Will bad Bios may start Computer?

[Enoch]

I had change cpu. now PC is not booting up. acts dead. Everything works fine even dvd drive opens/closes, but thats it. wondered, old pc. had disconnected. if bios battery dead, would this cause pc not to boot?

[Eaton]

No, he battery just holds the settings if the machine loses power. As long as it is plugged in and has power it will store the BIOS settings. Now if it loses power and the battery is bad, then it will automatically set to default, which could cause your computer not to boot if you have some weird default configurations.

I would suspect your problem is something else.

[Majestic]

should boot up fine first time, doesn't need to install drivers or anything so there shouldn't be a wait.

Sounds like a motherboard issue, or you could try reseting the cpu.