[Test-Equipment] a 'dumb' scope question.

[Ron Bussiere via Test-Equipment]

Hello, been posting and learning a lot on these great groups.

I have a problem with 2 scopes.

First, I want to clarify I have a rather large scope collection (24) and a ton of test equipment. Going through my scope collection (cleaning / testing) this weekend, I have 2 that malfunction. They are both Kenwoods and have the same problem....
One is a model CS-2110 (100 MHz) and the other is a CS-2150 (150 MHz) I have a Manual, but to be 100% honest, I haven't broken out a microscope and gone through it, yet! ha ha

They power up but I cannot find the trace on either. "beam finder' tries to work. In the background of the CRT, you can 'see' some stray illumination flashing when you vary the timebase. Using the internal cal also has no effect. It's like the trace is off the screen and no fiddling with any channel / position knob will bring the trace onto the CRT.

I suspect the HVPS, and looked to see how difficult it would be to get to the caps. I think it would be a better move to pitch the scopes into the trash.
The entire scope appears to be built around the HVPS.........WTH???

It's just strange that 2 Kenwoods would have the same problem......

Any ideas?????

ron
N4UE