ModdIt
Hi JK do you have the manual already. I think below is correct.
http://all-guidesbox.com/download/868122/via-technologies-vt8237r-manual-48.html
If not done already please take a close look at the capacitors near the big power connector,
check for bulging leaking or swollen. If you find any of those issues better to replace.
I would also renew the paste between processor and cooler, it may be many years old already.