Main Control board-already replaced the Magnetron

Purchased an over the counter microwave on craigslist, decent looking, doesn’t run. Symptoms are works for 2-3 seconds, then shuts off. If you put it on Power level of “0” it will run, obviously not heat, which is why I thought the magnetron. Replaced the magnetron, and that’s not the culprit, now I’m thinking control board. Any suggestions, or can anyone tell me what the part number is? Can’t seem to find it anwywere!

Thanks!

Here are your parts
Parts for Whirlpool MH3184XPQ3 Microwave - AppliancePartsPros.com

Looks like the control board is obsolete.

If you click on the below the alternate part numbers are listed.
AP4371505

See the attachment for the tech sheet perhaps that will help with your troubleshooting.
MH3184.pdf (396.6 KB)