Vintage retailer Magnavox Matrix 8Track for Parts

Product Name: Vintage retailer Magnavox Matrix 8Track for Parts
Magnavox Matric 8 Track AM/FM Stereo Receiver Model No KF0800 retailer WAF1 Serial 012835393 Amps .55 Run N-2 120 V 60 Hz 21" x 14" x 4" Being sold AS IS for PARTS/REPAIR. Cosmetically good condition. No deep scratches/visible cracks. Minor scuffing. Signs of aging. On/Off toggle perfect & functioning. Select button perfect & functioning, properly lighting up program selector for 8 track. Headphone jack untested. Loudness toggle perfect & functioning & properly controls loudness of speakers. R/L volume switches in perfect functioning condition & properly control balance of speakers. Treble/Bass switches in good functioning condition, but a little tight on the slider. Aux/AM/ST FM/FM/TARE/PHONO knob i perfect functioning condition, properly lighting up selection on board. Tuning knob perfect functioning condition, properly moving needle on dial. 8 Track player itself does not seem to be functioning properly. Unsure of what needs to be done to fix.