Help Weird power issues - even when switched off!



Hope someone can advise on this.

I've had the S2 for about four weeks now - entirely trouble free - until Saturday.

The phone started to make odd noises and I couldn't silence them at all, without turning the vol down. I also switched the phone off (or at least thought I did!) and shortly afterwards, the issue continued. Sunday and yesterday no problems. This morning they started again. I only realised what was happening when I noticed that the battery icon intermittently flashed with the charging logo withn the battery icon. One second at a time, but lasted for an hour or two.

Switched the phone off again (or didn't) and also removed the battery and it's now stopped but could start any time soon again I suppose.

Any ideas? Sorry for the long post but it was difficult to describe this issue and for the title too.