iMac does not turn on and beeps 5 Times

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iMac Intel 20" EMC 2266

Model A1224 / Early 2009 / 2.66 GHz Core 2 Duo processor

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My early 2009 20” iMac will not turn on. When I press the power button it beeps 5 times. Please help.

I counted again....it was only 4. How do I fix this. I don’t know anything about computers. Your help will be greatly appreciated.

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Dan @danj Rep: 479.9k Self employed contract worker 35 329 971 · Answer 1 · 2017-11-30T07:35:08-07:00

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Five tones are you sure? Here's an Apple T/N on the tone codes: About Mac startup tones

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3 Comments:

5 beeps = Bad checksum for the ROM boot block

Good catch @mayer !

4 beeps = no good boot images in the boot ROM (and/or bad sys config block)