CDC-wren fault

[Scott Quinn]

I have the Seagate version of the CDC Wren-4 (ST4376N) and I was 
wondering if anyone knew of an easy fix for the following fault:

Disk spins up (jumpered to spin up automatically) head lock clicks up, 
two "burbles" that I think mean head seeks and then the drive shuts off 
and the heads lock again. I don't see any lights flash on the front, 
but I'm not sure if it has an activity LED.