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

[System Admin]

Jim:

Definitely try unplugging the machine from power, leave it unplugged for a
while (overnight), and then plug it back in and try again.

As stupid as this sounds, some people who, after installing 10.4.4, had
their fans revving at top speed all the time found that this solution worked
when resetting PRAM, OF, etc. did not.

One other item you might want to try is getting some high quality contact
cleaner for your RAM connections. I've heard through others that this solved
problems that were otherwise unsolvable.

Good luck! We're all pulling for you (and the Mac).

... Eric


On 1/18/06 9:35 PM, "Jim Robertson" <jamesrob at sonic.net> 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


Eric Morrison
Insigniam Performance
Catalyzing Breakthough Results
www.insigniam.com
1.610.667.7822

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