Hi all, long time no post!
In summer I got a cabinet which has an Electrohome G07. The monitor was working (although very hissy), but not the game so I couldn't test it fully. I cleaned up the monitor as best as I could, and replaced some parts as a precaution:
Cap kit
Flyback
HOT
Voltage regulator
R908
Adjustment pots (bar B+)
Checked the AC in voltage from the isolation transformer, set the B+ voltage, made the necessary colour / geometry / convergence tweaks.
I have only been running Galaxian on the monitor, and it has been working great (although still quite noisy). However I noticed recently with the game disconnected and the blank grey screen showing, there are some odd things going on - a line down the screen, some flickering (dulling), and 'black' occasionally briefly appearing. Most of these things were not visible with Galaxian running, perhaps as most of the screen is black. These symptoms have got worse to the point that rather than being generally ok, it is now never ok. It's doing all sorts of things, probably best summed up by this video:
https://twitter.com/minsoftgames/status/1084945976434089986As you can see the grey/white that should cover the whole screen is either not present at all, or only partially there at times. It seems like perhaps something is failing?
Has anyone seen this before, or got an idea what I should check?