What to do if the buttons on the microwave don’t work?
No household appliance has generated as much controversy about safety and usefulness as the microwave oven. There are still walking myths about harmful food from the microwave, the negative impact of radiation on humans, even about the radioactivity of the device. However, all this is nothing more than a fiction. Back in 2008, the World Health Organization officially confirmed the safety of microwave waves for humans.
Most users can’t imagine life without such equipment, because it’s convenient, practical and fast. That’s why when problems occur, they try to fix it as quickly as possible. Let’s look at the reasons why the touch buttons on the microwave do not press, and how to fix them.
Recommendations for using the touch keypad
The best way to avoid microwave keypad breakage is to install it away from the fumes that accompany cooking on a gas (electric) stove. It will also help to extend the life of the sensor by following these rules for using the microwave oven:
Microwave Oven Troubleshooting in MINUTES ~ STEP BY STEP
- careful pressing of the keys (buttons);
- Regularly cleaning the front of the microwave oven, while avoiding pouring cleaning liquids on the touch panel.
Note! It is recommended not to plug the microwave oven into the mains without a voltage regulator. This will avoid power surges that contribute to damage to the conductive elements of the touch keyboard.
Is the keyboard really broken??
Your microwave does not respond when you press the buttons? Are you sure that the problem lies there?? There are repeated situations where replacing the microwave keyboard does not change the situation, and the device still does not perform the necessary actions.
The thing is that both the electronic panel itself and the microcontroller are responsible for the efficiency of the device’s response to the display keys. Agree, even if the panel will perfectly produce a signal, without quality processing, the microwave will not be able to start.
In order to prevent situations of aimless replacement of the touch keypad, we recommend that you proceed as follows. As soon as the display malfunctions, disassemble the device to get to the board. Next you need to use a multimeter to check the entire microcontroller for defective components. If even one area isn’t responding, you’ll have to replace the entire board. If you don’t find any problems with the board, you can safely order a new touchpad and install it in place of the old one.
Are you sure the keypad is broken??
Your microwave oven does not respond when you press the buttons? Are you sure that the problem lies there?? Time after time there are repeated situations in which replacing the microwave keyboard does not change the situation, and the device still does not perform the necessary actions.
The whole point is that both the electronic panel itself and the microcontroller are responsible for the efficiency of the device’s response to display keystrokes. Agree, even if the panel will perfectly produce a signal, without quality processing, the microwave will not be able to start working.
In order to prevent a haphazard replacement of the touch keypad we recommend the following steps. As soon as the display malfunctions, disassemble the unit to get to the board. Next, you need to use a multimeter to check the entire microcontroller for failed components. If any one area fails to respond, the entire board must be replaced. If there are no problems with the board, you can safely order a new touch panel and install it in place of the old one.
Tips for Using the Touch Keypad
The best way to avoid microwave keypad breakage when using the microwave is to place it away from the fumes that accompany the cooking process on a gas (electric) stove. Also help extend the life of the sensor by following these rules for using the microwave oven:
- Carefully pressing the keys (buttons);
- Clean the front of the microwave regularly, avoiding flooding the touch panel with cleaning liquids.
Mareux. The Perfect Girl (Retrowave/Synthwave cover)
Note! It is recommended not to connect the microwave oven to the power supply without a voltage regulator. This will prevent voltage spikes that could damage the conductive parts of the touchscreen keypad.
How to convert the touchpad to a button panel
It happens that the keypad of the oven can not be repaired, and the original part for replacement is not available. The easiest solution is to convert the touch panel of the microwave oven to a button panel. To do this:
- The device is disassembled, the touch panel is removed and is stratified.
- Redraw the circuitry from the panel film.
- Forming a circuit to assemble a keypad on regular buttons.
- Drill holes for the buttons, using part of the native keyboard as a template.
- Mount the buttons in the plastic, checking the smoothness and evenness of their movement.
- Solder according to the pre-drawn diagram.
- Assemble the device. It is better to put a double-sided adhesive tape on the front side of the original panel, like a picture with painted buttons.
After repairing the equipment is plugged in and tested for functioning.
Often the microwave oven is used only for heating food, so when repairing the keyboard leave only 2 buttons. “Start” and “Stop”. How to turn on the touch microwave with one button? The steps are the same as for replacing the touch keypad with a button keypad. Only when a new diagram is formed, all the buttons are removed from it, leaving only “Start” and “Stop”.
Recommendations for using the touch keyboard
The best way to avoid microwave touch keypad breakage is to place it away from the fumes that accompany cooking on a gas (electric) stove. It will also help to extend the life of the sensor by following these rules for using the microwave oven:
- neatly pressing the keys (buttons);
- Regular cleaning of the front of the microwave oven, avoiding the flooding of the touch panel with cleaning liquids.
Note! It is recommended not to connect the microwave oven to the electric mains without a voltage regulator. This will avoid voltage spikes that can damage the conductive elements of the touch keypad.
Causes of breakage
In most cases, the cause of microwave oven damage is the failure to follow the rules of operation. The first rule to remember is not to let metal objects fall into the chamber. Even a metallized rim on a plate. painted with m-metal paint. can be the cause of a rapid sparking in the microwave. A spark often “pierces” the magnetron, which then fails. In addition, it is when the microwave oven sparks, the protective plate is damaged, the power circuit elements can fail.
The second common cause is the use of cookware not designed for microwave ovens. If you heat food in a closed container, it can burst. In this case, the contents fly in all directions, clog the waveguide, the microwave oven does not work again. Turning it on again will burn out the magnetron.
Using cookware not designed for microwave ovens can cause damage
The last unacceptable mode is no load. If you turn on the microwave with an empty chamber, its failure is almost guaranteed. And in this case, too, the magnetron would burn out.
There are not many technical causes of microwave oven failure. Firstly, there are power fluctuations. This problem can be eliminated by installing a voltage regulator. Secondly, it is a physical deterioration of parts. This is true for equipment that has been in operation for more than 7 years. Third, the use of low-quality parts. This is the trouble with cheap machinery. And fourth, a manufacturing defect. Again, the brands that have been on the market for many years have better quality control than the unknown ones. The good news is that manufacturing defects usually “come out” during the warranty period.
Example of step by step repair of LG MB-4022G microwave oven
The causes of breakdowns and malfunctions of the microwave oven, as you have already seen above, can be very many. Most often it is a failure of the magnetron itself, due to improper use of the device, namely the use of dishes not intended for cooking in the microwave oven. Also different metal parts that can accidentally be inside during operation.
Failure of the magnetron can be considered the most unpleasant reason, since the replacement of this part is not worth the deduction. In that case, it’s easier to buy a new oven.
But sometimes there are minor breakages, which can be easily eliminated without special tools and without spending a lot of money.
Below, in the article will be described one of such failures, and how to fix it. On the photo furnace that does not turn on and does not respond to manipulation of knobs.
Before removing the protective cover from the oven, the power cord and plug itself should be carefully inspected for cracks and cuts. If we have them, then we need to dismantle the oven.
To do this you will need a Phillips screwdriver.
Turn the furnace back side up and after unscrewing the two fixing screws remove the ventilation cover. Next, remove the protective cover.
There are several screws on the back that secure it. Unscrew them all.
When all the rear screws are unscrewed, go to the side, left side.
There are three screws, two at the bottom and one in the middle. They should also be unscrewed. As you unscrew the screws, you can observe how the metal edges of the cover come away from the case chassis.
Next, we lift the lid up a little and pull it towards us. Thus, it comes out of the grooves located on the front of the body.