EMac won't start after replacing RAM

I bought a 512mb ram to install it, so it'll be 768mb.
I stupidly took out the original RAM first before installing both RAM. The ejector tab just wouldnt fit in snugly to the side of the ram.
After starting up the emac, i get a "toot" sound and two flashes, the flashes repeats after a few seconds.
I'm not sure whether it's because the RAM did't fit in properly or whether i fried something.
I appreciate any help.
Sorry if my english sounds weird, it's not my first language.

In addition to roam's usual excellent advice, make sure you have the right RAM for your model eMac. You can use eMac: How to locate the serial number and identify your model to check the model, use Crucial to check the required RAM specs, and eMac - Do-It-Yourself to review the installation steps (the movie links usually seem ike overkill but could be handy here).
You can also refer to Power On Self-Test Beep Definition.
p.s. Welcome to the Apple Discussions!

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