HP B421 42-inch LED Digital Signage Display
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HP B421 42-inch LED Digital Signage Display

HP B421 42-inch LED Digital Signage Display

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Typical locations you may find a serial number on your product:
  • Back of product
  • Under the battery
  • For laptops, press  Fn + Esc
  • For desktops, press Ctrl + Alt + s
  • For Chromebooks, on the sign in screen, press Alt + v
  • On the barcode

Product specifications

Display size
Aspect ratio
Native resolution
1920 x 1080
Resolutions supported
1920 x 1080; 1680 x 1050; 1600 x 900; 1440 x 900; 1280 x 1024; 1280 x 800; 1280 x 720; 1024 x 768; 800 x 600; 720 x 400; 640 x 480
Pixel pitch
0.4845 mm
350 cd/m² [1]
Contrast ratio
3000:1 static [1]
View angle
178° horizontal; 178° vertical
Onscreen controls
Menu; Input; Channel up/down; Volume plus/minus; Power
Display features
Plug and Play; Anti-glare; User programmable; Language selection; On-screen controls
Input connector
1 VGA; 1 DVI-D (with HDCP support); 1 HDMI (with HDCP support); 1 YPbPr component video
1 USB 2.0; 1 RJ-45; 1 RS232 input; 1 RS232 output; 1 IR input; 1 IR output; 1 S/PDIF; 1 audio in; 1 audio output (RCA right); 1 audio output (RCA left); 1 audio input (RCA right); 1 audio input (RCA left) USB 2.0 input for playing multimedia files. RJ45 Input for command and control and playing media files from a PC over the Ethernet connection. IR input/output for receiving and sending IR control signals.
Two 7 W integrated speakers
90 to 264 VAC
Power consumption
104 W (maximum), 88 W (typical), 0.5 W (standby)
Operating humidity range
20 to 80% RH
Energy efficiency
ENERGY STAR® qualified
Mercury-free display backlights; Arsenic-free display glass; Low halogen [2]
Certifications and compliances
CB; FCC; BSMI; CCC; NOM; China Energy Label Grade 1; SmartWay Transport Partnership (NA); Microsoft WHQL Certification
What's in the box
Monitor; VGA cable; HDMI cable; Wireless remote control; AC Power cable; CD with User Guide, warranty, drivers
Tech spec footnote
[1] All specifications represent the typical specifications provided by HP's component manufacturers; actual performance may vary either higher or lower.
Tech spec footnote
[2] This product is low halogen except for power cords, cables and peripherals. Service parts obtained after purchase may not be low halogen.

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