I can't explain the timing, but the Last time I saw something like that happen, it was because I had some memory go bad. You might want to check and see if your memory is OK. Of course, there are at least 40 kajilion (technical term ) possible reasons that the computer won't post, but the memory might not be too tough to check out.
__________________
My SEIV Code: L++++ GdY $ Fr+++ C-- S* T? Sf Tcp A%% M+++ MpT RV Pw+ Fq Nd- RP+ G++ Au+ Mm++(--)