HP Z800 No post

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Kloper
    Member
    • Feb 2022
    • 10
    • Austria
    #1

    HP Z800 No post

    I have a HP Z800 with dual Xeon CPUs that turns on, but does nothing after that. Removing the GPU and RAM gives no error code.. the only error I get is 3x beep when I remove the CPUs. I probed the bios with an oscilloscope and there is no activity at all, it basically gets never accessed.

    Voltages seem to be all present, I dont see any shots on the board or anything visually that show some issue.

    The workstation seem to have works fine till one day it just started with black screen and thats the situation I have at the moment.

    I did reflash the bios just to rule that out.. but nothing.

    I am honestly unsure what to test here... or how to identify issue?
    My best guess would be that the PCH is dead...?

    Any suggestions on what I could check is very welcome!!

    Thanks!

    ps: I will attack an image of the board.. its just an reference from the internet, but looks exactly the same.
    Attached Files
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • Document Archive
      HP Z800 E5645 Specification for Upgrade or Repair
      by Document Archive
      This specification for the HP Z800 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Z800 boardview and Z800 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for HP Z800 is accurate, safe, error...
      09-12-2024, 03:36 PM
    • Document Archive
      HP Z800 E5530 Specification for Upgrade or Repair
      by Document Archive
      This specification for the HP Z800 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Z800 boardview and Z800 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for HP Z800 is accurate, safe, error...
      09-12-2024, 03:30 PM
    • ugamazing
      Procedural question about BGA rework and removal of CPUs
      by ugamazing
      I have been working to develop a consistent and reliable method/workflow for removing, re-balling, and replacing CPUs on various MacBook Pro models (2015-2020).

      I have done OK so far, but there's one detail I need to sort out. I'm hoping someone much more experienced than myself may be able to shed some light:

      I am noticing the pulled CPUs (to be re-balled) come off fine, and they "look" fine as well, immediately when I pull them. However, within a few minutes, after cooling, the CPU chips develop a very, very slight curve/bend. It's SO SLIGHT, maybe a 1-2%...
      07-12-2022, 03:11 PM
    • Nebukadnerzar_V
      Dell Optiplex 760 USFF BIOS Mod Request for QuadCore CPUs
      by Nebukadnerzar_V
      Hi guys!
      I have a Dell Optiplex 760 USFF (Ultra-Small Form-Factor).
      It currently only supports Dual-Core CPUs and will halt with an error message, when a QuadCore is installed.

      I have seen people running QuadCores in these machines, but the BIOS needs to be modded.
      Since I have not found the modded BIOS to download anywhere, I am asking you guys for help:

      Could you please add support for QuadCore CPUs (in my case the Core2Quad Q9550) to the BIOS?

      I have attached the Dump of my machine.

      S/N: SRW2K4J
      Reg Model: DCTR...
      09-27-2024, 02:43 AM
    • kbjunkie
      HP Z800 Workstation - Schematics or help identifying capacitor / component value
      by kbjunkie
      Hi all,

      My first post here for help - and I'm hoping someone here can help me..

      My Z800 dual Xeon workstation has stopped posting. Just high fan spin on power up. I did a little digging about and found some electrolytic caps that were bulging and had leaked onto the board. I've replaced those and then discovered the remnants of what looked like another cap (SMD) had disintegrated on the board in the same part of the circuit. It looked like a cap but I have no way of knowing for sure, or what value it may have been as there was nothing left of it.

      I...
      09-04-2023, 07:06 AM
    • Loading...
    • No more items.
    Working...