Z820 - button Power LED blinks 4 times (red) with beep... bad card (Quadro 4000) graphics?

Hello

My Z820 at the office is suddenly having a few hardware malfunction.

When I turn on my machine, the PSU/system fans don't rev and the Power LED button flashes red with a beep 4 times.

According to this page of troubleshooting, this indicates a faulty PSU on the new UEFI computers:

HP desktop - computer does not start and emits a LED or a beep Code

Section "code beep and LED descriptions.

Get the exact model of LED as the example of "power failure".

Then, I got a new power supply replacement. I still have the exact same model LED and beeps...

So, I have drawn deeper and found that when I removed the Quadro 4000 card graphics and then put on my machine, the power button LED is lit in blue (led code ' computer-S0 (normal operation) "") and all the normal spin fans.

The Quadro card seems to be the culprit...

Unfortunately, I have no alternative graphic card laying to verify this around, I'm waiting for a replacement of the graphics card (via HP service) to arrive tomorrow.

Is it possible that the power LED button code (4 times red with beep...) has nothing to do with a bad power supply and that my Quadro is bad?

Dries

Dry... that Z820 has been giving you headaches.

Many fault codes have not changed since the previous workstatons.  I hit this series of beeps of error in the past, and often doesn't mean that the power supply itself is the cause.  It can be a hardware device to the bottom of the chain causing a power surge to power, triggering his "crowbar circuit: fault protection

http://en.Wikipedia.org/wiki/crowbar _ (circuit)

Here are the instructions to deal with this series of beeps of a previous HP xw technical and repair.  Note the number 2 in the troubleshooting instructions... usually you don't have to go down to 3, in my experience.  I think that you have already found the faulty unit:

Loss of power.
1. open the access panel and make sure that the power cable is properly
connected to the system board.
2. Locate the faulty device by removing all devices and then reinstalling one at a time
until the workstation fails. Replace the device at the origin of the failure. Continue to add
devices to make sure that everything works correctly.
3. check the power supply feature.
a. turn off the AC power.
b. remove all cables internal power on the system board.
c. connect the power supply.
● If the power supply fan turns and the BIST LED lights, then the
power supply is good. Replace the motherboard.
● If the power supply fan does not turn or the BIST LED does not
light up, replace the power supply.

Tags: HP Desktops

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