have you tried building the system outside the case. Use a different power button to eliminate that as a possible problem.

Mackya wrote:

Matsonic MS-7380SGMatsonic may be owned by Pc-Chips

Matsonic = Pc-Chips = garbage
probably bad capacitors, but even if you repair it you will still have a sis chipset waste of time

canthearu wrote:

have you tried building the system outside the case. Use a different power button to eliminate that as a possible problem.

It is a brand new case, so I was not thinking it should be a problem, but I can unseat the motherboard and make sure there is no metal contact interference.

rasz_pl wrote:

Mackya wrote:

Matsonic MS-7380SGMatsonic may be owned by Pc-Chips

Matsonic = Pc-Chips = garbage
probably bad capacitors, but even if you repair it you will still have a sis chipset waste of time

Oh yes, that is true, it does have a SIS, though I have my Voodoo 2 that was going to replace the on board video. The motherboard was working up until a few days ago, which is the vexing thing. Though that was on the test bench, so it could be some kind of interference. None of the caps are swollen, they look ok, but I can double check. 😀

Intel 440LX/BX is better.

when you say 'shuts off' you mean PSU turns off, computer resets, or the screen just goes black?

rasz_pl wrote:

when you say 'shuts off' you mean PSU turns off, computer resets, or the screen just goes black?

Thanks Rasz, I just put it on my rubber table, and tried to boot that way, no go.

I can furnish a video, but it begins to boot, then immediately shuts off, the board, power supply, etc. everything.

Tried without the power button by jumpering the pins to start, no go there either. I looked for broken traces and things as well, but no it looked ok. Caps seemed ok, no swelling or deformity.

Actually it gave me 2 beeps recently, so maybe the on board video is DOA, according to the Award Bios screen, though didn't think it would display the P2 - 450mhz Award BIOS blah blah POST screen.

Bleh, running out of ideas.

This sounds more like a power supply issue. Try a different PSU if you have one.

Thanks. ^^ Though actually that was one of the first things I tried.

(I mentioned it in the first post.)

But I bought a brand new 600 Watt Power Supply and had the same result.

Edit: Just pulled it out in the rubber table and tried the new power supply just to be thorough. Still no dice 😒

Had an Abit KT7A do this to me - not starting at all or shutting down randomly after seconds/minutes/hours... After a full re-cap/polymod I nearly gave up on it. Incredibly, it was caused by a defective Clear CMOS jumper that only made intermittent contact.

Oh wow! Fascinating, I just pulled the jumper completely and it stayed powered on at least.

I will try and jumper the normal CMOS pins and see if it boots.

Edit: Nope xD soldered the CMOS Normal pins and still no go. When it does stay on long enough to boot more I get 3 beeps which looks like bad video memory.

That shitty SIS chip is probably messing things up?

Try leaving the jumper in but pull out the CMOS battery?

you can always try sticking random isa/pci graphic card
post code card wouldnt hurt

Thank you for all the suggestions! :3

This past weekend I pulled my Voodoo 2 from storage, and now it boots. Weird.

Now just need to install Win98 on my HD and I should be good to go. :3