BIOS will not boot! help?

When you remove the battery did you also unplug the ATX power connection? Do this and wait for a good 5-10 min just to make sure any capacitor on the motherboard is completely drained of energy.

I had this same problem on a Pentium 3 (back when they were good) and it seemed to fix things.

Another thing you may want to check for is if the ram some how got corrupted. Just use one stick of ram and try every stick. Just to make sure that one isn't bad. Also try booting without anything on the IDE. All these things can make a BIOS not post if something is wrong.

wth your graphics card doesnt have a bios:S

and if you werent wearing a anti static wristband then that may have easily just destroyed your machine -.-

have you tried taking the LAN PCI card out and booting again??

it may be that one of the sticks of ram went by chance. take the stick closest to the cpu out and move the stick furthest away to the one you just took one out of and then leave the other stick out and see if it boots.

if you were fideling with the PC while power was running through it i.e didnt take the power lead out of the PSU when installing new hardware(power is always running through your system unless you do this or some PSUs have on off switches on the back) then that will have done some damage.

try unplugging every power connector leaving it for a half our than plugging every connector back in and booting again.

Your motherboard is under warranty, just take it to the retailer