Hi. We have a 1996 Lancing Linde E14 forklift, which a couple of times has made a short fizzing noise (less than a second) and then cuts out. The noise seems to come from the front end. Previously we have left it with the power disconnected for a while, and when we tried it again it was ok. However, it has done it again this afternoon, and although the power comes back if you leave it for a while, as soon as you touch any of the controls, it makes the abrupt fizzing noise and goes dead. I understand how vehicles with petrol engines work, but electric is new to me! I'd really appreciate any advice.