20 Most Recent Sharp 30" Built-in Trim Kit for R530BS and R530ES RK51S30 - Page 3 Questions & Answers

The Sharp part number is in the service manual readily downloadable from the interweb.

Possibly directly from Sharp

Could be door interlock or related wiring failure

The drive motor or control board may have failed.

Probably a new membrane is required.

Could be door interlock failure

first check the plug point

Most microwave ovens now use a similar method for setting the time on the front. Many different kitchen counter appliances like microwave ovens are made by the same manufacturers and sold under different brand names or with similar parts and designs. Microwaves, coffee makers, air fryers, convection ovens and even some toaster ovens have clocks on them these days and trying to set all the clocks during Daylight Saving Time can be a hassle. Fortunately, most of these kitchen appliances have adopted a general method for changing and setting the time: The Clock Button! If your device has a Clock button you typically only have to hit it once or hold it in, either type in the new time or advance up or down to the new time on the display, and then press the Clock or Start button to save your changes and get your out of "time changing" mode. Many other small appliances are following this same methodology. It's quick and easy!

A lot of times on the sharp microwave they have a series of plastic levers and linkage that have to push up and down to latch your door and close the switches inside if one of the switches inside does not close properly the machine thinks the door is open so it will not allow it to run or heat when you open the door look at the little hooks that are sticking out of the door and try to push them up and down and make sure that they have a spring action to them if they do not or one is loose then that is where your problem is

Don't know exactly but internet seems to think the model was manufactured 2006 - 2012.

It is unlikely you will be able to get a replacement without sending to the manufacturer. This is likely to be expensive unless its in warranty.

I haven't even seen a microwave drawer yet - I don't think many are sold here in the UK. Sharp used to make quality equipment but the quality dropped and kept dropping until very little Sharp gear is sold here, in fact I heard they have almost withdrawn from the European market. The microwave drawer is almost exclusive to Sharp as they were the inventors and own the patent... Although the arrangement is different the working principle must remain the same and there are two distinctly separate parts, namely the timer and switching and the high tension side that generates the dangerously high voltage that drives the magnetron. Testing the high tension side is beyond the scope of the home tester though some basic ohm meter checks can provide a rough idea. An ordinary multimeter will allow the testing of the switching and supply side by checking whether mains power is being supplied to the high voltage transformer, or inverter if it is that type. The difficult part will be dismantling the unit for good access and I suspect the second most painful problem will be obtaining replacement parts. My last experience with Sharp told me their parts are priced not to sell, forcing users to buy a new appliance rather than repair. One small circuit board would have cost me more than double the cost of a replacement appliance.

If it's only 6 days old, I'd return it to where you bought it or I'd call Sharpe for warranty repair. I wouldn't open it up as there are potentially tamper stickers which will void the warranty.

if you`ve "just plugged it in", press clear / cancel on the panel, clears the dispaly

Free manual online for similar model: https://www.manualslib.com/manual/428690/Sharp-R306lw-Microave.html

Using an electrical tester will determine the cause within a short time.

Using an electrical tester you will be able to trouble shoot the issue quickly.

circuit failure

You can try and unplug it for 5 minutes, push the on button to make sure it's completely discharged. Then plug it in. If it does the same thing, it's toast. Getting it repaired will cost about the same as a new one on sale.