I have a panasonic range microwave oven model NN-H264/S254 clock cannot be set. (It use to work but no longer can be set)

https://www.manualslib.com/products/Panasonic-Nn-St652w-3493267.html


Panasonic NN ST652W Manuals

hi carol.
try this,if this does not work go to the link.
Press "Clock" or "Timer/Clock" again - colon stops flashing; time of day is set. You are now ready to use your new Panasonic Microwave Oven. When you first turn on yourmicrowave oven and under normal operation the "CHILD LOCK" feature is off. If "LOCK" or "CHILD" appears on your display . . .

set-up guide - Panasonic

ftp://ftp.panasonic.com/microwaveoven/om/set-up_guide_en_om.pdf
How to reset the clock on Panasonic NN SA651S microwave Google Search

my over the range panasonic microwave turns off after 5 seconds????

hit clock button press in the time with the numbers on the pad and press the clock button time solved

If unit is built-in reove screws holding unit to cabinet.
Slide out about 2 inches to access 3 screws holding grill.
Remove grill to get to two screws holding control panel.
Fuse is behind control panel,

Try unplugging the microwave for about 30 seconds, then plug back in. This may work. What you are doing is resetting the micro processor.

Microwave fuses are normally located either on a filter board near where the power cord comes in, behind the control panel between the door switches, or behind the control panel in a hodler, sometimes on the floor of the chassis.

If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa.

At our site, we have a video showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find an authorized Panasonic servicer here.

You can order Panasonic parts from Tritronics, but if you don't find what you're looking for there, try here.

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

fdghfd f hf

Sounds like the power inverter

This door screen as it's called protects the metal mesh screen from moisture and food debris. The door screen must be replaced or the mesh screen can arc and be damaged, which can lead to microwave leakage. You can order a new screen from Panasonic at: http://www.pasc.panasonic.com/Epartr/PartsListChoice.asp It may be this part: F31455H00AP DOOR SCREEN A 5.75 But it might be better to call Panasonic at 800-833-9626 and be sure this is the right part. Be sure to have your FULL model nuber (with suffix) when you call. Be sure to use a cleaner like acetone, etc. to remove all the old adhesive before applying the ne wone, or it will not stick. The door must be squeaky clean and dry.