[Ron Ramirez]

Phly Guy has already given some good pointers, to which I can add: Use Mohawk Extra Dark Walnut for the dark portions of the cabinet, Medium Walnut for the rest.

You can rub down the dark portions around the speaker grille, enough to remove the loose and flaking old veneer, without stripping it entirely - then spray on a few coats of Extra Dark Walnut. Selective refinishing, if you will. You will want to mask off the lighter parts of the cabinet, of course, before proceeding. You will find the low-tack masking tape to be your friend here - use old newspapers, and just enough masking tape to mask off the edges between dark and light portions of the cabinet - let the newspaper cover most of the lighter parts, rather than using rolls of masking tape over entire parts of the cabinet.

It's late and I'm tired...hopefully this makes some sense.

As for the missing veneer. That really dark inlay is very soft. You might be able to match it by cutting a piece of veneer to fit the hole where the missing portion is, darken it with several coats of Extra Dark Walnut toner, and then gluing the new, toned veneer into place.