Hi! I have a HP Laserjet 1200 which printed with smudges and ghost text a few lines down. In an attempt to correct this, I installed a new toner cartridge. I had difficulty opening the toner door completely; it stuck about half-way opened. I opened the left and right panels to see if I could loosen the old cartridge, and something snapped (probably a plastic clip) when I forced the right panel open. Opening the panels didn't help, and I closed them. Eventually, after applying some pressure, I opened the toner door all of the way and replaced the toner. Now the printer doesn't work. The yellow light just flashes. Replacing the old toner cartridge doesn't help. I still have the same blinking yellow light problem. Does anyone have any ideas on this?