If i close the door the microwave automatically starts to heat up food, does not allow me to set timer etc

if you had the initiative to use google, you would have found this link previously posted on fixya.

http://www.fixya.com/support/t25247983-p90d23al_manual

google it first, you may find the answer already out 'there'.

http://manualsonline.com/support/morphy-richards/other/lost-user-manual-3867772m

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The problem is caused by a bad magnetron, inverter board, "7 years old or less" and possibily the keypad control board.

Hello


Power Supply

Check whether there is a proper power supply. Look to see whether the cord is connected to a grounded 3-prong outlet and the cord is fully plugged in. If the electrical system is built-in and no power cord is visible, replace or reset the household fuse or circuit breaker.

Microwave Functions

Some basic microwave operational steps may affect whether the microwave is heating. Open and close the microwave door, as the unit will not function with the door open, and push "Stop/Clear" to cancel any previous settings, such as the timer, which do not heat the microwave oven.

Setting the Microwave

Once the power to the microwave has been reset, or verified as working, and the microwave is ready to run, select a new cook cycle and press "Start" to see if the microwave begins to run and cook food as expected. Allow the food to cook for the alloted time and then open the microwave door and check to see if the food has cooked or heated. Choose a longer cooking time and restart the microwave if food is heating but is cooking slowly.

Repair

If all efforts to troubleshoot the function and power to the microwave still do not get the appliance heating food as expected, there may be a repair issue that needs to be addressed. Contact professional technician for advice.

sounds like a faulty door microswitch, if its still under g/tee take it back to the shop,if not have it checked out at local repair shop..i hope you find this of some help-

Actually there is a part installed in Microwave By the Name of Magnetron get it checked by techinician i do have the best way to resolve it in free of cost but get it checked first its dead or not

Go back to the dealer and insist that he give you your manual!

Same thing has happened to me. My brother in law seems to think it cant be fixed. Bought it Dec 2008 so no warranty.

Were you able to get anythihng out of morphy richards?