820-00165 missing pm_slp_s4_l

[MOMOH]

820-00165 MISSING PM_SLP_S4_L however when I trigger the on and off pad L7520 spikes to 5V , any ideas what that means or where I should look further ?

 

[2informaticos]

Check if other coils pulse too.
Also check ALL_SYS_PWRGD and inspect U1950 for corrosion.
Take a look at voltages from page 58 too.

 

[MOMOH]

@2infomaticos okay, will do now

 

[MOMOH]

ALL_SYS_PWRGD pauses , L7560 is steady 3.3V, L7430 pauses as well, ( when I trigger SMC_ONOFF). On page 58 non of the SO RAILS are present , 3. 3V SUS , is present ,3. 3V S4 is present ., 3. 3V S3 SWITCH is 0.063V on page 58

 

[2informaticos]

"pauses"
Pulses???

On page 58 check if S3 and S0 volatges pulse at least.
Be sure no short on any output rail.

Pin 3/U1950 pulses?
What about CPU cois (L7310/20)?

"and inspect U1950 for corrosion"

 

[MOMOH]

S3 AND SO PULSES WHEN I TRIGGERED ON/OFF PAD , PIN 3 OF U1950 PULSES and no signs of corrosion , L7310/20 all pulses when I trigger on/off pad ... I could not find a short on the output

 

[2informaticos]

Then all voltages from page 58 should pulse too; apart of the steady ones.
Try new BIOS; search on the forum, already something uploaded.
Also try to start in SMC bypass mode.

 

[MOMOH]

does shortenings the on/off pads not same as SMC BY PASS ?

 

[2informaticos]

Search the forum, or use Google.
You cannot waste time for a confirmation, when you can get it yourself in a minute...

 

[MOMOH]

Thank you , sorted