You more than likely need to keep the default processor in the DA model machine 
and do a firmware update from Sonnett to make it recognize the new cpu. Once 
that has been done, you should be able to transfer the CPU over. I recommend 
using Arctic Silver for your contact paste, but any should work fine for a 1GHz 
CPU. Once you flash the firmware of your DA to accept the new CPU, shut down, 
pull old processor, put new processor in, press cuda reset button, power on and 
see if she will boot. =)

On Aug 9, 2010, at 9:43 AM, Geke wrote:

> I took the Sonnet ST/G4 1GHz from the Gigabit I just bought and put it
> instead of my DA's 466MHz processor. Result: the DA doesn’t start up
> at all. I mean,
> HDs etc are running, but no picture on the screen.
> 
> 1. I have closely followed the instructions in a Sonnet document
> called "encore_st_g4_no_sink_qsg.pdf", so I’m wondering what I have
> missed?
> 
> 2. For the time being, I've put the DA's own 466MHz back, but I'm not
> feeling very easy about the stuff between processor and heat sink,
> though. I think it's called contact paste.
> The Sonnet document doesn't talk about that at all. Any advice on
> that?
> 
> 3. I installed Temperature Monitor to keep an eye on the CPU, but it
> gives me only the temperature of the harddisk.
> 
> To be sure: the Sonnet works normally in the Gigabit; I tested it
> before the "transplant" and after.
> 
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