Hi,

#1. Noisy fan with bent blade:

You need to replace the fan. I very much doubt if it could be repaired, and even then, I wouldn't trust it. It sounds as if the bushes/bearings are shot and the blade has been hitting the housing.

#2. Won't start:

1. The lights don't normally come on unless the machine is turned on, and they don't come on now.
2. The machine won't start on battery power.
3. The machine will not start on mains power.

That sounds very much like a broken on/off (I/O) switch to me. When they fail it tends to be sudden and catastrophic.