I've been using this turntable I bought refurbished for a year now, and slowly the automatic movement of the tonearm has degraded. Can anybody please give me some advice on how to fix?

The issue is that when I start the record player, the arm doesn't move over, it simply raises and falls back down. If I gently tap it while it's raised, it moves over fine. what could be the solution to this?
Any help would be greatly appreciated

The issue is that when I start the record player, the arm doesn't move over, it simply raises and falls back down. If I gently tap it while it's raised, it moves over fine. what could be the solution to this?
Any help would be greatly appreciated