I had the same issue, same MOBO and same system (almost the same, instead of the sempron I had an athlon xp), the heatsink was working fine, it kept locking for a while, then one day as you described it refused to boot, as I forced it, it became unstable, finally not booting anymore.
I took it to the guy I got it from and he said part of the bus for the MOBO was fried, due to high temperatures, not in the processor, but at the chipset, that caused the BIOS to failure, finally crushing the entire system, reflashing BIOS did not solve it. Now I'm looking for a new motherboard as I write this from my notebook. Check the whole sys temperature. I have been running into problems with this kind of MOBO and processor, its the second fried mobo in 3 months, I changed the power supply, changed memory, drives, everything. So, my advice, cool your system... Again, that's my own experience and I just write this because you described exactly what happened to me last week. On 2/16/06, Hemmann, Volker Armin <[EMAIL PROTECTED]> wrote: > sounds like weak/dying PSU. > > Get a new one. Enermax builds good ones. > > Don't buy coba, fortron/sourge. > Be carefull with antec (have 12V problems). > -- > gentoo-user@gentoo.org mailing list > > -- Daniel da Veiga Computer Operator - RS - Brazil -----BEGIN GEEK CODE BLOCK----- Version: 3.1 GCM/IT/P/O d-? s:- a? C++$ UBLA++ P+ L++ E--- W+++$ N o+ K- w O M- V- PS PE Y PGP- t+ 5 X+++ R+* tv b+ DI+++ D+ G+ e h+ r+ y++ ------END GEEK CODE BLOCK------ -- gentoo-user@gentoo.org mailing list