I have a customized computer

intel core i3
Ati Radeon 5673
Intel dh67vr
1 TB hardrive

I updated my bios it completed sucessfully but when it reboooted my monitor keeps on saying no input then goes to sleep. Please help!

Did you happen to have a problem with your previous BIOS version that made you update it?
In my experience people only update their BIOS if they happen to have existing bugs or if it was really recommended in a software update
did you backup your previous bios?
did you download it, have you had any contact with the technical support for your system that helped you with the update (e.g. chose which BIOS version, etc. )?
are you sure you used the correct version for your system?