Powermac G4 booting but not showing video?

[gibbo132]

My Powermac G4 400mhz Sawtooth is not showing any video. The mac 'bongs' and you can hear that it is powered up however it will not display video. Last night it was displaying video fine however. It did have a kernel panic but I think that was due to me plugging in a external hard drive. Any help would be greatly appreciated as was about to sell the mac as I bought it for fun and it is simply a money drain now!

Thanks
Chris

 

[gibbo132]

Would buying a new graphics card fix the problem? I really need to know as its about to be sold.

Chris