[G4] Power Supply Problem

[James Pacyga]

What OS are you running?   I upgraded (and sorry, but I am not sure 
which version at this point as it was months ago, 10.3.4?) and it 
caused my optical drive to go nuts.  I thought I would have to buy a 
new controller - but once I upgraded again to the next revision, the 
optical drive came back with no issues.


On Feb 12, 2005, at 9:10 AM, Joel Threatt wrote:

>
> On Feb 6, 2005, at 10:17 AM, Joel Threatt wrote:
>
>> I have a Quick Silver '02  dual 1gig, currently at 867 due to a dead 
>> processor. I recently had some issues with the drives not spinning 
>> up. My constant on/off/pram resets pretty much finished the logic 
>> board as well. First I sent the PS to a Mac repairer for the "free" 
>> diagnoses. I was told the PS was fine so then I sent in the logic 
>> board and after calling them they said the board was dead and it 
>> couldn't be repaired. OK so of course they could replace the board so 
>> I did that. A few days later I reassembled my QS and it booted and 
>> ran fine, much to my relief. After about 5-6 hrs the drives again 
>> spun down. Being careful only to do ONE pram reset I proceeded to 
>> change cables, change drives, try one at a time. nothing worked. All 
>> those drives spun up fine in my one firewire enclosure. A check of 
>> the voltages at the plugs showed 4.75v and 9.6v respectively. I tried 
>> this with drives connected and disconnected. Curiously enough my 
>> internal CDRW runs fine while my hard drives will not spin at all 
>> when connected to the PS. Although they work fine in the Firewire. I 
>> own a lot of Macs starting with a Color Classic II and had no 
>> problems like this occur. This is my first G4 and all this trouble is 
>> driving me back towards a PC.   Oh I also checked the battery and it 
>> was at 1.2v so it got replaced first thing. Has this happened to 
>> anyone else? I figure I am looking at a new PS. Or could the new 
>> board have failed like the original? Your thoughts will be greatly 
>> appreciated
>>
>> Joel
>>
> The computer works well with the firewire drive but now it has started 
> to not read CD's. CDRs, commercial disks, nuttin. Another question I 
> have is, would using a third party IDE Controller in place of the 
> built in controller function.  This problem seems to be centered 
> around the on board IDE controller.   Any thoughts.
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