HP EliteDesk 800 Maintenance and Service Guide - HP EliteDesk 800 G1 Tower, HP - Page 235

Power LED flashes Red six times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Graphics card (some models) is not seated properly or is bad, For systems with a graphics card: or system board is bad. 1. Reseat the graphics card. Power on the system. 2. Replace the graphics card. 3. Replace the system board. For systems with integrated graphics, replace the system board. Power LED flashes Red ten times, once every second, followed by a two second pause, and the computer beeps ten times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Bad option card. 1. Check each option card by removing the cards one at time (if multiple cards), then power on the system to see if fault goes away. 2. Once bad card is identified, remove and replace bad option card. 3. Replace the system board. Solving Network Problems Some common causes and solutions for network problems are listed in the following table. These guidelines do not discuss the process of debugging the network cabling. Table 9-2 Solving Network Problems Wake-on-LAN feature is not functioning. Cause S5 Maximum Power Saving feature is enabled. Solution Disable the S5 Maximum Power Saving option in Computer Setup. Select Power > Hardware Power Management > S5 Maximum Power Savings. Solving Network Problems 223