I have a Panasonic which is about 10 years old. Following a recent long distance move (packed in original box) it happened that I only played a few regular DVDs before attempting to watch a Blu-ray disk. When I did I was surprised to see a message it could not read the disk, even though it had been viewed before on this machine.
So I tried a couple more Blu-rays but again received message they could not be read. I began shopping for a replacement but decided to try one more time. Again loading different disks I initially got the same read failure. I also noticed the read time was longer than I remembered from when it was working. Then with one disk after seeing the same message I reloaded it. This time it began playing but did exhibit some pixilation.
The deck still plays regular DVDs normally but fails with Blu-rays. I don't know enough about them to understand if the reading mechanism for Blu-rays is separate from the standard laser reader? I assume there is nothing to reset on the Panasonic itself?
Because of the age of the deck I expect the only reasonable answer is to replace it rather than try for a repair?