Pics:

Q) My scope is dead - A) Check the fuse
Q) Display is jumping - A) Clean all pots with electornic cleaner
Q) Timebase is not stable - A) Re-solder are the contacts (An i mean ALL!)
Q) Voltage/Restiance counter is gone - A) Try to change all the electorlytic capacitors on backplane, "CPU"-board, voltage/resitance-board