If the owner's manual doesn't offer that as an option, there are three ways:- desolder the piezoelectric element (beeper)- cut one of both of its leads- snap it out of the circuit board (see video)
Are you sure that Model Number is correct? There are 73 Oster Microwave Manuals here, but none of that model number designation. When in doubt 'Read the Manual'.
The kilograms settings are for meats and cakes and large objects. All microwaves have a seconds and minutes setting. Most also have presets for certain things like Pizza and Popcorn.
https://www.manualslib.com/brand/oster/microwave-oven.html
This is the search query for your model
https://www.google.com/search?q=Oster+OGGW3803+manual
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The issue you are describing with your Oster microwave, where it only allows you to use it by pressing one button and then none of the buttons work again until the microwave is unplugged, could be caused by a few different issues. Here are a few things you can check:
Check the control panel: Make sure that the control panel is not damaged or malfunctioning.
Check the circuit board: The control board may be malfunctioning, which can prevent the buttons from working properly.
Check the door switch: Make sure that the door switch is working properly. If the door switch is not working properly, the microwave may not function properly.
Check the touchpad: Make sure that the touchpad is not damaged or malfunctioning.
Check the power supply: Make sure that the power supply is providing the correct voltage and that it is not damaged.
Check the fuses: Check for any blown fuses, replace them if necessary.
If none of these steps resolve the issue, I would recommend contacting the Oster's customer support for further assistance. They may be able to provide additional troubleshooting steps or may recommend a qualified technician to repair the unit.
To set the time display, the steps usually are to first turn off the microwave oven completely. Then power it on. Touch the "Clock" or "set time" pad and key in the current time. Press the set pad to lock the time.
Is the plastic film a protective cover used during manufacture and shipment? This unit should be covered under warranty. Call service number in papers that came with unit.