Hello, thank you for your input.
I forgot to mention that my friend's com unable to display graphic when on, fan speed always at max, and seems to be on a loop. Fan will be blasting at max and slow a split second and max again, continuously. MB has no video port, so unable to test. But highly suspect MB uplorry already, so thats why need to change MB also. Any recommendations for MB+Cpu?
1) G3240 + Asrock H81M-HDS, $152.
2) Boot loop?
i) Reseat all connections in your friend's rig.
ii) Reseat RAMs, rub gold contacts with clean eraser. May want to use 1X RAM stick at a time and try different RAM slots.
iii) Bring your PSU to your friend's place and use your PSU on your friend's rig and see if it is PSU issue.
iv) May want to bring thermal paste and isopropyl alcohol in case it is dry thermal paste causing CPU to overheat.
v) If all else fails, disassemble rig and setup a barebones setup consisting of the CPU, mobo, CPU cooler and your PSU. Keep the front panel connections to the casing as you will need the switch. Switch on the rig to see if there is boot loop. If no boot loop, got beep, slowly add more components until boot loop occurs or rig can startup.
vi) If bootloop still persists in the barebone setup, bring the CPU, mobo and CPU cooler to PC Care & Solutions, #02-32, SLS, and have Nigel test your parts to see which parts are still working. If CPU is still working, buy Asus M5A78L-M LX V2 for $97 instead and use the Phenom II X2 555 with the AM3+ mobo. The M5A78L-M LX V2 is compatible with both AM3 and AM3+ CPUs and thus allowing you to save lots of $$$ from buying a new CPU+mobo combo.