Message Pad does not replay

< - Let ME know your full model number from the tag and I can give you complete detailed instructions on how you or a friend can fix it.

"SE" means you have a shorting membrane keypad.

If and when an oven is coming on or doing anything by itself, this is very dangerous and can result in a fire.

So until it is repaired, please leave it unplugged or leave the door open when it's not in use, and of course one should never leave a microwave unattended while cooking.

The only way possible to see if the touch pads are working is to test the voltage of the control pads when it contacts. The input of the Microprocessor should be checked for the pad control impulse to come in. If there is no trigger voltage to the mP this can be the control pad problem.Some dirt can accumulate and cause the tracks to short resulting in this display. Try to use heater to warm off any moisture.
The mP must be checked for the working voltage and also the frequency oscillation at the crystal leads. If so the mP is working with a suspected control pads which are not able to set the program or timing.
There is no way but to remove the sticker pad and replace, One difficult way to have a chance is to remove the carbon sticker pads and check continuity , You can use a carbon pen to line the tracks so that the multi-meter reads a continuity. With this you can have a temporary fix

F3
Key panel (touch pad) shorted This code will occur if a shorted key panel is detected
continuously over 60 seconds. Replace key panel (also called touch
pad).

about the only thing you could do is to replace the touch pad there are no repairs done to touch pads we basically just install a new one i suppose one could take one apart and try to fix it but there are no schematics that they give to the touch pad make sure before ordering a new touch pad that it is the touch pad and not the control board that has malfunctioned if you are unable to perform these tests please call a repair technician if you have any further questions please message me back and please remember to rank how this opinion has helped in your appliance situation Thanks again
Rick

GET THE OVEN NUMBER AND SEE HOW MUCH THE TOUCH PAD COST, SOME TIMES THE TOUCH PAD COSTS AS MUCH AS MICRWAVE OVENS NOW DAYS

hello jeansween ,
can you double check that number please , R-4446 ?

http://www.sharpusa.com/products/support/options/1,2310,,00.html?model_num=r&s_func_disp_id=19&x=24&y=6

heres a list of sharp microwave owner manuals .

to cancel child lock you touch timer/clock pad, the number 1 and stop/clear pad

hope thats understandable .

If you have an "options" pad, press that and you should be able to get to the message sub-menu. If not, you may have gotten too much moisture in the key pad when you cleaned it and it will either need to be replaced or might possibly return to normal after drying out completely for a few days

Replace keypad