Compaq Pro 6300 Maintenance & Service Guide Elite 8300 Touch All-in-One Bu - Page 195

Table 10-2 Diagnostic front panel LEDs and audible codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes four 4 Power failure (power 1. Open the hood and ensure the 4 or 6-wire times, once every second, supply is overloaded). power supply cable is seated into the followed by a two second connector on the system board. pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. 2. Check if a device is causing the problem by removing ALL attached devices. Power on the system. If the system enters the POST, then power off and replace one device at a time and repeat this procedure until failure occurs. Replace the device that is causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 3. Replace the power supply. 4. Replace the system board. Red Power LED flashes five 5 Pre-video memory error. CAUTION: To avoid damage to the DIMMs or times, once every second, the system board, you must unplug the computer followed by a two second power cord before attempting to reseat, install, or pause. Beeps stop after fifth remove a DIMM module. iteration but LEDs continue until problem is solved. 1. Reseat DIMMs. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Red Power LED flashes six 6 Pre-video graphics error. For systems with a graphics card: times, once every second, followed by a two second 1. Reseat the graphics card. pause. Beeps stop after fifth iteration but LEDs continue until 2. Replace the graphics card. problem is solved. 3. Replace the system board. For systems with integrated graphics, replace the system board. Red Power LED flashes seven 7 System board failure Replace the system board. times, once every second, (ROM detected failure followed by a two second prior to video). pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Red Power LED flashes eight 8 Invalid ROM based on 1. Reflash the system ROM with the latest BIOS times, once every second, bad checksum. image. See the "Boot Block Emergency followed by a two second Recovery Mode" section of the Desktop pause. Beeps stop after fifth Management Guide for more information. iteration but LEDs continue until problem is solved. 2. Replace the system board. Interpreting POST diagnostic front panel LEDs 185