Rowers

If you have a magnetic rower then it sounds like you need a new clutch. If it's a Fan rower you need new one-way bearings.

If you have a chain drive, this needs to be lubricated every 1-2 months.

Yes! you will need to change the batteries or you could have a loose conection where it joins to the sensor cable .

No! Ball bearings have greased casings and when you spray CRC into them it cleans out all the grease and that can get all over the rower. New bearings are needed.

First of all check that your sensor wire that usually sits under the seat rail has not been cut, if that's ok check if you still have a magnet attached under the seat, as you row the seat travels over a sensor under the rail making it "click" telling the screen what's happening. If any of these are missing your screen won't work, or it could be the screen it's self. Some rower's also have a sensor inside as well.