I did not get the sharp r-303cw microwave users guide.

It sounds like your membrane keypad may be shorted.

If you'll contact me with the full model number from your tag, I'll give you all the information you would need. In many cases, this is a do-it-yourself repair.

http://www.microwavecontrol.com

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The clock is part of the control board and cannot be repaired as a separate item. Most replacement control boards costs as much as
a new microwave.

You can find many of them online here.

Otherwise, you would have to order yours.

You can order Sharp parts and manuals from Encompass here or you can call them toll-free at 866-779-5835.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

I haven't found the instruction manual available as a free download online. However, there are several places to buy a copy. Sears Parts Direct has a printed copy for sale for $4.49 here: http://www.searspartsdirect.com/partsdirect/part-model/Sharp-Parts/Microwave-Parts/Model-R303CW/0958/0123245/50022360/00001?blt=06&prst=&shdMod= . The current part number is IB-R303CK. Searching for the part number gave several other sites with the manual available.

The Sharp R-308K is a very similar microwave and that manual is available as a free download. See http://www.managemylife.com/mmh/owner_manuals/7167/SHARP-Countertop-Microwave-L0906397?brand_name_search=Sharp+microwave .

I hope this helps.

Cindy Wells

mcdevito75 here, Best Bet, contact Sharp online, try sharp microwave oven.com Or in any store that sells Sharp microwave ovens get contact info off that package.

Cheapest here:
http://shop.ebay.com/?_from=R40&_trksid=p3984.m38.l1313&_nkw=NTNT-A079WRE0&_sacat=See-All-Categories
Eric

Here is a link to your manual that you can copy and paste in your internet address bar;

http://www.nodevice.com/manual/newmans/upsharp/R303CWPDF/get52699.html

or

www.curtisint.com/html/custservice/.../SUN_SMW5500_EN.PDF

http://www.fixya.com/support/r4964670-get_manual_most_any_electronic_device

defrost, than number 1-5 (should just use 5) then amount of pounds like 3.0, 4.0, 5.0