 15v
pp3v42_g3H 3v4
ppvrtc_g3h 3v3

PP5v_s5 5v
pp5v_s4 0v
pp5v_s0 0v
pp3v3_s5 3v3
pp3v3_s4 0v
pp3v3_sus 3v3
pp3v3_s3 0v
pp3v3_s0 0v1
pp1v35_s3 0v
pp1v5_s0 0v

 

[2informaticos]

You already said the nboard doesn't even start; why then spending time posting (missing) S3/0 voltages?

If you post PPBUS_G3H and 3V42_G3H measured in various points, also useless; one point is good enough.

Power on sequence I meant signals, not voltages.
Post PM_BATLOW_L, PM_DSW_PWRGD, PM_RSMRST_L, PM_PWRBTN_L.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L.
If yes, check for pulse at each PM_SLP_Sx_L signal at same time.