Where can i get a new ac adapter for my Lemark

Personally, i would go on the the Lexmark web site.

Find either a dealer/service centre/or retail store near you.

Take down all the information and make some calls to all of the above.

Alternatively..if u know the watts/volts etc of the adapter, there are universal a/c adapters out there that have adjustable settings and ends to suit a variety of needs.

Get $'s on both and go from there.

Good luck.