So here are the things I followed through:
- Connected the same power supply to another system and it powered up just fine - so not a Power supply issue
- Cleared CMOS Mem, disconneted all other devices, memory, system fan. Only left CPU fan on. (EVen disconnected USB and speaker connections to the front panel). Still no power or no beeps, no fans starting. Eliminates CMOS issue
- Disconnected the front panel 'power swich' from the board Panel1, shorted it maually with a jumper with power turned on (everything else is still disconnected) , still no power, no fans starting, nothing. So it wasnt the front panel power switch
- Checked the power siwtch and reset switch also on a meter, connected (closed) fine when pressed.
- Connected another power supply from a working system. Still motherbaord does not turn on.
- Turned the power on with original PS and checked the voltage reading by meter at the leads on the bottom side coming from ATX1 and ATX12V connectors. Meter registers only ~1 V where it should register 12 V (Pin 10 on ATX1, or Pin 3 / 4 on ATX12V connector, which is a 4 pin converter). It registers ~ .25V where it shoudl have ben 5V (Pin 9 on ATX1) and vey low at pin 1 and 2 where it should read 3.3 V.
- All theses tests were done outside the box (which means the case is not shorting the board)
- The only thing i have is the power supply has 20 pin male connector, whereas the MOBO has 24 pin ATX1 female connector. But the manual says you can use the 20 pin (just leave the other 4 pins open, as long as the power is > 300 W)
- I have 1 G DDR II PC 4200 memory (1) but have disconnected it for all the above testing.
Looks like it is a bad motherboard. Or may be the CPU? How do I pinpoint it if its MOBo that I need to take back or the CPU. Or is it something else?
Can you help if it something else, and if not how do I determine if it is the MOBO or CPU?
Thank you for your help.
Anything you can suggest?