• ×
    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
Seize the moment! nominate yourself or a tech enthusiast you admire & join the HP Community Experts!
Archived This topic has been archived.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.

‎03-06-2019 12:21 AM

HP Recommended

I have a hp z400 workstation that turn on but gives me a black screen with no beeps, i tried to remove all rams but still no beeps but when i did removed the cpu it gives me 3 beeps that means no cpu installed.i did replace the cpu with other one but still have the same issue. So i suspect the psu or the mobo.
Btw i did replace the psu with a non compatible one and it gives 4 beeps that means a power failure.

I tried 3 different gpus but still the same.
So the mobo detect a bad psu and detect no cpu installed but why she didn't gives beeps when RAM is not installed.
So is it a bad mobo or a bad psu.
Sorry for my bad english and plz help me to solve this problem.
Specs 
HP z400
6gb of ram
475 watt psu
Quadro 2000
Xeon w3565

Archived This topic has been archived.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>.