Hi! My mother board model is P4i45GV ASRock. My system does not work untill i remove the CMOS battery and refix it. when i shut down my system and again press my reset or power botton it does not work. Every time I have to remove and agian insert the CMOS battery to start my system. And also every time i have to set up CMOS setting. After this i don't have to press my pwr or reset button to start my system, It starts automatically when power is given to system.
Are you sure the CMOs battery is till OK ? If it looses power then incorrect settings may be in use by the Bios thus it fails to properly start your computer. This may especially be a problem if your memory needs increased voltages than standard memory or if you're overclocking.