When trying to install 4.10 the unit does "it's thing" until it reboots and goes into "up-grading dsp's" at which point i get a field (on up-grade wizard) informing me that there is a loss of power or disconnection of cables. I have had to turn the unit off three times now with the "up-grading dsp's" being displayed on screen, although the wizard instructions say to check connections AND disconnect power. Have i knackered my unit? When i remove programming cables it shows v4.10 on screen but all the menu's are present and settings intact from previous version . I have not the courage to turn on the power-amps just in case. Why is this happening? regards Steven.