Help please. My G4 mini won't boot.

[or_astroman]

I really don't want to put the old warhorse down but my G4 1.5ghz mini will no longer boot. It will turn on and it will chime but it just hangs on the grey apple screen(tiger) forever. Safe Mode does not work and it will not launch from the restore disc either. I am at kind of a loss.

There was a black out right before this happened but that is the only anomaly that occurred close to it's presumed demise. It has never been upgraded and has never had it's case opened. HD failure? Ram fail? any ideas?
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Young Buck 2.53Ghz Intel Core 2 duo (late 2009), Enhanced USB Monica.

Veteran 1.5Ghz PowerPC(Stock)

[Smithcraft]

I presume you've tired the PRAM resets, and any other assorted hardware resets?

SC
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Grumpy old man of computing.

[Desktop] G4 mini - 1.5Ghz 1GB 80GB HDD - Newer miniStack v2 500GB - 10.5.8

[Media System] Intel i5 mini - 2.33Ghz 8GB 500GB HDD - 4 x Hitachi 2TB HDD in a qBOX-SF - 10.7.5 (Thanks Phil!)

Make sure it has pins!