Wanted: Hameg HM1507-3 Oscilloscope Service Manual

[mlinuxk]

I have a Sencore SC301 oscilloscope and component analyzer that was stored in a dry unheated out building for 16 years. It was never used.
I opened it and everything looked good, I powered it up and it came on. Good trace, tested the inputs, looked brand new.
I let it burn in for a couple of days ,yesterday it was fine, but saw a little jumping in the OSD.
Autostart seems to proceed normal.Today, no HV? No display!
It was made by Hameg seems to be similar to HM-1505 or HM-1507 but I can't find a service manual on line.

Anybody know where I can find one?