I dont see how the video card would cause the PSU to shut off after a few seconds... but wierder stuff has happened and I do recall someone on the board mentioning it happening to them and that was the real cause.
If it was brought into myself as a tech back in the days when I was doing diagnostics, I'd start with the PSU, swaping with a known good unit.
Also, take a good look at the cpu mounts. It might be that the CPU heatsink mount has cracked or failed and is no longer drawing heat away correctly because its not in good contact and your CPU is getting hot, forcing a thermal shutdown. this happened to a relative a month or so ago.
Hear that thunder rolling till it seems to split the sky?
That's every ship in Grayson's Navy taking up the cry-
NO QUARTER!!!
-- "No Quarter", by Echo's Children
If it was brought into myself as a tech back in the days when I was doing diagnostics, I'd start with the PSU, swaping with a known good unit.
Also, take a good look at the cpu mounts. It might be that the CPU heatsink mount has cracked or failed and is no longer drawing heat away correctly because its not in good contact and your CPU is getting hot, forcing a thermal shutdown. this happened to a relative a month or so ago.
Hear that thunder rolling till it seems to split the sky?
That's every ship in Grayson's Navy taking up the cry-
NO QUARTER!!!
-- "No Quarter", by Echo's Children