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15 inch "Desk Lamp" iMac G4 700MHz M6498 PowerMac 4,2

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black screen after cleaning

I disassembled and cleaned the dust from a WORKING G4 iMac 700 Mhz with 15" monitor. Now I get a black screen on startup. After the startup chime a pure tone sounds three times. Then the monitor light blinks a repeating pattern: once long, 3 times medium and 1 brief flash.

I re-opened up the case and found no loose connections. This is not a backlight problem.

The tones and flashes must mean something. Anybody?

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crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 0
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Yes

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The three tones are a RAM problem. Reseat your RAM.

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crwdns2889612:0crwdne2889612:0 1

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BTW - did you replace the thermal paste? If not, do so.

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Got it!

Thanks for the reminder on thermal paste.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

I take it the RAM solved your problem?

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Steve Parmenter crwdns2934231:0crwdne2934231:0
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