I'm a sufferer! Cold boot fails every time (incl. after BIOS changes), PSU off & on again 2-3 times normally cures it.
My system:
BE7 (CG BIOS), P4 2.4B, XMS3200 512 C2, Leadtek A280 GF4 Ti4200 128, Thermaltake SilentPower 360W PSU, Maxtor 5400rpm 30Gb, LG CDRW.
I'll try reseating the power...