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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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The three tones are a RAM problem. Reseat your RAM.
Был ли этот ответ полезен?
BTW - did you replace the thermal paste? If not, do so.
Got it!
Thanks for the reminder on thermal paste.
I take it the RAM solved your problem?
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