Compaq Pro 6305 Maintenance and Service Guide Pro 6305 Microtower Business PC - Page 205
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes
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Table 10-1 Numeric Codes and Text Messages (continued) Control panel message Description 2240-ME image unlock failure Special system configurations with reduced ME firmware image require BIOS control of ME firmware upgrading. A failure has occurred prior to the ME firmware update process in which the BIOS could not unlock the ME firmware region. Invalid Electronic Serial Number Electronic serial number is missing. Network Server Mode Active and No Keyboard Attached Keyboard failure while Network Server Mode enabled. Parity Check 2 Parity RAM failure. Recommended action 1. Reboot the computer. 2. If the error persists, update to the latest BIOS version and ME firmware version. 3. If the error still persists, replace the system board. Enter the correct serial number in Computer Setup. 1. Reconnect keyboard with computer turned off. 2. Check connector for bent or missing pins. 3. Ensure that none of the keys are depressed. 4. Replace keyboard. Run Computer Setup and Diagnostic utilities. Interpreting POST Diagnostic Front Panel LEDs 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. WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system components to cool before touching. NOTE: 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. Not all diagnostic lights and audible codes are available on all models. Table 10-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. None Computer on. None Green Power LED flashes every None two seconds. Computer in Suspend to RAM mode (some models only) or normal Suspend mode. None required. Press any key or move the mouse to wake the computer. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 195