Why did my rival microwave model # RGC7702 stop working suddenly?

If nothing works it might be a fuse. Unless you know what you’re doing do not take it apart yourself. If you do not get it back together right it can be dangerous.

This could be a lot of things. IT might be a capacitor or diode. MY money is on the capacitor. Since it works for a minute before it quits.

My Panasonic Inverter S333 just suddenly stopped working April 30 after I used it for only two years, no showing in panel. It will run only when I open the door, it is strange.

sounds like the magnatron went out

I had this problem too:
it turns out that it (apparently) just needed some 'warm-up' time!

After being plugged in for about 15 to 30 minutes,
the buttons suddenly "came to life"...

Note that when it's flashing 88:88 you are supposed to _start_ with the 'Stop/Clear' button. After that, set the clock (press "Clock", enter the time with the number pad, then press Clock again).

Hope that helps.

Hi, you must check the inside fuse. If is burned out, please consider that something happened, you must check further beyond to find the causes.

could have blown a fuse inside the unit or mine sometimes trips the breaker

Do the inside light and turntable come on when you try to cook?

Is it making any unusual noise or is it louder or quieter than normal?

Do you have the model number?

The Keypad is a Circuit.Each of the Function Buttons is a switch. The same "Touch" Techinology as is used of your TV Remote Control Pad or your Telephone. It would appear that your Keypad Circuit is Open, not allowing touch commands to reach the Control Board.The Keypad will have to be replaced. Best done by a Professional. I have seen "Rare" cases of a defective Door Switch causing such symptoms.