Bob Watling

Hi After researching the electric bike market I purchased two eco stepper's from Tesco 14 months ago at a good price , the main reason for choosing the eco stepper was they are light enough to pickup onto a bike rack and when folded fits in the car boot. I have a motorhome and travel around Europe each year for a month or so, they have been used on the road and on forest paths with no problem, unfortunately they got left out in the rain one night and now I have a problem with the control panel on one of the bikes. The three power (low, medium, high) lights stay on but the battery indicator lights are off. I get no power to the motor. I have tried alternative battery's but I get the same problem Holding down both buttons nothing. I would seam that it is the control unit. Any suggestions how to test the control unit? Regards Bob