HP Pro 3400 User Manual (English)

Other manuals for HP Pro 3400

Questions and Answers:

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Christine SanchezAug 21, 2025
Why is my HP Pro 3400 Desktop performing poorly?
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  Brian GomezAug 21, 2025
  Poor performance on your HP Desktop can stem from several factors. The processor might be overheating, so ensure that the computer's airflow isn't blocked, maintaining a 10.2-cm (4-inch) clearance on all vented sides and above the monitor. Check that all fans are connected and functioning correctly, and that the processor heat sink is properly installed. Other causes could be a full or fragmented hard drive, low memory, a program not releasing reserved memory, a virus, or too many applications running. Try transferring data from the hard drive to create more space, defragmenting the hard drive, adding more memory, restarting the computer, running a virus protection program, or closing unnecessary applications.
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Gregory GriffinAug 22, 2025
What to do if my HP Pro 3400 Desktop won't respond to the USB keyboard or mouse?
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  William BlairAug 23, 2025
  If your HP Desktop isn't responding to your USB keyboard or mouse, it might be in standby mode. To resume, press the power button or any key. If that doesn't work, the system may have locked up, so try restarting the computer.
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Alexandra WhiteAug 25, 2025
What to do if my HP Pro 3400 Desktop computer powered off automatically and the Power LED flashes Red two times?
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  garciajoshuaAug 25, 2025
  If your HP Desktop computer powered off automatically and the Power LED flashes Red two times, it indicates that the processor thermal protection has been activated. This may happen if a fan is blocked or not turning, or if the heat sink is not properly attached to the processor. Ensure that the computer air vents are not blocked and the processor cooling fan is running. Open the hood, press the power button, and see if the processor fan spins. If the processor fan is not spinning, make sure the fan's cable is plugged onto the system board header. If the fan is plugged in but not spinning, replace the heat sink/fan assembly.
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Jared AyersAug 27, 2025
Why is there no sound on my HP Pro 3400 Desktop?
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  Stephen BennettAug 27, 2025
  If there's no sound or the sound volume is too low on your HP Desktop, the system volume may be set low or muted. Check the F10 BIOS settings to ensure the internal system speaker is not muted. Also, verify that external speakers are properly connected, powered on, and their volume control is set correctly. Use the system volume control in the operating system to ensure the speakers aren't muted and to increase the volume.
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Leslie SmithAug 29, 2025
What to do if my HP Pro 3400 Desktop seems to be locked up?
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  Danielle WilliamsonAug 29, 2025
  If your HP Desktop seems to be locked up, it could be that a program in use has stopped responding to commands. Attempt the normal Windows 'Shut Down' procedure. If this fails, press the power button for four or more seconds to turn off the power. To restart the computer, press the power button again.
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trobinsonAug 31, 2025
Why won't my HP Pro 3400 Desktop boot from the hard drive?
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  Jennifer GardnerAug 31, 2025
  If your HP Desktop won't boot from the hard drive, the device may be attached to a SATA port that has been hidden in Computer Setup, the boot order may not be correct, or the hard drive's 'Emulation Type' may be set to 'None.' Run the Computer Setup utility and ensure Device Available is selected for the device's SATA port in Security > Device Security. Run the Computer Setup utility and change boot sequence in Storage > Boot Order. Run the Computer Setup utility and change the 'Emulation Type' to 'Hard Disk' in the device's details under Storage > Device Configuration.
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Pamela DominguezSep 1, 2025
Why won't my HP Pro 3400 system boot from a USB flash drive?
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  Derek OsborneSep 1, 2025
  If your HP Desktop system won't boot from a USB flash drive, the boot order may not be correct, or Removable Media Boot may be disabled in the Computer Setup utility. Run the Computer Setup utility and change boot sequence in Storage > Boot Order. Run the Computer Setup utility and enable booting to removable media in Storage > Storage Options. Ensure USB is enabled in Storage > Boot Order.
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brauntravisSep 3, 2025
How to fix incorrect date and time on my HP Pro 3400?
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  Sherry ShermanSep 3, 2025
  If the date and time display is incorrect on your HP Desktop, the RTC (real-time clock) battery may need replacement. First, reset the date and time under Control Panel. If the problem persists, replace the RTC battery.
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Mark AlvarezSep 5, 2025
How to fix intermittent power supply shutdowns on my HP Desktop?
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  nicholas75Sep 5, 2025
  If the power supply on your HP Desktop shuts down intermittently, it could be due to the voltage selector switch on the rear of the computer chassis (on some models) not being switched to the correct line voltage (115V or 230V). Select the proper AC voltage using the selector switch. If that does not resolve the issue, the power supply may have an internal fault. Contact an authorized service provider to replace the power supply.
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Daniel StaffordSep 6, 2025
Why won't the cursor move with arrow keys on my HP Pro 3400 Desktop?
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  Micheal JonesSep 7, 2025
  If the cursor won't move using the arrow keys on your HP Desktop, the Num Lock key may be on. Press the Num Lock key to turn it off. The Num Lock light should not be on if you want to use the arrow keys.

HP Pro 3400 Specifications

General

Form Factor	Microtower
Processor	Intel Core i3, i5, or i7
Graphics	Intel HD Graphics
Optical Drive	DVD-RW
Operating System	Windows 7 Professional
Chipset	Intel H61
Networking	Gigabit Ethernet
Ports	USB 2.0, VGA