[G4] Power Supply Problem

[Joel Threatt]

10.3.8  started at 10.3.5, also have ran 9.1 and 9.2.2. Its not so much 
the optical drive as it seems to be effecting all drives, more so the 
hard drives at first, now any drive directly connected to the logic 
board IDE ports.

Joel
On Feb 12, 2005, at 12:15 PM, James Pacyga wrote:

> 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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