820-00165 (Bouncing Betty)

[KC Micro Tronix]

This board is a pain in my ass! quick 300mA bounce. No shorts, All rails measure good for the brief time they are alive. All SYS PWRGD is present "while it in the bounce". I cant find anything wrong with the ring of fire "3V3 switches" I checked SMC Logic.

Something is shutting this machine down. Does any one have input?
I have posted a video on my channel if you want to see it in action.

https://www.youtube.com/watch?v=GdMvaAZr3Nw

I really hate boards like this! At the moment I think I am madder at my Magic Trakpad in Windows.

 

[jadao]

Does the board run in smc bypass mode?

 

[KC Micro Tronix]

No it does not.
Tried that

 

[2informaticos]

So it stays on starting in SMC bypass mode?
I'm not sure about your reply.
If yes, then SMC sensor issue.
Start checking AVREF_SMC presence.

If never stays on, then try known good BIOS; full file, not only cleaning ME.
Also reball, or even change SMC.

VCORE pulses too?
Check for pulse at pin 3 of U1950.

 

[KC Micro Tronix]

in SMC bypass the failure is the same.