PowerPC G5 1.6GHz not starting up..please help!

Hello everyone

I should firstly add that I have been having display trouble for a few years now (only showing video after a few restarts), so this may have something to do with what happened the other day, which is as follows:

I was online but on the phone to a friend, then all of a sudden the fans of my PowerPC G5 started going wild, as if the room temperature rapidly increased (I've had this issue before too). The screen cursor from my tablet pen (little arrow) was frozen (don't recall this happening for a long time), so the only thing I could do was a forced restart from the main power button at the front of the G5. It did start up again, but with messed up video (as if I pulled the power cable out of a TV). I thought not to worry, as I usually have video issues and a few restarts usually sorts it out, however the next forced restart produced no video (just a black screen) and more to my concern, no white light or start up chime! Following restarts have been the same.

There is a start up sound when I press the power buttton (I think maybe some brief fans as well), but no light or that power on chime noise. My feeling is that I now have the original video issues combined with a failure of somekind! Please help as I am really worried that this might be something serious.

Does this sound fixable to you guys??

Thanks for reading,

Adam