[pio_masaki]

Well tell us what you are doing, in steps, in order and we can tell you if it's normal or not. Press the power + record + reset buttons at the same time (I go power-record-reset it works for me as long as all 3 are done at the same time at some point). The screen will go black, but it will say USB up top and VX.XX on the bottom. VX.XX is the version you need to select in the kitchen when building the ROM to be put in. Like PDAJ said, use a flashlight or hold it under a light (or the sun in the window whatever is bright) and move the screen angle until you can see it. It's faint, but it's there. In XP disable USB connection in active sync (not required but I do it anyways) and in vista disable USB connection in whatever that thing is called that syncs your handhelds in vista (I use xp lol). If not it overrides the kitchen RUU and you can't flash, it will fail. I also disconnect from USB, then go into boot loader, then plug it in, may help.