Quoted from Mancave:

Possibly the pot is on the way out, they do go dodgy over time. You could try reflowing the solder on the 3 pot legs. Could be a different issue with the chassis board but that would be my first thought. The pots are readily available if you need to change one over, just remember to get the correct ohm rating.

Quoted from Mancave:

That does sound suspiciously like a possible broken leg on the pot yeah, might be broken through but the two sides still kind of touching each other. Resistors like any component can go bad over time but i'm thinking the pot is the main culprit. I think adding the video amp isn't too hard to do, didn't have one on my machine when i owned it though so others in the club will be able to provide more precise info. I've said it many times in the club...KEEP the CRT if at all possible

Quoted from j_m_:

could be a bad potentiometer altogether. cleaning up a cold solder joint by reflowing won't necessarily correct the issue

Quoted from Mancave:

You should only need to replace that particular pot, but make sure the ohm value is the same as the original. I had a similar issue with a remote board like this on a Leyland Super OffRoad machine, started off with the picture not holding and on closer inspection i realised the pot was cracked through one side above the leg. Once i changed the pot to a new one it was good as gold. I'm not sure what the Ohm value is on that particular pot, they do vary across the board, not always the same ohm rating. Usually the value is printed on the pot somewhere, sometimes on the edges of the body, sometimes on the adjustment side.

Quoted from Zitt:

More likely 5 plus 2 zeros... IE 500 ohms.
Look at the schematics to confirm.
To test a pot for opens; you should see ?500 ohms? across the two outside pins. (DVM in resistance mode)
The wiper would measure a percent of that value.
Wipers go bad regularly on these cheap pots. Heat could make it worse.
Also it looks like you ?may? have soldered on the top part of the pot instead of the pin side (bottom of board); if you did - it's possible you may have contaminated the wiper ring on the top side of the pot with solder flux.

Quoted from Mancave:

Even touching the adjustment part of the pot if it's going/gone bad would create effects on the screen (lines, etc) I'm not sure if those numbers in your pic 52, 25 are the values and i don't have my machine any more to confirm for you. Do you know what type of monitor and board you have in the machine? usually they are either Wells Gardner or Ducksan. From your earlier pic showing most of the remote board it looks like it may be a Ducksan. There will be others in the club who can confirm what value pot you will need. The 52 "could" stand for 520K but i can't be positive on that.

Quoted from Mancave:

Try messaging applejuice i know he has some chassis boards for sale and may be able to help you out with a spare or even a changeover maybe?
I would replace the pot for you but it wouldn't be worth the cost of posting to me and back again, the pots themselves are worth bugger all. The other thing is i wouldn't be able to confirm the pot changeover is the main culprit as i don't have the machine any more to test it in. I'm still fairly confident that is the problem though. Hopefully someone your side of the pond can help you out.

Quoted from Mancave:

No worries at all i just hope you can get it sorted. Until someone tells me that i'm totally wrong (and that's quite possible ) i'm still of the opinion that any tri leg pot that has the same value as the suspected bad one (and pretty sure the Vertical hold is 200k) will be fine to replace. I don't think you need to have a pot that is from the same/original manufacturer, the ohm value is the most important factor and the watt rating will be consistent i think. I didn't need to source an "original" pot for my Super Offroad remote board, just matched the ohm rating as previously mentioned and that worked fine!

Quoted from applejuice:

A question to RFM owners. Any more 'party mode' flipper options that people would like to see?

Quoted from WhiskeyTango:

I have some PUB cards left.

Quoted from Don44:

I have this 19 K7302 wells Gardner monitor, I was told it was recapped and works but The glass part in the 4th picture is broken. I got it with my RFM when I purchased it but I do not need the monitor. What is the piece that is broken and can anybody give me a value on this?
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Quoted from Don44:

You can have it, just pay shipping. Just let me know what part you want.

Quoted from Don44:

You can have it, just pay shipping. Just let me know what part you want.

Quoted from msj2222:

Thanks, Thats great! I will give you something for it. I will pm you with details.
.

Quoted from Don44:

Thanks for making me look bad but I had offered to shirkle first in a pm and it took him a couple of days to get back to me.