Power light flashing on after mac mini crashed

using my mac mini (late 2006) - it just crashed and switched itself off, now when I try and switch it back on it does nothing - no sound, just the power light at the front blinking on and off - any ideas what I can try and do?

Do the Flashes match any tone sequence?
The old ones sre...
an you count the beeps or flashes?
1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable
In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.
Note: In this case, a flash is considered to be 1/4 second or 250 ms or greater in length.

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