Hey, I have an asus a8n sli-premium, I recently updated the bios and got a "checksum error". I powered down, and wasn't able to start up again. I was instructed to reset the Cmos jumpers, I just found out that i should have removed the battery first. I think my PSU is causing the failure to even start up (the mobo led doesn't light up, and psu fan doesn't turn at all), but could this have been caused by my goof with the jumpers (or when when I get the new PSU will i have boot problems)? Thanks.