Dell 640M Laptop User Manual


 
Troubleshooting 97
CHECK THE AC ADAPTER Check the AC adapter cable connections. If the AC adapter has a light,
ensure that the light is on.
CONNECT THE COMPUTER DIRECTLY TO AN ELECTRICAL OUTLET Bypass power protection devices, power
strips, and the extension cable to verify that the computer turns on.
ELIMINATE POSSIBLE INTERFERENCE Turn off nearby fans, fluorescent lights, halogen lamps, or other
appliances.
ADJUST THE POWER PROPERTIES See "Power Management Modes" on page 39.
RESEAT THE MEMORY MODULES If the computer power light turns on but the display remains blank,
reinstall the memory modules (see "Optical Drives" on page 114).
Ensuring Sufficient Power for Your Computer
Your computer is designed to use the 90-W AC adapter; for optimum system performance, you should
always use this adapter.
The 65-W AC adapters used in other Dell™ portable computers can be used with your computer, but
they will decrease system performance. Using less-powerful AC adapters, including the 65-W AC adapter,
will cause you to receive a WARNING message.
Printer Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product
Information Guide.
NOTE: If you need technical assistance for your printer, contact the printer’s manufacturer.
E
NSURE THAT THE PRINTER IS TURNED ON
CHECK THE PRINTER CABLE CONNECTIONS
See the printer documentation for cable connection information.
Ensure that the printer cables are securely connected to the printer and the computer.
TEST THE ELECTRICAL OUTLET Ensure that the electrical outlet is working by testing it with another
device, such as a lamp.
VERIFY THAT THE PRINTER IS RECOGNIZED BY WINDOWS
1
Click the
Start
button, click
Control Panel
, and then click
Printers and Other Hardware
.
2
Click
View installed printers or fax printers
.
If the printer is listed, right-click the printer icon.
3
Click
Properties
and click the
Ports
tab. For a parallel printer, ensure that the
Print to the following
port(s):
setting is
LPT1 (Printer Port)
. For a USB printer, ensure that the
Print to the following
port(s):
setting is
USB
.
REINSTALL THE PRINTER DRIVER See the printer documentation for instructions