if a cmos battery is dead or very low battery, can it cause problems of a pc not booting up properly as in no signal from monitor, no key board activity an not loading up? ive had this problem a few weeks ago but after taking everything out and plugging it into a different outlet it worked until power went out for around 12 hours today. power did come on for like 5 mins but went back out, pc was in the process of booting up when power went out again. also bear with me the laptop im on many keys wont work due to a curious cat and im using the on screen keyboard to type. thanks for any help you all can give!!!