Z820 not booting

[athomas1]

Hi everyone,

I have a HP Z820 Xeon Workstation, product # LJ452AV ...

At first, it would not boot and pressing the power button would cause the power LED to blink red two times, pause, blink red two times, pause, etc., etc. According to the service guide at http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03424977-1.pdf (page 149), this indicated a thermal issue, which I (possibly?) resolved by reseating the fan cables and fan assembly.

Immediately after reseating all that ... now, the PC looks like it turns on when I press the power button, and the power LED stays on with a solid blue light (no beeps). No video shows up on the screens though, and the keyboard doesn't work (caps lock light doesn't turn on or off when I press the key). After a minute or two left in this state, the internal fans rev's up to maximum speed.

What could be the issue here? A bad video card? systemboard? something else?

Thank you in advance.

[Esskay]

Hi,

You either have a faulty component (could be a memory module or graphics card), or one such components is not seated properly.

Try this:

1. Power off the system, and remove the main power cable.

2. Keep the power button depressed for 1-2 minutes.

3. Open the system, and reset the BIOS using the button switch on the motherboard (You can refer the side panel for the location) - Please note that this will cause all CMOS values to be reset.

4. Remove the memory modules, graphics card and reseat them.

5. Make sure all the fan assemblies are insatlled back properly.

6. Power on the system and see if you have video.

If the above doesn't work, remove components and start with the very basic ones like single or dual memory modules and just the graphics card. This will help you isolate the problem.

Also, if your system has only one CPU, you may want to ensure that the graphics card is installed in slot # 2 or slot # 6, which are assigned to the first CPU.

BTW, please post your system configuration when you update.

Thanks,

Sasi

[AML2]

Great suggestions Sasi.  Wouldn't hurt to check BIOS too.  

Z820 3.69A BIOS

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Although I am an HP employee, I am speaking for myself and not for HP.

[SalSimp]

If it is not fixed by now ...

What is the processor you have installed? From the discussion it sounds like you may have installed a repalcement.