HP Monitor LE1901wm - Manual (Page 16)

Locating the Rating Labels
The rating labels on the monitor provide the spare part number, product number, and serial number.
You may need these numbers when contacting HP about the monitor model. The rating labels are
located on the rear panel of the monitor.
Figure 3-6 Locating the Rating Labels
10 Chapter 3 Setting Up the Monitor ENWW