I have a Panasonic DMR EX 99V- it is displaying a U99 message. I have tried unplugging it and leaving it overnight and turning it on and off repeatedly but nothing has changed. The only function working is the clock display - DVD tray won't open or close. Is there a quick fix for this or does it need to go to a repair shop?
Have had it for 17 months. I don't think there was a power outage although I wasn't at home during the evening- I came back to find the U99 message and nothing I tried seemed to work
Tried your suggestion but no change!