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System does not power on and the LEDs on the front of the computer are not flashing.

Cause Solution

System unable to power on. Press and hold the power button for less than 4 seconds. If the

hard drive LED turns green, then:

1. If equipped with a voltage selector, check that the

voltage selector (located on the rear of the power supply)

is set to the appropriate voltage. Proper voltage setting

depends on your region.

2. Remove the expansion cards one at a time until the

5V_aux light on the system board turns on.

3. Replace the system board.

Press and hold the power button for less than 4 seconds. If the

hard drive LED does not turn on green then:

1. Check that the unit is plugged into a working AC outlet.

2. Open the access panel and check that the power button

cable is properly connected to the system board.

3. Check that the power supply cables are properly

connected to the system board.

4. Check to see if the 5V_aux light on the system board is

turned on. If it is turned on, then replace the power

button assembly.

5. If the 5V_aux light on the system board is off, then

replace the power supply.

6. Replace the system board.

Solving Power Problems

Common causes and solutions for power problems are listed in the following table.

Table 8-2 Solving Power Problems

Power supply shuts down intermittently.

Cause Solution

If equipped with a voltage selector, voltage selector switch on

rear of computer chassis (some models) not switched to

correct line voltage (115V or 230V).

Select the proper AC voltage using the selector switch.

Power supply will not turn on because of internal power

supply fault.

Replace the power supply.

152 Chapter 8 Troubleshooting Without Diagnostics

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General

Processor cache	1 MB
Processor cores	2
Processor model	A6-6400B
Processor family	AMD A6
Processor socket	Socket FM2
Processor frequency	3.9 GHz
Processor cache type	L2
Processor manufacturer	AMD
Processor boost frequency	4.1 GHz
Number of processors installed	1
Memory slots	4x DIMM
Internal memory	4 GB
Memory clock speed	1600 MHz
Internal memory type	DDR3-SDRAM
Maximum internal memory	32 GB
Memory layout (slots x size)	1 x 4 GB
HDD size	3.5 \
HDD speed	7200 RPM
HDD interface	SATA
Storage media	HDD
Optical drive type	DVD Super Multi
Card reader integrated	-
Total storage capacity	500 GB
On-board graphics card	Yes
Discrete graphics card model	Not available
On-board graphics card model	AMD Radeon HD 8470D
On-board graphics card family	AMD Radeon HD 8000
Recovery operating system	Windows 8 Pro
Operating system installed	Windows 7 Professional
Operating system architecture	64-bit
Wi-Fi	No
Cabling technology	10/100/1000Base-T(X)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
HDMI ports quantity	0
USB 2.0 ports quantity	6
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	4
Chassis type	Micro Tower
Product color	Black
Country of origin	China
Product type	PC
Motherboard chipset	AMD A75
Power supply	320 W
Operating temperature (T-T)	10 - 35 °C
Operating relative humidity (H-H)	10 - 90 %