I've got a Toshiba PCX2200 Cable Modem. It has 5 lights and each light is named, Cable, PC, Data, Test, and Power. Whenever I turn my PC off the Cable light is still on, the PC light is still on and the Power light is still on and the Data light is still blinking like it should. The test light never does anything. But the thing I'm wanting to know is, why does the data light keep blinking when my PC is shut down and I have no files transferring or downloading??? And I'm certainly not running a server or file-sharing program.