iMac does not turn on and beeps 5 Times

Question

iMac Intel 20" EMC 2266

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

crwdns2934065:0crwdne2934065:0: 1

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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.

crwdns2934109:0crwdne2934109:0

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score 0 · Answer 1 · 2017-11-30T07:35:08-07:00

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35

330

971

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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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crwdns2889612:0crwdne2889612:0 0

crwdns2944067:03crwdne2944067:0:

5 beeps = Bad checksum for the ROM boot block

crwdns2934271:0Huk 30, 2017crwdnd2934271:0 mayer crwdne2934271:0

Good catch @mayer !

crwdns2934271:0Huk 30, 2017crwdnd2934271:0 Dan crwdne2934271:0

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

crwdns2934271:0Huk 30, 2017crwdnd2934271:0 mayer crwdne2934271:0