I ran an ISP in Oklahoma City for 8 years. One free perk we provided was that we would 'fix' your Internet connection if you brought your computer in to us. This would serve two purposes: a) it saved us the time we'd spend on the phone with them fixing it remotely, and b) it made the customer feel good about the customer service.

The drawback to this approach was that often times things would happen to the computer immediately after the customer took it home, which would then be perceived as 'our fault'. Occasionally it was our fault, but usually it was something completely unrelated or already existing.

Shortly after one such visit to our office, a customer called us saying she couldn't get the computer to turn on. I asked the obvious, "is it plugged in?" and "is there a lightswitch on this outlet?". After about 5 minutes of me having her poke around, she mentioned it was dark behind her desk and she couldn't see very well. "Can you turn the light on?", I said. "No.", she said, "The power is off in the house!".