Try:-
1) Remove power lead
2) Remove battery & move cmos jumper to clear position. Leave for 5~10 minutes, then replace & reset jumpoer
3) have 1 ram module only in black slot, nearest CPU.
4) plug in power lead & try booting. You should hopefully see the overclocking failed message. choose [f2] to load defaults.
If you don't get it to power up, repeat using other memory module.
luck