| HP LJ 1100 | |
| Light status | Description  "light off"  "light on"  “light blinking" |
 | PowerSave mode (or the printer is off)
The printer uses PowerSave mode to conserve energy. |
 | Ready
The printer is ready to print. |
 | Processing Self test page Form Feed
The printer is receiving or processing data. |
 | Buffered data
The printer memory is retaining unprinted data. A file has been sent to the printer that does not contain a from feed at the end. |
 | Manual feed
The printer is in manual feed mode. The printer is waiting for a different size sheet of paper to be placed in the Single Sheet
Input Slot or Paper Input Bin. |
 | Door open, no Toner Cartridge, or paper jam
The printer is in an error state. |
 | Paper out
The printer is out of paper. |
 | Memory out
The printer ran out of memory in the middle of a print job. |
 | Reset/Printer initialization
The printer memory is being reset and all previously sent print jobs are being purged. Or, a printer initialization is taking place. All lights blink for 1/2 of a second or longer if initializing. |
 | Fatal error
All lights are on.
Press the Go key to see the secondary light pattern. |
| Fatal error |
 | ROM/RAM Error. An error was found with the ROM or RAM. The printer believes that the ROM is corrupted or an error has been found in the RAM. |
 | Fuser Error. This indicates a fusing assembly malfunction.
NOTE: Chronic fuser failures, fuser overheating, or both are indicators of an uninterruptible power supply or battery backup being used with the printer. Uninterruptible power supplies (UPSs) should not be used with the printer. |
 | Beam Error. There are a number of causes for this error, and some of the causes may disappear. |
| Print Engine Error. The formatter and engine are not communicating. |
| Printer Laser/Scanner Error. Caused by a laser scanner malfunction. |
| Firmware Error.
Note the LED patterns on the BiTronics error code. Contact HP technical support with this information as well as a description of what data was sent, the errors encountered prior to the firmware error, the condition of the printer prior to the error, and any other information that may help isolate the error. |
 | Incompatible DIMM Error (Accessory Error). |
| Document Scan Engine Error. |
| Document Scan Engine NVRAM Error. |
