[X4U] DRAM failure (was Hard drive or hard drive controller gone)

[Jon Wever]

The later G4s need all hard disks to be jumpered for cable select.  
They shipped with a single drive set to CS so, yes, I think you can  
leave it that way without contributing to the problem.
Cheers,
Jon


On 19/01/2006, at 1:35 PM, Jim Robertson wrote:

> On 1/18/06 2:22 PM, "Linda" <XPressoBean at mac.com> wrote:
>
>> Are the jumpers on the new drive correct? Master, Slave, or  
>> CableSelect?
>
> Originally, there were two drives in the box (it can hold 4, in 2  
> separate
> bays). I had them in the same cage, both jumpered cable select. One  
> drive
> showing signs of failure was what started this debacle. I've  
> installed the
> new drive by itself, jumpered cable select, and it's on the end of the
> cable. Since the machine worked for more than two years with the  
> drives set
> that way, seems unlikely that cabling is the problem. However, now  
> there's
> only one drive. I guess I could change the jumpers to "Master", but  
> it's
> hard to believe that would make any difference (I'm assuming my  
> hard drive
> isn't the problem because the Mac runs for 10-30 minutes before it  
> freezes,
> passes the Disk Utility interrogation, and allows the entire OS X  
> Tiger
> installation from the DVD followed by all the software updates.  
> Indeed, one
> of the striking things here is that the Mac freezes when it's NOT  
> really
> doing anything but resting.
>
> I was wrong about one other detail in my earlier posts. I had  
> thought that
> one of the DRAM sockets was bad, because with only on module in the  
> box, in
> that socket, the Mac had emitted the monotone alarm on power-up.  
> However,
> I've put a DRAM module in that socket again, and the Mac will boot.
>
> Jim Robertson
> -- 
>
>
>
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