Zenith HiFi VCR Model VR4257HF Issues

[vortalexfan]

Hello everyone, I had picked up from the local electronics recycler/Computer repair shop a 1997 Zenith HiFi VCR Model VR4257HF that when I power it on it attempts to go through the "bootup" process and it gets stuck part of the way through and then shuts off and pops up a "ERR" message on the front panel display.

I actually did have it working for a little while which I had repaired it by replacing the drive belt underneath the mechanism but then it started acting up again and so I tried replacing the belt again (it wasn't a brand new belt I put in the first time it was one I had salvaged off of an older Panasonic VCR from the 1990s that bit the dust but the belts were still good on it), and unfortunately that didn't fix it this time.

I was thinking maybe dirty mode switch contacts but I'm not sure if that would cause this issue or not.

Any ideas as to what could be causing this VCR's issues its having?

Thanks for your help.