20 Most Recent Oster 0.7 Cu. Ft. Compact Microwave Questions & Answers

Fuse may be blown on the inside.

I actually typed "Oster" in Google and found their site.You can get owner's manuals from their manual page here.

No, that is the "waveguide cover".

It provides very important protection for the magnetron.

And always keep it clean according to your manual's instructions.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

If your waveguide cover is burned, it will need to be replaced.It provides critical protection for the magnetron.You didn't mention your brand or model number, but since you posted under Oster, I'll assume that's it.You can contact Oster via the information in your owner's manual or get their contact information from the dealer where you purchased the oven.