Quote Originally Posted by Simon Barden View Post
You could always try squirting some contact cleaner into the 9v socket, then push the adapter in and out a few times to see if that clears any dirty or corroded contacts.

Also worth double-checking that you didn't connect the new battery clip wires the wrong way round.

Cheers mate, I guess I could have tried cleaning the contacts, but it's easy enough just to replace the original DC in socket altogether cause I've found a replacement for it that I know is a good one, when I soldered in the new battery clip, I triple-checked that I got the polarity correct.