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Helpful answers
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Aug 1, 2014 5:54 AM in response to SamskieAikaby a brody,No iMac G4 is 1.8 Ghz. You may have an iMac G5.
The G4 is a Dome with an articulating silver arm behind the LCD that allows it to face every direction except to its rear.
The G5 is an L shaped stand. So assuming your spec is correct, it likely is a G5. PPC is PowerPC, which can be G3, G4, or G5.
Some Intel iMacs look like G5s on the outside, but the fact you got PPC, strongly leans towards your having a G5.
My guess is this thread may hold the answer:
To verify your machine age and model, see this tip:
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Aug 1, 2014 6:15 AM in response to a brodyby SamskieAika,Yeah it's a G5 sorry for the typo there. When I checked the serial number it specifically said "OBS,IMAC G5 ALS (17-INCH)". I don't know if that helps at all.
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Aug 1, 2014 10:24 AM in response to SamskieAikaby a brody,Ah, that's the Ambient Light Sensor model. So actually it is not the original iMac G5, but the second model to be released. Have you made sure the PRAM battery is under 5 years old, and checked this article to see what the number of flashes you are getting corresponds to
Power On Self-Test Beep Definition - Part 2
Note it says "on some computers the power LED will flash a corresponding number of times plus one. "