820-3115, No Chime, No Lqd, Vcore Present

[SMMRepair]

Got sort of a perplexing one here; hoping it's not a dead CPU.

1. Board has no history of liquid or drop; previous owner said it simply stopped booting one day.
2. Board powers on, ALL_SYS_PWRGD present and steady (3.3v), VCORE present (~1.19v), CPU gets appropriately warm.
3. No chime, white sleep light stays on.
4. No chime even without RAM installed (ugh)
5. No sign of liquid anywhere at all; no discolored probe points or sign of any residue at all. Very clean.
6. Replaced BIOS (even though I had no chime w/o RAM, just to see) and replaced Clock. No change.

Since I have ALL_SYS_PWRGD and VCORE, I'm not really sure what else to check. Were this one liquid, I wouldn't waste my time, but this one has a seemingly clean past.

Any advice appreciated! Hoping this one isn't a dead CPU; sort of seems like an issue with the MEM circuit; I'll check there next and see what's up, although I thought that since I have ALL_SYS_PWRGD, my MEM circuit should be all good, correct? Otherwise my all_sys_pwrgd would be pulled down, or so I thought. Thanks in advance for any assistance!

 

[dukefawks]

Could be absolutely anything. I doubt this will be worth the time wasted. Most likely PCH or CPU issue, but could be anything else.

 

[SMMRepair]

Thanks, Duke. Was hoping it was a simple cap knocked off somewhere, but no dice. Going to call this one a no-fix as I somewhat expected; thanks, Duke!