HP dx2480 Hardware Reference Guide: HP Compaq dx2480 Business Desktop MIcrotow - Page 78

Troubleshooting Problem Computer will not start. Cause Wrong memory modules were used in the upgrade or memory modules were installed in the wrong location. Solution 1. Review the documentation that came with the system to determine if you are using the correct memory modules and to verify the proper installation. 2. Observe the beeps and LED lights on the front of the computer. See "Interpreting Diagnostic Lights and Audible Codes" to determine possible causes. 3. If you still cannot resolve the issue, contact Customer Support. Interpreting Diagnostic Lights and Audible Codes This section covers the front panel LED codes as well as the audible codes that may occur before or during POST that do not necessarily have an error code or text message associated with them. If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the computer and refer to the following table to determine the front panel LED codes. Recommended actions in the following table are listed in the order in which they should be performed. Replace the system board or power supply only as the last resort. !! ! ! Troubleshooting Guide www.hp.com/in 8-17