Ayon CD 1 acting up

I have an Ayon CD 1 that is about 4 years old. On two occasions in the last week or so, while playing a CD there was a static noise that increased over a couple of seconds and then no sound. I stopped the CD and restarted it on each occasion and then it started playing again normally without an issue.

This has been an isolated issue but I was wondering what was causing it. Could a tube be going bad?