gsacks wrote: > > On Aug 16, 9:33 am, Dan <[email protected]> wrote: > >> At 9:35 PM -0700 8/15/2009, gsacks wrote: >> >> >>> 733 mhz Quicksilver >>> bad RAM and a bad hard drive >>> >> Both were bad?! >> > > Yes, one stick of memory was bad (as per memtest) and the hard drive > had errors that I couldn't correct (I don't have any 3rd party > software for this, and I had spare drives anyway). Couldn't bad memory cause > disk problems? > Absolutely. I had once had a DA with a bad RAM stick and it wreaked havoc on 2 different HD's. > >>> so I replaced them and it worked >>> for a couple of months. After that it wouldn't start up at all -- the >>> light on the switch comes on and the fans spin for a few seconds, then >>> nothing. I checked the voltages on the power supply and they seem >>> fine. From various sources on the web, I surmised that either the >>> logic board or the processor was dead. Fortunately, I have a working >>> QS 2002 with an 800 mhz processor. I swapped processors, but then >>> neither computer worked. The original non-working one behaved the same >>> as before. The QS 2002 with the swapped processor started with no >>> chime and no video. There's nothing wrong with the 800 mhz processor >>> -- I put it back in the QS 2002 and it works fine. I'm thinking that >>> both the logic board and the processor are bad. How likely is this? >>> Any other suggestions for diagnosing the problem(s)? >>> >> Have you replaced the PRAM battery? >> > > I didn't replace it, but it checks out OK on a voltmeter. > No load voltage readings can be deceiving. Might try a new one or known good one if you have it available. > >> While working on these machines, were you properly grounded? >> > > No, but it's so humid I'm not worried about static. > > >> When you swapped the processors, did you hit the CUDA button ONCE >> (reset the power manager >> > > Yes (though I understand it's called the PMU button in G4's). > If you are talking about the button on the front next to the reset button it's not the same thing. The CUDA button is on the motherboard itself. > >> - Dan. Just a message from Doug...
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