Uno not picking up on my serial port

Ok guys I think I ******** up.

Ive read so many times dont run a servo directly from a Uno and I understand why but any case I was trying to debug a bit my external battery was flat it seems which I thought was impossible so i connected the servo to the Uno and it ran for 30 seconds or so.

The sketch I uploaded still works so the board is still running but now when i plug it in the pc it doesnt register under serial port tested my other Uno and that works.

Any advice guys please???

Many thanks

Never mind guys the board got a second life all of a sudden took it 24 hours probably just wanted a holiday. ;D