# Cmos.... or bios

**URL:** <https://forum.kirupa.com/t/cmos-or-bios/83145>\
**Category:** Uncategorized\
**Created:** [March 16, 2005, 3:14pm UTC](https://forum.kirupa.com/t/cmos-or-bios/83145 "2005-03-16T15:14:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![uber1](https://avatars.discourse-cdn.com/v4/letter/u/779978/32.png) [@uber1](https://forum.kirupa.com/u/uber1)\
**Post date:** [March 16, 2005, 3:14pm UTC](https://forum.kirupa.com/t/cmos-or-bios/83145/1 "2005-03-16T15:14:24Z")

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i’ve been out of the pc fixing game for a while… so i gotta relearn some stuff… a friends computer won’t start up… nothing happens… earlier… i guess a power surge messed up the computer and reset the cmos settings… i fixed that… then they mentioned that the system clock is slow… its been a few weeks… but now the computer won’t start… they have and old built pc… so replacing the bios chip is a no go… but the cmos battery might work…

my question is… will a dead cmos battery prevent the pc from starting? i used to know… but like i said… been out the game for a while… and i’m in stupid mode