HP Compaq dc7800 User Manual

Table D-17 Solving Front Panel Component Problems
A USB device, headphone, or microphone is not recognized by the computer.
Cause Solution
Device is not properly connected. 1. Turn off the computer.
2. Reconnect the device to the front of the computer and
restart the computer.
The device does not have power. If the USB device requires AC power, be sure one end is
connected to the device and one end is connected to a live
outlet.
The correct device driver is not installed. 1. Install the correct driver for the device.
2. You might need to reboot the computer.
The cable from the device to the computer does not work. 1. If possible, replace the cable.
2. Restart the computer.
The device is not working. 1. Replace the device.
2. Restart the computer.
USB ports on the computer are disabled in Computer Setup. Enter Computer Setup (F10) and enable the USB ports.
Solving Internet Access Problems
If you encounter Internet access problems, consult your Internet Service Provider (ISP) or refer to the
common causes and solutions listed in the following table.
Table D-18 Solving Internet Access Problems
Unable to connect to the Internet.
Cause
Solution
Internet Service Provider (ISP) account is not set up properly. Verify Internet settings or contact your ISP for assistance.
Modem is not set up properly. Reconnect the modem. Verify the connections are correct
using the quick setup documentation.
Web browser is not set up properly. Verify that the Web browser is installed and set up to work with
your ISP.
Cable/DSL modem is not plugged in. Plug in cable/DSL modem. You should see a “power” LED light
on the front of the cable/DSL modem.
Cable/DSL service is not available or has been interrupted due
to bad weather.
Try connecting to the Internet at a later time or contact your
ISP. (If the cable/DSL service is connected, the “cable” LED
light on the front of the cable/DSL modem will be on.)
The CAT5 UTP cable is disconnected. Connect the CAT5 UTP cable between the cable modem and
the computers’s RJ-45 connector. (If the connection is good,
the “PC” LED light on the front of the cable/DSL modem will be
on.)
248 Appendix D Troubleshooting Without Diagnostics

HP Compaq dc7800 Specifications

General

Tcase	73.3 °C
Bus type	FSB
Stepping	M0
Processor cache	2 MB
Processor cores	2
Processor model	E4600
System bus rate	- GT/s
Processor family	Intel® Core™2 Duo
Processor series	Intel Core 2 Duo E4000 Series
Processor socket	LGA 775 (Socket T)
Processor codename	Conroe
Processing Die size	111 mm²
Processor frequency	2.4 GHz
Processor cache type	L2
Processor lithography	65 nm
Processor manufacturer	Intel
Processor front side bus	800 MHz
Processor operating modes	64-bit
ECC supported by processor	No
Thermal Design Power (TDP)	65 W
CPU multiplier (bus/core ratio)	12
Number of Processing Die Transistors	167 M
Internal memory	1 GB
Internal memory type	DDR2-SDRAM
Maximum internal memory	8 GB
Memory layout (slots x size)	2 x 0.5 GB
HDD speed	7200 RPM
HDD interface	SATA
Optical drive type	DVD Super Multi
Total storage capacity	160 GB
Audio input	1
LightScribe	Yes
Networking features	Intel 82566DM Gigabit Network Connection
Graphics card RAMDAC	400 MHz
Storage drive controller	SATA 3, 0 Gb/s NCQ SMART VI
Discrete graphics card model	Intel® GMA 3100
Maximum graphics card memory	0.256 GB
Operating system installed	Windows Vista Business
USB 2.0 ports quantity	8
Chassis type	Mini Tower
Country of origin	China
Cable lock slot type	Kensington
Operating altitude	0 - 3048 m
Non-operating altitude	0 - 9144 m
Storage temperature (T-T)	-30 - 60 °C
Operating temperature (T-T)	10 - 35 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 90 %
Power supply	365 W
Product type	PC
Processor code	SLA94
Processor ARK ID	32242
Processor package size	37.5 x 37.5 mm

Weight and Dimensions

Depth	452 mm
Width	177 mm
Height	447 mm
Weight	11800 g