Change in bios and I cant boot now

[Wade Smart]

20081225 2029 GMT-5

I got my son a graphics card and maxed out his ram at 4gb for Christmas. 
We wiped his hd clean and then went to duel boot xp and ubuntu. 
Everything was great until we booted into the bios and he made a change: 
  VGA Memory > 64mb to 0mb.  He thought since the card had 1gb of ram 
that he could recover that 64mb. Well, when the computer starts, the 
screen lights up with the manufacturer logo and then displays "no signal".

How can you recover from a bios mistake?

Wade
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Registered Linux User: #480675
Linux since June 2005