Sony SLV-575UC VCR not loading tapes properly

[Captainclock]

Hello Everyone about a year ago I purchased at the Goodwill I'm currently working at (I didn't work there when I bought the unit) a Sony Prosumer Grade VHS Player Model SLV-575UC that was working perfectly when I last used it a month ago, but now all the sudden when I went to try and use it tonight to watch some newly acquired NOS Red Skelton Tapes that were still sealed in the original packaging but for some reason the tapes wouldn't play and the Real Time Counter wasn't working and so I took the VCR apart thinking maybe it was a bad belt and sure enough it uses the same toothed belt as the old Sony Betamax VCRs do, and the belt was in excellent condition yet so I buttoned the bottom of the case back up and took it apart and checked the top side with the tape loaded and sure enough only half of the loading mechanism is working, the right side take-up arm works but not the left side one, and the captsan roller arm doesn't engage the tape properly with the capstan pincher/counter wheel assembly. So does anyone on here have any ideas as to why a Sony Prosumer Grade VCR would all of the sudden stop working correctly after only a month of sitting unused? Any help would be appreciated.

Thanks,

Levi