dont know if this is what the problem is with yours.. i had one on the bench yesterday.
thurned out to be a faulty line output transformer, the A2 control had gone faulty, try turning the a2 up slightly (follow the big red wire from the top of the tube to the to the top of the transformer, look on the side there will be two holes one marked focus one marked screen.. screen is the one you want) try adjusting it by about 1/8th of a turn either way if the screen flickers thats your problem, you may find that just turning it up a bit will will cure the problem for a while, but the lopt for these is only 30 euros
jay
June 2007