AN8 ultra v1.0 with on/off issues, maybe memory issues as well

[windmike]

I'm in the eastern US so if this forum is Europe only, let me know.

I have this AN8 ultra that has worked quite well in the past, but now has the following issues;
- will not cold start with the power button unless you first turn the PSU off then back on. When you power off the board, it shows a 9.9. on the POST display and won't start from the power button. After off/on with the PSU, it displays 0.1. and will start from the button. And sometimes, it will start on it's own when you cycle the PSU back on...without the button.
- I don't think it likes the memory I'm using - it's Kingston Value Ram, DDR400 CL3 in 4 512 sticks. It won't post unless all 4 are installed, and I mention it only because it might help diagnose. The memory I used to have in it is gone (sold) and I don't recall what it was.
- also, and a minor squawk, is the Audiomax 7.1 card has never worked...but I can live without that.

The power on/off is the main issue. I've tried 3 PSUs, including the one that's always worked in the past; Cooler Master 450W (better quality, I think), Enermax 350W (maybe too small), and a Powmax 500W. The last two have only 20-wire power leads, the CM has 24...which doesn't seem to matter. They all work and they all have to be cycled on/off to start from the button. The video card does not seem to be an issue - it's an ASUS Radeon 300SE 128mb PCI Ex x16. Processor is AMD 3400 Venice.
So far, I have flashed and re-flashed the BIOS, now 21. I have reset the CMOS, pulled the CMOS battery for 5+ minutes. I have booted with only CPU, then with memory, then vid card, and all the POST readouts are as suggested by posters in this forum...nothing odd. I've gone into the BIOS and set to 'Fail-safe Defaults' as well as 'Optimised Defaults' with no change.
I'm stumped and hope someone on here can help, or give me some further diagnostic steps to try. I do have access to some other makes of RAM, if you think that's worth trying.
Although this is not an OS problem, I currently run a Debian linux OS, and have run several WIN OSes on it.

cheers
Mike

[abitlover]

Hi. That mobo is 6 years old. Time for a change.

[windmike]

Actually I already knew how old the board was...after all, I bought it. If this is not the right forum for getting help on OLDER BOARDS, just let me know and I will gladly wander off elsewhere to get assistance. If real help is available here, I'm all ears.

thanks,
Mike

[abitlover]

Actually I already knew how old the board was...after all, I bought it. If this is not the right forum for getting help on OLDER BOARDS, just let me know and I will gladly wander off elsewhere to get assistance. If real help is available here, I'm all ears.

thanks,
Mike

No offence. Looks like board has had its time.

[ABIT Sean]

I think the motherboard is just showing its age. Its possible that some of the CAPS are failing and thats why you are having cold boot problems.
You could spend an age trying to pin point the issuse but @abitlover might be time for un upgrade.