HP t628 t628 Thin Client - Page 55
Diagnostic front panel LEDs and audible codes continued, Table B-3
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Table B-3 Diagnostic front panel LEDs and audible codes (continued) Activity Beeps Possible Cause Recommended Action 3. Replace third-party memory with HP memory. 4. Replace the system board. Red Power LED flashes six times, 6 once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Pre-video graphics error. For systems with a graphics card: 1. Reseat the graphics card. 2. Replace the graphics card. 3. Replace the system board. For systems with integrated graphics, replace the system board. Red Power LED flashes eight 8 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Invalid ROM based on bad checksum. 1. Reflash the system ROM with the latest BIOS image using the BIOS Recovery procedure. 2. Replace the system board. System does not power on and LEDs are not flashing. None System unable to power on. Press and hold the power button for less than four seconds. If the hard drive LED turns white, the power button is working correctly. Try the following: 1. Remove the power cord from the computer. 2. Open the computer and press the yellow CMOS button on the system board for four seconds (located near the front USB ports). 3. Verify that the AC cord is plugged into the power supply. 4. Close the unit and reattach the power cord. 5. Try to power on the computer. 6. Replace the unit. Interpreting POST diagnostic front panel LEDs and audible codes 49