HELP!!! My HP Laserjet 1300, that has worked for several years, is now displaying a yellow flashing light. I've checked the paper (filled), and I've replaced the toner cartridge as an attempt to resolve the problem. I've turned it off and on again, unplugged and plugged it back in (to both the electrical outlet and the USB), and I've restarted the computer. The computer is recognizing the printer but the printer still just flashes the yellow light. Does anyone have any other ideas to clear that error light??