Hi Stephan,

What you describe sounds exactly like the 5.0V line in the PSU having drifted below the value it requires to operate normally (5.2V).

It's a 30 minute job with a test meter to open the 861 and adjust the trim pot on the PSU back up to the correct value (have done this myself previously).

It would get you back to normal functioning and allow time for some financial girding of the loins, in anticipation of the v8 upgrade which the others recommend!

Cheers

George