Any 2 slot with a soft drink spill on it was pretty much a 2 week job. the customer would be told of what happened and told of it all. they had the option of purchasing a reconditioned other board with a warranty. If they elected to have their 2 slot repaired, it was (a couple o hundred bucksI wont say how much though)minimum with no warranty attached to the repair. The reason was due to the nature as this was a repair with a lousy rate of success.
the 2 slot located directly under the control panel attracted the soft drinks. The acid content would corrode and eat traces. In a typical repair, I would pretty much have to replace at least 3 flat pack buffer chips and all 4 cartridge connectors. By hand. While those parts were off the board, that gave me an opportunity to check the traces for continuity. If it was flaky, I would have to wire a jumper through a trace feedthrough to the other side of the board, scrape both sides and solder down before I was sure it would work. On some boards, I would do at least 50 or 60 of those.
That did not count corroded leads towards the buffer flatpack chips. Rewiring the melted traces from the cartridge connectors was not fun either.
After it was done, it was tested for a week extra, making a typical 3 week repair on it. It was NOT a money making repair, I can tell you that!
One board I thankfully never had to touch had rat byproducts on it and the traces literally were melting as we watched. We declared that board unrepairable immediately.