HP Z800 BIOS problem

[Mitryakhin]

HP Z800 BIOS problem don't see the video cards this happened after turning off Video Option ROMS in BIOS when turned on, it emits 6 beeps and with a red LED on the power button

[DGroves]

if all you did was disable the video card rom then a simple cmos reset will restore the bios back to defaults

remove power cord, remove side panel, press cmos reset button (located near cmos coin cell batt) for 5 sec and attach power cord and boot, then enter bios and set time/date and disable "AMT" boot from network Nic(s), and disable LSI Bios Rom (do not disable LSI device) if your current boot drive is on the LSI ports move it to one of the two grey sata 6GBps ports 

if on the other hand you  changed the compute option on all motherboard slots (pcie and pci) your screwed unless you can blind type the necessary commands to undo it (not likely)

[Mitryakhin]

Once there was such a problem, the same 6 signals and did not turn on. I used a different slot and a different video card. The system started up, I managed to get into the BIOS and reset the default settings. A few days later, I again went into the BIOS settings and disabled something that I can’t remember exactly. Now I can say I tried everything, I ran it with 2 sticks of RAM and with one processor, Crisis recovery jumper also used it. computers just emit 6 beeps and more than one USB port does not work .. Now I have burned a disk with a BIOS update, but unfortunately the disk does not want to read

I want to apologize for the grammar, I write through a translator,

[DGroves]

STOP TRYING TO FLASH THE BIOS, this will only create MORE PROBLEMS by corrupting the working bios

if moving the video card to another slot does not work or .............................

if you have started the bios recovery process by moving the crisis recovery jumper, then the steps below will no longer work

as i said, if you enabled the "compute option" in the bios for all pcie slots, your screwed..... replace the board or the whole system if the below steps fail

the steps below are ONLY for changing the enabled pci-e slot compute setting back to disabled

 you must execute the bios keyboard sequence blind as the video is not working

remove the existing video card and power on

On power up, keep Pressing "quickly" the F10 key and wait a few seconds (10 sec or so)

for the SATA/SAS initialisation.

Press 4 times the right arrow key (this will position you on the Advanced menu)

Press 7 times the down arrow key (this will position you on the slot 2 (Pcie2 x16)

Press Enter (this will open the slot 2 (Pcie2 x16 option)

Press 1 time the down key (this will position you on the Slot 2 Compute option)

Press 1 time the right key (this will disable the compute setting if it's enabled)

Press F10 (this will close the Bios option windows)

Press F10 (this will position you on the Bios "Save changes and Exit") setting tab

Press Enter (and the  workstation will reboot).

After that you can plug a video card in the Slot 2 and it should have a working display

[SDH]

DG... Agree.

I recall an alternative solution to this from the past was to temporarily use a PCI video card (not a PCIe video card) to get video display back. I can dig into my stash to find that post and provide the specific nVidia PCI card the old post was recommending if you wish. I remember buying one of those to have in reserve in case I ever did that particular blunder, years ago.

If this is the same issue, then it is a great example of painting oneself way back into a corner...

[Mitryakhin]

I think you are right and this will help me, I was looking for such a board, but I could not find it yet. I will be grateful if you find an old topic... I see no reason to change the board, I will try other ideas...

[Mitryakhin]

Thank you for your help, I'll write back when I try your method

[SDH]

For others... your first reference to "board" is related to the video card.

Your second reference to "board" is related to getting a new used motherboard.

We respect the issues related to language differences. Wherever you are this will be maintained. Back to you shortly with the response.

[Mitryakhin]

I have 3 video cards available, the problem is not at all in the video card, the problem is that I disabled something by mistake and now at startup the computer swears that there is no video. I think a PCI video card will help me

[SDH]

Attached below are 3 PDFs related to this issue and the PCI (not PCIe) video card I tracked down and bought. 

Sometimes going back to older technology can get you out of a bind... once you can see video you can correct a BIOS issue.