[TrevorW]

Thanks Ray

a process of eliminating all variables

it has been suggested by Theo that it could be a power supply problem

before I install the drivers again

I'll

a) test in a completely dark environment (no ambivient light whatsoever)
b) allow the camera to cool and then disconnect the power to the peltier (the camera has been back to Theo so I assume he has checked that the peltier is cooling)
c) don't know about changing the gain as this has never previously been an issue