EMac won't power up

I am assisting a small school with an eMac that will not power up. When the power button is pressed, the led lights up. There is a single beep, it is not the startup chime. Nothing else happens boot wise. The led will flash twice and then stay on, then flash twice, repeat.
I didn't want to rush right to the PMU switch as this seemed to be some sort of "beep code", if you will. I could not find through searching, any description of the flashing led.
Thanks for any help.
Steven

Steven,
You're correct that the single beep on startup is an error code. Refer to Power On Self-Test Beep Definition - Part 2. A single beep (or the double LED flash) indicates no valid RAM is recognized. It's possible that the RAM in the Mac isn't seated fully in the DIMM socket; the thumb catches have to be snapped completely shut. Try pulling an reseating the RAM; instructions are at eMac - Do-It-Yourself

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