how can I fix a toshiba DVD/R-VCR Combi model DVR202KB?

These machines convert analogue to digital integrally, so they are very expensive, even second hand. We do have other VHS recorder's and players, but need a top box with them. Thanks for the answer

Val
February 2020

I'd advise you to write the machine off as specialist repairs would be far more expensive than its worth and I doubt the parts would be available now.
You should consider buying a new DVD player which are dirt cheap these days and source a second hand VCR player from ebay if you still want to watch VHS tapes.
You may also be able to find a second hand version of your machine, in working order, if you are especially fond of that one!

Rupert
February 2020