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HP ProOne 400 G4 AiO 23.8" FHD i5-8500T 8GB 256GB SSD Webcam DVDRW Windows 10 Home
  • HP 4YM16PA
  • HP ProOne 440 (ProOne 400) G4 AiO 23.8 NT, UMA/disc; 35W/65W (Rear facing)

Actual product may differ

Product was discontinued 23 Dec 19


Ready for versatile work environments
Easy to deploy, sleek, and feature-rich, the HP ProOne 400 23.8" All-in-One PC features a contemporary design with business-class performance, collaboration, security, and manageability features.
The HP ProOne 400 23.8-inch All-in-One features contemporary design, performance, collaboration, and security and manageability.


Operating system

  • Windows 10 Home 64 – HP recommends Windows 10 Pro.

Processor & chipset

  • Intel® Q370
  • Intel® Core™ i5-8500T with Intel® UHD Graphics 630 (2.1 GHz base frequency, up to 3.5 GHz with Intel® Turbo Boost Technology, 9 MB cache, 6 cores)
  • 8th Generation Intel® Core™ i5 processor
  • 2.1 GHz

Dimensions & weight

  • 48.91 x 20.85 x 36.67 cm
  • 5.77 kg


  • 8 GB DDR4-2666 SDRAM (1 X 8 GB)
  • 2 SODIMM


  • 256 GB PCIe® NVMe™ SSD
  • HP 9.5 mm Slim DVD-Writer
  • SSD

Display & graphics

  • Intel® UHD Graphics 630
  • 20" diagonal HD+ widescreen LCD anti-glare WLED-backlit (1600 x 900)
  • 250 nits

Camera, video & audio

  • 1 MP HD webcam with integrated digital microphone, maximum resolution of 1280 x 720
  • Conexant CX3601 codec, 2 W internal stereo speaker, headset and headphone side port (3.5 mm), multi-streaming capable

Keyboard, mouse & input

  • Universal USB wired keyboard
  • HP USB Optical Mouse

Ports & expansion

  • 1 M.2 2230
    1 M.2 2230/2280
  • 1 slim ODD
  • One 2.5" HDD
  • All-in-one

Networking & connectivity

  • Intel® I219LM GbE

Power, battery & charging

  • 120 W external power adapter, up to 89% efficiency, active PFC
    90 W external power adapter, up to 89% efficiency, active PFC


  • 3 year (3-3-3) limited warranty and service offering includes 3 years of parts, labor and on-site repair. Terms and conditions vary by country. Certain restrictions and exclusions apply.

Environment & safety

  • ENERGY STAR® certified
  • 10 to 90% RH
  • Low halogen
  • 10 to 35°C

Security & management

  • DriveLock
    Hood sensor
    HP BIOSphere
    HP Credential Manager
    HP Password Manager
    HP Power On Authentication
    HP Security Manager
    HP Spare Key
    Intel® Identity Protection Technology (Intel® IPT)
    Power-on password (via BIOS)
    Removable media write/boot control
    SATA port disablement (via BIOS)
    Setup password (via BIOS)
    Support for chassis padlocks and cable lock devices
    Trusted Platform Module TPM 2.0 Embedded Security Chip (SLB9670 - Common Criteria EAL4+ Certified)
    USB enable/disable (via BIOS)
    Master Boot Record Security
    HP Client Security Suite Gen 4
    Pre-boot Authentication
    Serial enable/disable (via BIOS)

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