I recently cleared a paper jam from this HP laserjet 2100tn and the printer is not working. I turn the printer and the machine does not even try to power up. The lights flash and then the attention light blinks. I have taken the machine apart and there is no paper jam in the machine. I have tried swapping out toner cartridges. This has not helped. It seems like the mechanical part of the machine doesn't even power up when the machine is turned on. (i.e the rollers don't rotate, etc when machine is turned on.) What should I do next?