The display is OK
The keyboard is working, the time rolls down when I press start, it stop when I press stop or when I open the door.
I heard a little click when i press start or stop.
Nothing else is working, no heating, no light or turning or fan noise.
The fuse seems ok, there is no display when I take out the fuse.
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Re: only the keyboard is working
Quite often this is due to a bad door switch.
Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure.
I have a text file called "doorsw.txt" which helps in diagnosing and repairing door switch problems. You can find the file via a Google search.
In some cases, the problem is a bad connection or a bad relay on the control board. That's something we see from time to time, but it's usually a door switch.
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Here is a section of the manual for your microwave on child lock, hope this helps. "L" - Page 7
Press and hold STOP/CLEAR until " L " appears on the display and a BEEP sound is heard. The CHILD LOCK is now set. The time will disappear on the display . To cancel CHILD LOCK press and hold STOP/CLEAR until " L " disappears. You will hear a BEEP when it's released. If any button is pressed, "L" will appear on the display Your oven has a safety feature that prevents accidental running of the oven. Once the child lock is set, you will be unable to use any functions and no cooking can take place. However your child can still open the oven door. Press STOP/CLEAR. Child Lock 7
The sensor errors are probably just from opening the door and interrupting the sensor cook cycle.
By the way, you should always press "Stop" before opening the door of a running microwave. Otherwise, the door switches will prematurely fail.
I would first check the door switches and their mounts. See this help file.
You can usually find
helpful exploded view diagrams and order parts by entering your full
model number here.
should be a "mini-manual" (tech sheet) hidden inside the unit
control panel or hidden on the left side behind the grille, which is
very helpful when troubleshooting, testing, and locating
You can also download manuals, installations info, and parts lists here.
We'rehappy to help you with free advice and we'd appreciate your
thoughtful rating of our answer.
TOUCH PANEL & MICROCOMPUTER BOARD TEST FOR WHIRLPOOL....
The microwave oven may be provided with a self diagnostic routine that can be operated
through the touch pad keyboard. To enter the self-diagnostic routine:
1.While pressing the CANCEL keypad: a) Open the oven door. b) Unplug the microwave oven for 2-seconds and plug it back in. c) Release the CANCEL keypad and close the oven door. You will see the following display.
CHART NOTE: The humidity sensor test results will appear on the display after 8-seconds.If the tests are successful, "OK " will be displayed. If one or more of the tests fail, "ERR " will be displayed.. 2.When a keypad is pressed, a number according to the test chart will be displayed. When no keypad is pressed, a blank "O" (square) is displayed...
POWER FAILURE & FAILURE CODES Power Failure: After a power failure, the WELCOME screen will be displayed.
F2 Keyboard Failure: Refer to the Tech Sheet and conduct a touch panel continuity test.
F3 Humidity Sensor Failure: Refer to the Tech Sheet and test the sensor.
F6 Microwave Relay Failure: Check the microwave relay.
F7 Microcomputer Board Failure: Change the microcomputer board.
The main fuse has blown in the microwave, you also have secondary problem that sounds like the magnetron has failed, but there are two other parts to consider, the high voltage capacitor and diode work in conjunction with the magnetron to heat the food. The repairs could run as high as a new microwave oven.