Dell Precision T7400 User's Guide - Page 100

C H E C K T H E N E T W O R K C A B L E C O N N E C T O R - Ensure that the network cable is firmly inserted into the network connector on the back of the computer and the network jack. C H E C K T H E N E T W O R K L I G H T S O N T H E B A C K O F T H E C O M P U T E R - If the link integrity light is off (see "Controls and Lights" on page 32), no network communication is occurring. Replace the network cable. RESTART THE COMPUTER AND LOG ON TO THE NETWORK AGAIN C H E C K Y O U R N E T W O R K S E T T I N G S - Contact your network administrator or the person who set up your network to verify that your network settings are correct and that the network is functioning. R U N T H E H A R D W A R E TR O U B L E S H O O T E R - See "Troubleshooting Software and Hardware Problems in the Microsoft® Windows® XP and Microsoft Windows Vista™ Operating Systems" on page 131. Power Problems CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. I F T H E P O W E R L I G H T I S G R E E N A N D T H E C O M P U T E R I S N O T R E S P O N D I N G - See "Diagnostic Lights" on page 105. I F T H E P O W E R L I G H T I S B L I N K I N G G R E E N - The computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to resume normal operation. I F T H E P O W E R L I G H T I S O F F - The computer is either turned off or is not receiving power. • Reseat the power cable in the power connector on the back of the computer and the electrical outlet. • Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly. • Ensure that any power strips being used are plugged into an electrical outlet and are turned on. • Ensure that the electrical outlet is working by testing it with another device, such as a lamp. • Ensure that the main power cable and front panel cable are securely connected to the system board (see "System Board Components" on page 27). I F T H E P O W E R L I G H T I S B L I N K I N G A M B E R - The computer is receiving electrical power, but an internal power problem may exist. 100 Troubleshooting