HP LaserJet 2300L
The HP LaserJet 2300L printer prints letter-size paper at speeds up to 20 pages per minute (ppm) or A4-size paper at up to 19 ppm. It comes with a built-in 250-sheet tray, a parallel and a universal serial bus (USB) port, and 32 MB RAM. The printer is expandable, and has one available enhanced input/output (EIO) slot and two dual inline memory module (DIMM) slots for adding a network print server card, fonts, and memory.

HP LaserJet 2300
The HP LaserJet 2300 printer is the same as the HP LaserJet 2300L printer, except that it prints at speeds up to 25 ppm for letter-size paper and 24 ppm for A4-size paper.

HP LaserJet 2300d
The HP LaserJet 2300d printer is the same as the HP LaserJet 2300 printer, except that the printer comes with 48 MB RAM and automatically duplexes (prints on both sides of paper).

HP LaserJet 2300n
The HP LaserJet 2300n printer is the same as the HP LaserJet 2300 printer, except that it is designed for network users. It comes with a full-featured HP Jetdirect EIO print server card (for connecting to a 10/100Base-TX network) and 48 MB RAM.

HP LaserJet 2300dn
The HP LaserJet 2300dn printer is the same as the HP LaserJet 2300n printer, except that the printer also automatically duplexes (prints on both sides of paper).

HP LaserJet 2300dtn
The HP LaserJet 2300dtn printer is the same as the HP LaserJet 2300dn printer, except that it has an additional 500-sheet tray.

Basic fault isolationThe troubleshooting process is a systematic approach that first addresses the major problems first and then other problems to discover the causes for printer malfunctions and errors. The "Troubleshooting process flow" page illustrates the major steps for troubleshooting the printing system. Each heading depicts a major troubleshooting step. A “YES” answer to the questions allows troubleshooting to proceed to the next major step.
A “NO” answer indicates that additional testing and correction is needed. Proceed to the referenced location in the chapter and follow the directions there. After completing the additional testing and correcting the problem, proceed to the next major step.

Note It is important to always follow this process in sequence. Failure to do so can result in increased repair time, difficulty, and expense.