There are different blinking light sequences that indicate what the issue is. For example, it can blink 3 times quickly, and then twice slowly which indicates 

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Z820 - button Power LED blinks 4 times (red) with beep bad card (Quadro 4000) graphics? · 1. open the access panel and make sure that the power cable is 

The red LED blinks to represent the major error category (long blinks). The white LED blinks to represent the minor error category (short blinks) 

If you have a HP business desktop PC and the machine beeps 4 times, red led, then there is a power supply issue of some kind, or a motherboard issue. Go to your PC's support page, manuals section, read the troubleshooting guide for the list of beep codes and recommended troubleshooting steps. Was this reply helpful? Yes No

Apr 30th, at 12:03 PM. The HP site indicates a power fault. "Open the hood and ensure the 4 or 6-wire power supply cable is seated into the connector on the system board. 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.

Number of 1-second blinks (red LED) Diagnosis - followed by a 2 secondpause/ repeat: · 2 = Processor Thermal Protection Activated · 3 = Processor not installed · 4 

The red light blinks four times, and then two, short white light blinks (4 long red, 2 short white) This condition indicates that the processor (CPU) might be overheating. Confirm that the

HP desktop beeps 5 times red light? Definitely it is a RAM issue. Computer beeps 5 times when the system cannot read the RAM. So, remove the memory and 

7/12 · When I turn the computer on, it beeps 5 times and blinks a red light. I've read that it was a RAM problem. I recently have been trying to build a new computer, so I put the ram from my compaq into the new computer, which didn't want to work. So I put the ram back into my Compaq Pro so I could use it

Best answer: The Diagnostic LED blinks red 4 times (once per second): This indicates power failure. To resolve the issue, complete the following steps: