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-   -   powermac g4 quicksilver beep on startup.... (http://forums.macnn.com/65/mac-desktops/499024/powermac-g4-quicksilver-beep-on-startup/)

 
rich82fox Mar 19, 2013 04:26 PM
powermac g4 quicksilver beep on startup....
hi there

I acquired a Powermac G4 quicksilver (innice condition)

but when I press the power button it gives one beep and the power button flashes on and off

does anyone know what one beep means?

I have taken out and reseated the RAM and swap the RAM sticks over - but it still gives a beep on startup - and nothing comes up on screen

Richard
 
reader50 Mar 19, 2013 05:42 PM
How many flashes? They'll repeat.
 
rich82fox Mar 26, 2013 05:19 PM
re:
Quote, Originally Posted by reader50 (Post 4222485)
How many flashes? They'll repeat.
one beep and then the power button flashes twice in succession (two flashes = pause - two flashes - pause)
 
rich82fox Mar 26, 2013 05:52 PM
re:
I tried swapping graphics cards - same thing

I tried swapping/reseating the RAM -same thing

I tried removing the pram battery and pressing the reset button on the logic board - same thing

anyone have idea what could be the problem?
 
Mike Wuerthele Mar 26, 2013 09:40 PM
Toughie. I'd start with a replacement power supply if you have one handy. Otherwise, I'm guessing motherboard.
 
reader50 Mar 26, 2013 10:02 PM
1 beep, 2 flashes = no RAM installed or detected.

Try booting with a single stick of RAM at a time. Try with different sticks.

If you're lucky, a single bad stick is holding everything else up. If you're unlucky, the memory controller is gone. Since it's soldered down (part of the northbridge chip) that means motherboard failure.

note: the QS takes PC-133 SDRAM unbuffered, no parity. Max size 512 MB per stick (1.5 GB max overall). In practice, it takes up to 256 MB sticks, and accepts "low-density" 512 sticks. Which turned out to be uncommon - most 512 sticks will recognize as 256 sticks, or not be recognized.
 
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