NE58H9970WS Broil and R/H Burners INOP

I have what I think are two separate problems with my range. The broil mode was discovered to be not working so we just lived with that problem for a few months. Recently, we discovered that the two right burners had failed. When either one is selected and a pan is on the selected burner, the blue ring illuminates around the pan briefly, and then goes out. there is a "_" with a "U" above it in the indicator for the selected burner when this occurs. I have done the following troubleshooting:

For the Broil INOP Issue:

I verified there is 120 volts at each terminal on the broil heating element when the broil mode was selected. I also disconnected the electrical terminals from the heating element and then measured the resistance value. It was 13.2 Ohms which is within the specified limits. Is it possible that the element is bad even though it measured correctly?

I did a visual inspection of all of the visible wiring in the back of the unit and looked closely components on the main control board I didn't see any burned or corroded parts. I even removed it to visually  inspect the solder joints and traces on the back of the board and everything looked ok. I took it to a local appliance repair shop here in my home town. They inspected it and felt a couple of solder joints on the BROIL Relay were questionable so the they re-soldered them. When I reinstalled the board, the same problem occurred. I can hear the BROIL relay cycling when Broil is selected. The broil element does not get hot (door is closed while waiting for it to heat - it doesn't get hot).

For the R/H Burner INOP issue:

I removed the top and the burners to access the circuit boards on the top. I inspected all of the wiring and inspected the circuit board for the right burners (looked at all of the components for burns or corrosion. Everything looked ok. I removed the circuit board and looked at the solder joints and traces on the back of the board and it looks OK.

I'm at a loss as to what to do next. I don't want to throw money at it unnecessarily but at the same time, when this thing works properly it's great so I'd like to get it working. I'm also trying to avoid laying out the money for a new range. I've contemplated replacing the main circuit board but its not inexpensive and I'm finding it difficult to locate anyone that has one available.

Please, if anyone has experience with these issues, let me know what you did about it.

Thanks in advance.