Electronic Design Flicker Fixer

I have an Electronic Design Flicker Fixer for sale. Flicker Fixer which is designed for use in the A2000 style video slot, so only supports older ECS/OCS modes. It contains a DB15 (VGA) connector and a potentiometer for fine adjustment.

I bought this for 80 euro from a seller here on Amibay last year but I never got it working 100%. The image comes through but it's distorted - I have no idea what is wrong. I ended up going with a different flicker fixer from Microway.

I'm selling it for $70 + shipping because I know it's not working 100%. Perhaps someone knows how to tune or fix.

Images are available here:
https://drive.google.com/drive/folders/1Io0PzmFw8AvbCF6Wmz0YpAbldqqwC6-d?usp=sharing

I'm not interested, but did you check it on CRT monitor? Usually this things meant to be used with CRTs only.

If you are coming to our meeting on Wednesday (I had previously typed Tuesday), then I’d be happy to take a look and see if we can get it working.