How do I use power feature? - Sanyo Microwave Ovens

L is for locked.

https://www.samsung.com/in/support/home-appliances/using-the-child-lock-features-in-samsung-microwave-oven/

I am not sure this is your issue ... but from the Whirlpool web site .. to turn demo mode off: Possible Solutions

The control has been placed in demonstration mode

IMPORTANT: This feature is intended for use on the sales floor with 120 V power connection and permits the control features to be demonstrated without the oven turning on. If this feature is activated, the oven will not work.
1. Press SETTINGS/CLOCK until "DEMO MODE" is displayed.
2. The current setting will be displayed.
3. Press the "1" keypad to adjust the setting.
4. Press START or CANCEL to exit and display the time of day.

Reset power to the product:

There may be a problem with the User Interface/Keypad, or the associated wiring.

• Power unit down by turning off the circuit breaker(s) for one (1) minute.
• Power unit up by turning on the circuit breaker(s).
• Monitor the oven for one (1) minute to ensure the error code does not display again.
• Verify oven operation.

most models don't have that feature any more, If yours has a setup feature when you first power it up you may be able to adjust the contrast level up

consult the owner manual but unless it has a feature this is not normal.

This feature detects when your child pushes various buttons.
To reset/remove this message, disconnect the microwave from the mains power, wait for 30 secs and connect it to the mains power then set the Time and your microwave is ready for use.

This is a safety feature of the microwave. Unplug it and leave the door open for about 10 minutes and it should work again with no problems.
P.S. My kids overheat mine all the time making pop corn.

1 Use the number buttons to set a cooking
time. You can set a time from one second to
99 minutes, 99 seconds. To set a time over
one minute, enter the seconds too. For
example, to set 20 minutes, enter 2, 0, 0, 0 .
2 If you want to set the power level to
something other than High, press the Power
Level button, then use the number buttons
to enter a power level.
Power Levels:
Level Cooking PL
1Warm10
2Low20
3 Defrost 30
4Medium Low40
5Medium50
6 Simmer 60
7 Medium High 70
8 Reheat 80
9 Saute 90
10 High Hi

Hope that helps.

If the microwave functions normally while cooking everything else, but is only burning popcorn, there is no component problem that will cause this. You cannot adjust or replace any internal component to make it not burn popcorn. All power levels and program options are contolled by the consumer at the control panel. Refer to your owner;s manual for their recommendations.

If the oven is equipped with a popcorn feature button, it is programmed for a recommended power level and time. This is an ESTIMATED program feature. The manufacturers of both the oven and the popcorn will also give directions that tell you to turn the oven off when the popping slows to about a pop every 2 seconds. Failure to do so can result in burning.

If the microwave does not come with a popcorn feature button, the manufacturers of the popcorn have directions on the outside of the box that tell you what POWER LEVEL and TIME to set the oven on for the desired result. Again, the you still have to listen as the bag pops to ensure it does not burn.

In addition, on some microwave ovens, there is a feature that allows you to select the SIZE of the popcorn bag. Some popcorn manufacturers have smaller snack size bags that don't take as long to pop. You have to select the appropriate size to get the correct program option.

In any case, you never are to place popcorn in a microwave oven and walk away from it. All these program features are ESTIMATIONS based on manufacturers testing and recommendations for the best results. All microwave ovens are different and operate at different power levels. Your best judge is to listen as it pops.

I hope this helps you.

I can explain that. You enter the power level you want from 0 to high(10) the number corresponds to a percentage of time the cook cycle is ON. 5 being 50%, for each minute of cook time programmed the magnatron will be on 30 seconds and off 30 seconds. You can program anything from 10% to 90% in place of the high or "always on" setting. Eric

REMOVE THE CABINET AND IT SHOULD BE CLOSE TO THE POWER INLET ON THE MOTHERBOARD IT LOOKS LIKE THE OLD GLASS TYE FUSE BUT MADE OF CERAMIC. GO TO www.repairclinic.com ENTER MODEL NUMBER, SCROLL ALL THE WAY DOWN N CLICK THE RED 100. FROM THERE LOOK FOR PART 634759 1055598 634750 1055589 1469078 ONE OR MORE OF THESE COULD BE THE CULPRIT START WITH THE LINE FUSE.