| HP LJ 1200 | |
| Light status | Description  "light off"  "light on"  "light blink" |
 | The printer is ready to print. |
 | The printer is receiving or processing data. |
 | The printer is in manual feed mode.
The printer is out of memory. |
 | The printer has an error. The door is open, the media is out, the toner cartridge is installed incorrectly, or the paper is jammed. |
 | A printer initialization is taking place. If all lights blink for a half second or longer in a sequence:
|
 | The printer has a fatal error. All lights are on. |
 | The printer has an accessory error. All lights are blinking. |
| Fatal error | |
 | Engine error. The formatter and engine are not communicating. |
| Laser/scanner error. The laser/scanner has a malfunction. |
 | Beam error. |
 | Motor error. |
 | Fuser error. The fuser has a malfunction. |
| Formatter internal RAM or ROM error. The RAM or ROM has an error. |
| Fan error. |
 | Scan buffer error. |
 | Miscellaneous interface error |
| General fatal error |