How can I fix my Panasonic DVD Recorder DMR-EZ48VEB? - colour disappeared?

I woke up this morning, switched on my DVD recorder and I got a black and white picture when yesterday all was colour. It does not matter whether I play a colour DVD, video or use the internal tuner, all I get is black and white. I don't think it is the Panasonic TX-L32X10BA TV I use as its own tuner is working fine, in colour.

I have scoured the recorder manual to no avail. Was there a software update whilst I slept? I have only had the recorder since December 14th but it has been working fine until today. I would be grateful for any advice.