HP LaserJet 4610n - Manual (Page 206)

Installing memory
You can install more memory for the printer.
CAUTION Static electricity can damage DIMMs. When handling DIMMs, either wear an antistatic wrist
strap, or frequently touch the surface of the DIMM antistatic package and then touch bare
metal on the printer.
To install DDR memory DIMMs
1. Turn the printer off.
2. Disconnect all power and interface cables.
3. Locate the formatter board in the rear of the printer.
194 Appendix A Working with memory and print server cards ENWW