Kitchenaid microwave/hood , magnetrons burn out

[QFMaint]

Thanks , I got it that time.   Well , it doesn't show the detail I was looking for.  The 2 red wires that connect from the inverter board to the magnetron, I may have switched connections. Does this make a difference?  I see the mag marked F & FA , but the inverter is not marked.  The Schematic does not show the marks.
 I've been away from it for awhile and forgot to mark wires so here's what i did so far;
Replaced the mag, inverter ,capacitor & thermostat sw. above the mag.  I put a cup of water inside and turned it on 1 min. and the water was luke warm. Put back in for 2 min. , luke warm again .  Also heard no hum from mag when it was running. Thought I reversed red wires to mag so I switched them. Turned it on again and mag burned up , along with thermo sw.  I also tried switching the wires to the capacitor before I tried the mag wires, but it didn't make any difference.
 Your thoughts please . . .  thanks

[AJ]

The 2 red wires that connect from the inverter board to the magnetron, I may have switched connections. Does this make a difference?  I see the mag marked F & FA , but the inverter is not marked.

I don't do microwave repair like I use to and have never fixed one of these with a inverter.
On a standard microwave it does make a difference with the F & FA.

Back when I started doing appliance repair 1988 I mostly worked in the shop and the other tech did service calls.
Back then a lot of people would bring things in to get repaired. I remember having days were all I did was microwave repairs.

Things sure have changed in the last few years for microwave repair.

[niobrara]

Sounds like bad wave guide.

[Wedgeman55]

Fact is - you get one or two parts burnt out in a microwave, not worth repairing.    You can get a brand new one for almost the same price.     It's not the like the days in the past where you had to spend big bucks on a microwave.     Unless its a switch or something simple,  not worth it in my opinion.