• ×
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
  • ×
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
Guidelines
From questions to kudos — grow your reputation as a tech expert with HP Support! Click here to sign up.
Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.

‎02-25-2017 04:43 AM

HP Recommended
Product: Z800 Workstation

I have 2 z800 machines. One is non-functioning and has a MB issue and I ordered a new board from eBay for it, the other machine is working fine. The working one has 2 CPUs and CPU fans. The fans are not as quiet as I would like (though not bad for such a powerful box) so I thought I would try out the recently purchased official HP z800 liquid cooling unit that I had lying around. It was meant to be used with the non-functioning machine.
 
I installed the liquid cooling unit using the directions described here,
http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c01829154
 
Plugged everything in and turned the machine on. The fans (except RAM fans) started quietly, but no boot into bios. Then about 10-15 seconds later the fans started going very hard (RAM fans never ran). The machine would not boot.
 
So I took the liquid cooling unit out and put back the old fans. Rebooted the box and everything was back to normal.
 
So the question is what are the issues to look at when the liquid cooling unit cause a failure to boot?

2 REPLIES 2

‎02-25-2017 11:22 AM - last edited on ‎03-16-2017 04:14 PM by HP Administrator

HP Recommended

Hi,

 

 

Please post the HP product number for your PC. How to Find the HP Model Number and the HP Product Number or let HP automatically find your PC model number and HP network attached printers. This will allow others to review your issue, make suggestions and review your responses. This is usually the best way to get assistance.

 

 

 

It might be that the water pumps are not working.  Do you see any power button flashing or beeps when the PC shuts down?

HP ENVY 6055, >Custom PC - Z690, i9-12900K, 32GB DDR5 5600, quad NVMe drives 4K screen, NVIDIA 3080 10GB

‎02-28-2017 07:21 AM

HP Recommended

There are no flashing lights or beeps, just the fans start (ecept RAM) and no bios screen. I emailed the eBay vendor that sold me the new unti and they will take it back but they asked me to try again since they feel I the unti should be working. Only thing I can think of is that I may have made an error in the wiring. I followed the instructions provided by HP.  However, the photos of the wiring were not has detailed as could be.  Are these the instructions you used,

 


http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c01829154

 

I will try again this weekend when I get a motherboard to setup a second z800 machine. I cannot risk messing up my working machine since it is needed for my work.

Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation.
Didn't find what you were looking for? Ask the community
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.