In service mode, hold down the fire button and press the stick up five times, right six times, down once, and left four times to make a hidden message appear. (gamerankings.com)
In November 2008, Datel announced a «Lite Blue Tool» battery which allows the PSP - 3000 to boot into service mode. (8-bitcentral.com)
Their businesses tend to grow fairly well in the startup and early growth phase, but as soon as their personal income hits preset targets, their internal thermostat kicks in and they go into customer service mode. (entrepreneur.com)