plenty,but i would not advise you to touch the unit unless like me you are a trained engineer,there are very high voltages inside,even when it is turned off,the capacitor stores up to 10.000 volts depending on the micro wave,
it has a bleed resister in it but that is not to be trusted
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix microwaves.