Power cut and now freeze mid start-up

Help, help, help!!!
I had a power cut today and my mac obviously turned off!! When I try to re-start it it comes up with the apple pic and starting Mac OS X window and then goes to a blue screen and freezes. I have booted off the install disc and that worked - I ran disk utility / first aid and it came back with no problems on the hard disk. I haven't got enough room on the hard disk to re-install OS X (Im running 10.4.6 if that is relevant)??
Does anyone have any suggestions of what else I can try? I really need my beloved mac to be up and running!!!
Many thanks in advance
Becki
G4 tower   Mac OS X (10.4.6)  

Power hits can do crazy things to machines. It looks like you're stuck with trying out various things to see if they are the problem. So...
1) Try pulling out all the RAM sticks but one (maybe a RAM stick got smoked).
2) Try removing all external peripherals except for the mouse and keyboard.
3) Try seeing if all your fans are running (cracking the case open before you turn on the machine can help). Some freezes happen due to overheating.
HTH,
~FifthWheel

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