Chris,
I agree with Toby! Also there are condensers elsewhere that can cause problems. The two 4,7mfd on the high voltage board are likely bad. I replaced mine with 6,8mfd Nichicon ULD types. The additional capacitance reduces the ripple and gives a stiffer supply. Using this type is advised because these need to be a high frequency type. Other series will also work. If the 130V supply is low, that will cause high voltage problems. The originals in mine had high ESR.
Bad connections could cause your problems. Clean and reseat items in sockets including the coax cables.
Mark
