Old 3800 worth time and money?

[RogerB]

Just read the service manual. There is a porous waste pad under there for ink spills and borderless printing.

AS long as there's not too much ink it's probably best to leave well alone. You really need to find out if the leak is because of a faulty seal on the cartridge or some damage to the pin in the printer that engages with the valve. You can give it a clean with a cotton bud for starters.