HP Dx5150 HP Business Desktop dx5150 Series Service Reference Guide, 1st Editi - Page 143
Diagnostic Front Panel LEDs and Audible Codes - video
UPC - 882780485433
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POST Error Messages Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes three times, once every second, followed by a two-second pause. The Power LED will continue flashing until the problem is resolved. None Processor not installed (not an indicator of bad processor). 1. Check to see that the processor is present. 2. Reseat the processor. Red Power LED flashes four times, once every second, followed by a two-second pause. The Power LED will continue flashing until the problem is resolved. None Power failure (power supply overloaded). 1. Open the hood and ensure the 4-wire power supply cable is seated into the connector on the system board. 2. Check if a device is causing the problem by removing ALL attached devices (such as hard, diskette, or optical drives, and expansion cards). 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 times, once every second, followed by a two-second pause, and the computer beeps five times. Beeps stop after five times but the Power LED will continue flashing until the problem is resolved. 5 Pre-video 1. Reseat DIMMs. Power on the memory error. system. 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. Service Reference Guide, dx5150 361685-001 C-5