MSI K8N Neo (Socket 754) boot problem

[jtctolits]

This motherboard together with Athlon 2800 were given to me. The problem of this mobo;

- when i power on the AVR, without out pushing the power button of the cpu, it will power on immediately(cpu fan spinning) for 3 seconds. then power off.

- then i push the power botton (after the cpu fan stops spinning), it will power on but; no display, no beep. The cpu fan just keep on spnning without booting.

Troubleshooting done:

- clear CMOS;
- change CMOS battery;
- reset memory;
- reset processor;
- change power supply;
- i already workbench the unit with only the mobo, proc, mems and VC

but still the problem still persists

I did not see any bloated caps, the caps in the CPU area are 4 Rubycon 25V 820 mf, 8 Panasonic 6.3V 1500mf. The rest are OST's.

TIA guys

[kc8adu]

Re: MSI K8N Neo (Socket 754) boot problem

got a post card?

[jtctolits]

Re: MSI K8N Neo (Socket 754) boot problem

@ kc8adu

i do not have a post card. i tried putting a PCI video card (S3 Trio) but to no avail

here are the hardware;
- MSI K8N Neo
- Athlon 2800
- Kingston 512 mb DDR1
- ATI Radeon 9250 AGP
- Hec Raptor 500watts

[brethin]

Re: MSI K8N Neo (Socket 754) boot problem

The board has a short somewhere. It should not power on like that unless the bios is set to return to last state. Since you cleared the CMOS the default setting for that is to stay powered down. I had that same board with that same exact issue. Never did find the short.

[jtctolits]

Re: MSI K8N Neo (Socket 754) boot problem

i noticed that when i plug the CPU fan to the northbridge fan (3 pin) connector, it will not spin, thus, there is no power coming out of the northbridge fan pin (3 pin). It might be the north bridge has screwed.

[ant3202]

Re: MSI K8N Neo (Socket 754) boot problem

it maybe VRM IC chips module been fried