It can be a expensive repair, but if it is the main board (which it sounds like) then you could do it yourself rather easily,
First off unplug the unit.
Take the top cover off by removing the four screws holding it in place(maybe as many as six screws) you will see a white box in the back of the machine.
take the cover off of that box, but using a screwdriver to pop the tabs up allowing you to get the PWB cover off.
With power at the outlet plug the machine in. You should see a red LED on the control board, if this light is off, then check your voltage at the noise filter (the part that the power cord runs to, it's to your right when looking in the machine). If you have 110Vac (+/-6%) at the noise filter, and the red LED is not on, then your PWB board is bad. I have this issue with a customer right now. I am charging $300 for the repair, the board's MSRP is $175, you can find it on the parts store linked to this site for $135.
Very very easy swap. The plugs can only go one way. If though, the filter was not getting voltage on the other side, you can replace that, and that part is only $45 I think.
I'll include the troubleshooting flow chart, please mind my scribbling on it, lol.
It is very easy to diagnose, and even if you felt like you couldn't do the swap, I would at least want to know what the fault was before I called a technician.
Also this site has access to the manuals.