My eMac is "blinking!" And it scares me...

As if it's shutting off, or about to-- I at first thought that my power (in the house) was going out for a split second, but that's not the case. The eMac makes a loud (sort of) popping or blinking noise and blinks for a split second.
What the **** is this about?
HELP!
And thank you all ahead of time,
Rick Lopez

bb10k,
Welcome to the Apple Discussions!
Is this a one-time thing or is it happening regularly? What model eMac do you have (e.g., the CPU clock speed, which you can add to your profile)? Is the eMac is a dusty and/or smokey location? There have in recent years been a few reports of eMacs popping and apparently arcing from the CRT/analog assembly to the inside of the case, often associated with unusually heavy accumulations of dust and/or tobacco smoke. If it's a one-time thing, it's unnerving but not fatal. Some early eMacs were affected by a popping / loss of video problem, but your eMac would have to be at least three years old to be one of those affected and you would expect to have seen that problem before.

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