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Replacement parts for JENN-AIR JDS9860AAP Range - S/c S/i Gas & Elec Duel Fuel | AppliancePartsPros.com
Here is the tech sheet and manual
It could be the control board but may be a bad/dirty connection.
Could be a pain to find and confirm it.
If you can get it when it is alive try to read the fault codes, see the tech sheet.
Do not do too many things at once which is a pain because it slows the process down. The problem with doing too much is if the unit comes up and runs then unless you find/repair an actual fault you will have no idea where to look for it and odds are high that it will fail again, usually when you have a family dinner planned.
Be sure to do this with the unit unplugged. It is very easy to forget this when you are trying something plugging it back in, unplugging it trying something etc.
Since the unit goes totally dead check the wall receptacle also the terminal strip in the unit. Would not hurt to also check the circuit breaker.
Disconnect/reconnect the plugs at and going to the control panel.
Check that all the pins are properly crimped and have not backed out of the receptacles. Check that they are not discolored (dirty) usually a gray or tan color coating.
Check the back of the control board for a cold solder joint to a pin or a component. Best to have a magnifying glass for this. Cold joints will often be a duller silver/gray color or will have holes. Try wiggling the pins and components from the front side while watching it's solder connection on the back side, if the leg moves then it is a bad solder joint. Check the circuit trails on the board you may see a crack across one of them.
Try the following.
Connector Cleaning / Checking
Unplug the unit
Open it up
Remove the ribbon cable from the keypad to the control board at the control board.
Clean the edge connector.
If it is the type where there is not a connector just the insulation is removed, it can be cleaned with a pencil eraser. Do not use an ink eraser as it is too abrasive.
Check the tracks in the ribbon cable for hairline cracks. A magnifying glass helps here.
Would not hurt to clean the connector on the board. Use electronics contact cleaner or isopropyl alcohol and a tooth brush. Be gentle and do not reconnect till all the solvent evaporates.
Reconnect everything and give it a try.