Sorry Peter no such monitor here, but perhaps you could to tap (with great care) some of the video output on the 23pin video connector to obtain some sort of RGB signal to drive perhaps a component video display/tv input found on some TVs and monitors.
There is risk with everything so, please disregard if uncomfortable. There is a pinout for what appears to be the amiga 4000 23pin video connector here....
https://en.wikipedia.org/wiki/Amiga_video_connector
The link above also makes mention of an Amiga Video to SCART cable, which you could possibly try on any SCART input TV. I don't know if the following are the correct ones, but there are some here which
may suit...
https://www.ebay.com.au/sch/i.html?_...cable&_sacat=0
Good luck with the fix.
Best
JA