Ubuntu Installation :: 10.04 Installs Successfully But Does Not Boot Upon Reboot

Recently I have built an old pc using bits and bobs that have been collecting in the garage for years and decided to try and turn it into a file server, and to get some experience in networking etc. Now I had a choice of 2 motherboards for the system:

1.)gigabyte ga-8siml
2.)elitegroup l7s7a2

I first built the pc using the gigabyte board,install was successful and ubuntu server booted on restart. The only problem was,there is no onboard lan on the board and the only spare wireless pci card I found was completely frazzled. Rather than buying a new wifi card to get the system running, I thought I would try the other motherboard since this had onboard lan. The elitegroup motherboard however does not have onboard vga, so I dug out an old agp ati radeon 9200se 128m ddr tvo graphics card and plugged her in. The install went fine,but after a restart, I'm left with a blinking cursor at the top left of the screen.

If I hold down 'shift' for long enough I can bring up the grub menu,but if I select anything I get no signal on the monitor. After a while on the blinking cursor screen the monitor will time out to no signal on its own. I have tried the installation using different combinations of the options given by F6 of the first installation screen but to no avail. I have also tried installing the generic kernel as opposed to the generic-pae.