How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Techdesk Your Own Question
Techdesk, Service Engineer
Category: Appliance
Satisfied Customers: 16409
Experience:  Whitegoods engineer working for a multibranded national company in the UK
Type Your Appliance Question Here...
Techdesk is online now

Panasonic NN-cf778s combination ovenMy Oven has stopped

Customer Question

Panasonic NN-cf778s combination oven My Oven has stopped operating and the only thing visible is a faint back light on the screen. no buttons work, not numbers come up on the screen... Do you know what this might be?? Machine is 3 years old. many thanks



Submitted: 3 years ago.
Category: Appliance
Expert:  Techdesk replied 3 years ago.
Have you tried the "unplugging" for 20 minutes routine?
See if it's a glitch that's sorted out by rebooting?

Customer: replied 3 years ago.

Yes ... we have had it off for several hours and re tried it without success!

Expert:  Techdesk replied 3 years ago.
OK, thanks for that.
Had to ask, just in case.

I think you've probably already realised that the electronics have failed.

Programming is held on the front boards and nothing showing would suggest a failure on these boards.

As the back lit is glowing it shows power is getting to the board.

Be aware, microwave ovens can store a charge in excess of 4000 volts, even when unplugged.

Unplug the machine.
Take the cover off.
Unplug and plug back onto the front boards all the connections.

Once done, plug it back in and see if you have a display.

If still the same, you'll need to replace the boards to cure the problem.

Check it out, see what you find and get back to me.

If you don't want to, or can't, repair it yourself, let me know and I'll advise on the most economical repair method.

It will be an expensive repair I'm afraid as the parts aren't inexpensive.

Hope this helps
Customer: replied 3 years ago.

Sorry was at work ... now home and have removed all plugs as suggested.

This has not changed anything, apart from the screen which is now just flashing rather than a constant glow.

Expert:  Techdesk replied 3 years ago.
OK, thanks for that.

As I said earlier, it's going to be a fairly expensive repair.

You might want to check out British Gas and Knowhow (Currys) to see if they cover your area.
They have a fixed price repair offer that covers parts and labour.
Could well be the most economical repair.

Customer: replied 3 years ago.

Are the boards something I can replace myself or might this not be the problem?

I am a handy type of tradesman, part p etc...



Expert:  Techdesk replied 3 years ago.
Yes, you could.

Price the new boards up first though.

Remember though, the board failure could be the result of another fault and it won't manifest until the new board is fitted.