Mine is a Chroms Polaris II. The EPROMs day rev 5. Are they the same EPROMs as in a Chroma Polaris (v1)?

If so I’m happy to buy an eprom burner and update to the newer versions at the site. If there is an affordable burner anyone here could recommend for this task I’m game to have one at my workbench given the amount of vintage gear I have.

Anyhow checking the cables and EPROMs are good starting points that I can tackle before having to bring it to a shop.