Qualcast Power-trak 34 Spares Or Repair

Qualcast power trak 34 electric lawnmower listed as spares or repair. I was cutting my lawn last week when all of sudden the blade stop rotating. I ve had a quick look myself but haven t got a clue about lawnmowers. It could be something simple or something big I just don t know. The mower still runs just not rotating the blades. Cash on collection preferred Pick up only.