[ubuntu] blank screen after install

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http://ubuntuforums.org – i installed ubuntu 12.04 server onto an older pc i had laying around and am getting a grub screen and when i go to boot ubuntu i get a blank screen and then the tv loses the signal from the box. its hooked up rgb and did work fine with 10.04 but i havent booted it up for about 2 months so wasnt exactly recent the last known good boot. im not sure why im even getting a grub screen, ubuntu is the only os loaded and from experience with 10.04, i didnt get a grub screen nor i dont think i should. i did a completely fresh format and install in my installation of 12.04. i only need enough video to s (Hardware)