Dell Optiplex GX150 Splash Screen showing random symbols

[kaiamacejkovic]

I've got a Dell Optiplex GX150 with the DELL Splash screen showing some funky symbols across the display.

BIOS Revision A07.

Does anyboey know what can be the cause of this, as well as the resolution? What happened to this machine was that it had the RAM pulled out of it, and when I installed it back, none of the boot devices were recognized. I ended up having to disable them all and then re-enabling them one by one to get them to work.

But now the funky symbols # * etc are still showing across the display :/ Any ideas anyone? Thanks in advance~