• ×
    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
Are you having HotKey issues? Click here for tips and tricks.
Locked

‎01-26-2020 06:23 AM

HP Recommended
Product: HP Z640 workstation
Operating System: Microsoft Windows 10 (64-bit)

My Hp Z640 workstion won't turn on when I have attached the Power supply with the motherboard the fan of the PSU is stopped spinning and no power in the board I have changed the motherboard but same problem I can not identify the which one is fault  the PSU or the motherboard .Plzzzzz help me

4 REPLIES 4

‎01-26-2020 05:27 PM

HP Recommended

Download the HP technical and service manual for the Z440/Z640/Z840.... easy to find via google.  Look in there for "BIST" and power supply section.  BIST = Built In Self Test, for the power supply.

 

Used power supplies for these have come down in price quite a lot..... new via HP is wonderful if your company is paying for it.  Power supplies do rarely go bad with these symptoms, and used ones even more rarely are bad when they arrive (never for me, and never for anyone I know).  They are much easier to swap in than a motherboard.  I'd buy one as your next step to test with.

Was this reply helpful? Yes No

‎01-26-2020 10:35 PM

HP Recommended

actually I have replaced the motherboard with a new motherboard but same happens thats the reason I have dought on the PSU

Is there any method to check the PSU ???

Was this reply helpful? Yes No

‎01-27-2020 07:56 AM

HP Recommended

Spoon Feeding.jpg

Was this reply helpful? Yes No

‎01-29-2020 03:56 AM

HP Recommended

is there any engineer of HP only 

engineer can solve my problem

Was this reply helpful? Yes No
Warning
Be alert for scammers posting fake support phone numbers and/or email addresses on the community.
If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† 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>.