I have a DEC VT420 terminal which works pretty well. However, I am concerned that sometimes the characters on the screen seem to get torn sideways and jump around a little on a timescale of less than one second. My guess is that there is some issue with the power supply, but that is just a guess. Does anyone have any experience of this and know what I should look at in order to fix it. If it never gets worse, I can live with it, but I fear that one day it will just die. Cheers Peter Allan