HP ProDesk 490 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 490 G2 Specifications

General

Tcase	72 °C
Bus type	DMI2
Stepping	C0
Processor cache	3 MB
Processor cores	2
System bus rate	5 GT/s
Processor family	Intel® Core™ i3
Processor series	Intel Core i3-4100 Desktop series
Processor socket	LGA 1150 (Socket H3)
Processor threads	4
Processor codename	Haswell
Number of QPI links	0
Processor frequency	3.7 GHz
Processor cache type	L3
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 W
Number of processors installed	1
Maximum number of PCI Express lanes	16
Memory types supported by processor	DDR3-SDRAM, DDR3L-SDRAM
Memory voltage supported by processor	1.5 V
Memory clock speeds supported by processor	1333, 1600 MHz
Memory bandwidth supported by processor (max)	25.6 GB/s
Maximum internal memory supported by processor	32 GB
On-board graphics card ID	41
Discrete graphics card model	Not available
On-board graphics card model	Intel® HD Graphics 4400
On-board graphics card family	Intel® HD Graphics
Maximum on-board graphics card memory	1.74 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)	1150 MHz
Number of displays supported (on-board graphics)	3
Memory slots	4x DIMM
Internal memory	4 GB
Memory channels	Dual-channel
Memory clock speed	1600 MHz
Internal memory type	DDR3-SDRAM
Memory layout (slots x size)	1 x 4 GB
HDD speed	7200 RPM
HDD interface	SATA
Storage media	HDD
Optical drive type	DVD±RW
Total storage capacity	500 GB
Intel segment tagging	Enterprise, Small Business
Operating system installed	FreeDOS
Operating system architecture	64-bit
Wi-Fi	No
Cabling technology	10/100/1000Base-T(X)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Chassis type	Micro Tower
Product color	Black
Country of origin	China
Placement supported	Vertical
Product type	PC
Motherboard chipset	Intel® H97
Power supply	180 W
Power supply input voltage	100 - 240 V
Power supply input frequency	50 - 60 Hz
Operating temperature (T-T)	10 - 35 °C
Operating relative humidity (H-H)	10 - 90 %
Sustainability certificates	ENERGY STAR
Scalability	1S
Processor code	SR1PL
Processor ARK ID	77490
Processor package size	37.5 x 37.5 mm
Supported instruction sets	AVX 2.0, 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

Weight and Dimensions

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