HP ProDesk 400 G2 User Manual

Control panel message Description Recommended action
4. Replace keyboard.
Parity Check 2 Parity RAM failure. Run Computer Setup and Diagnostic utilities.
Interpreting POST diagnostic front panel LEDs and audible codes
This section covers the front panel LED codes as well as the audible codes that may occur before or during
POST that do not necessarily have an error code or text message associated with them.
WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system
board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect
the power cord from the wall outlet and allow the internal system components to cool before touching.
NOTE: If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the
computer and refer to the following table to determine the front panel LED codes.
Recommended actions in the following table are listed in the order in which they should be performed.
Not all diagnostic lights and audible codes are available on all models.
Activity Beeps Possible cause Recommended action
White Power LED On. None Computer on. None
White Power LED flashes every
two seconds.
None Computer in Suspend to
RAM mode (some models
only) or normal Suspend
mode.
None required. Press any key or move the mouse to
wake the computer.
Red Power LED flashes two
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
2 Processor thermal
protection activated:
A fan may be blocked or not
turning.
OR
The heat sink/fan assembly
is not properly attached to
the processor.
1. Ensure that the computer air vents are not
blocked and the processor cooling fan is
running.
2. Open hood, press 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.
3. If fan is plugged in, but is not spinning, then
replace heat sink/fan assembly.
4. Contact an authorized reseller or service
provider.
Red Power LED flashes three
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
3 Processor not installed (not
an indicator of bad
processor).
1. Check to see that the processor is present.
2. Reseat the processor.
Red Power LED flashes four
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
4 Power failure (power supply
is overloaded).
1. Open the hood and ensure the 4 or 6-wire
power supply cable is seated into the
connector on the system board.
2. Check if a device is causing the problem by
removing ALL attached devices (such as hard,
diskette, or optical drives, and expansion
cards). Power on the system. If the system
enters the POST, then power off and replace
one device at a time and repeat this procedure
Interpreting POST diagnostic front panel LEDs and audible codes 123

HP ProDesk 400 G2 Specifications

General

Tcase	72 °C
Bus type	DMI2
Stepping	C0
Processor cache	2 MB
Processor cores	2
Processor model	G1840
System bus rate	5 GT/s
Processor family	Intel® Celeron® G
Processor series	Intel Celeron Processor G1000 Series for Desktop
Processor socket	LGA 1150 (Socket H3)
Processor codename	Haswell
Processor frequency	2.8 GHz
Processor cache type	L2
Processor lithography	22 nm
Processor manufacturer	Intel
Processor front side bus	- MHz
PCI Express slots version	3.0
Processor operating modes	32-bit, 64-bit
ECC supported by processor	Yes
PCI Express configurations	1x16, 2x8, 1x8+2x4
Thermal Design Power (TDP)	54, 53 W
Number of processors installed	1
Maximum number of PCI Express lanes	16
Memory types supported by processor	DDR3-SDRAM
Memory clock speeds supported by processor	1333 MHz
Memory bandwidth supported by processor (max)	21.3 GB/s
Maximum internal memory supported by processor	32 GB
Memory slots	2x DIMM
Internal memory	4 GB
Memory channels	Dual-channel
Memory clock speed	1600 MHz
Internal memory type	DDR3L-SDRAM
Memory layout (slots x size)	1 x 4 GB
Storage media	HDD
Optical drive type	DVD Super Multi
Card reader integrated	No
Total storage capacity	500 GB
Discrete graphics card model	Not available
On-board graphics card model	Intel® HD Graphics
Maximum on-board graphics card memory	1.024 GB
On-board graphics card OpenGL version	4.3
On-board graphics card base frequency	350 MHz
On-board graphics card DirectX version	11.1
On-board graphics card dynamic frequency (max)	1050 MHz
Number of displays supported (on-board graphics)	3
Ethernet LAN data rates	10, 100, 1000 Mbit/s
USB 2.0 ports quantity	6
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity	0
Power supply	180 W
Product type	PC
Market positioning	Business
Chassis type	Desktop
Product color	Black
Country of origin	China
Placement supported	Horizontal
Sustainability certificates	ENERGY STAR
Operating system installed	Windows 7 Professional
Operating system architecture	64-bit
Scalability	1S
Processor code	SR1VK
Processor ARK ID	80800
Processor package size	37.5 x 37.5 mm
Supported instruction sets	SSE4.1, SSE4.2
Thermal solution specification	PCG 2013C
Intel Secure Key Technology version	1.00
Intel Stable Image Platform Program (SIPP) version	0.00
Intel segment tagging	Enterprise, Small Business

Weight and Dimensions

Depth	358.8 mm
Width	165 mm
Height	355 mm
Weight	6500 g