HP Compaq dc5750 MT Troubleshooting Guide

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. Check that the voltage selector, located on the rear of the
power supply on some models, 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.
OR
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 hood and check that the power button harness is
properly connected to the system board.
3. Check that both 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
harness.
5. If the 5V_aux light on the system board is off, then replace
the power supply.
6. Replace the system board.
Table 2-1 Solving General Problems (continued)
ENWW Solving General Problems 13

HP Compaq dc5750 MT Specifications

General

Chipset	ATI Radeon Xpress 1150
Memory	Up to 4 GB DDR2 SDRAM
Network	Integrated Broadcom NetXtreme Gigabit Ethernet
Audio	Integrated High Definition audio
Power Supply	300W
Processor	AMD Athlon 64 X2, AMD Athlon 64, AMD Sempron
Graphics	Integrated ATI Radeon Xpress 1150 or optional discrete graphics
Optical Drive	DVD-ROM, DVD+/-RW
Expansion Slots	1 PCI Express x16
Ports	1 serial, 1 parallel, 2 PS/2, 1 VGA, 1 audio in, 1 audio out
Operating System	Windows XP Professional
Dimensions	16.5 inches
Storage	SATA Hard Drive