I turned on my computer this morning and I received an 3-4 error, which was no issue remove the ram stick in slot one and be done. But after trying my computer again I received the error code 1-3-4 which was supposedly my video card, which I removed. Turning on my computer for a third time gave me the error code 1-2-3 and the on-board graphics displays a series of !'s all over the screen. I am stumped for what to try next. 

Specs:

*Viotec 550W PSU

*3 Gb DDR2 (now) of RAM

*Intel Core 2 Quad Q9400 (I believe)

*2 CD/DVD RW drive and 2 hard drives.