Boot Block Recovery and processor

[Airborne9521]

Hi,

       I guess I did the partial CMOS clear (with the button). I tried to find something on doing a FULL CMOS CLEAR but could not find anything. Could explain?

 Thanks.

[DGroves]

note: make sure any other jumpers you may have played with are returned to the default position

before doing a cmos reset

--------------------------------------------------------------------------------------------------------

remove pwr cord, press power button for 15 sec then remove side panel

remove cmos batt (note orientation for proper replacement)

press cmos clear button for 5 sec

no do steps in reverse, and try powering on system 

[Airborne9521]

Hi,

       OK, I went through the FULL CMOS RESET. This is a bit better as the monitor is getting a video signal but no BIOS message appears. So I guess I had to go through the Boot Block Recovery routine. When I get the 8 beeps with flashing red LED and fans at full speed, the light on the USB thumb drive flashes slowly than fast and slowly again. I left it there for an hour but no change. Any ideas?

 Thanks.

[DGroves]

last time, the z840 REQUIRES the bios file to be in a specific folder read "SDH'S" posts on this.........i will not repeat myself again on this subject

[Airborne9521]

OK, I guess I’m reading the right document. Could you give me a link to it?

Greatly appreciate your help.

[Airborne9521]

Meant the NOT the right document.

[DGroves]

Edit: currently as of 6/2/2021 the HP "Z"x40 series bios (sp114032.exe)v2.57  is unavailable for download from HP

google is your friend,....................... if you don't know how to use this forums "search" then say so

https://support.hp.com/us-en/document/c05163478

and from the service manual...............................

BIOS crisis recovery tool (for the z840 the 2017 file is the one you want, "FULLY" read the included docs)
HP provides a BIOS crisis recovery tool through the HP PC Hardware Diagnostics 3-in-1 USB key. This tool can
be used by HP authorized service providers to recover systems that have failed due to a corrupted BIOS. For
more information about using the 3-in-1 USB key for BIOS crisis recovery, go to http://www.hp.com/go/
techcenter/pcdiags. Additional information is included in the web-based training oƫered by HP University. See
the modules that cover HP PC Hardware Diagnostics (UEFI).

it would appear that you are not actually reading the FULL chapters on troubleshooting please do so

[Airborne9521]

Hi,

        thanks for the information, I really appreciate your help. As for the manual, see we talking about the Maintenance and service guide?

 Thanks.

[Airborne9521]

Hi,

        I followed the instructions, created the USB key, use the utility to copy the Bios file in the right folder. The instructions said to turn on the computer and the key would be read but that is not the case. So I booted in Bios boot recovery mode with the key inserted, got the 8 beeps and flashing red LED. The key is being read for a couple of minutes. After that the fans go full speed, the system stop reading the key and beeping 8 times with flashing LED again and again. Did I miss something?

 Thanks.

[Airborne9521]

Forgot to mention that the BIOS version I’m using is 2.20, the last version that was installed was more recent. I don’t know if that matter.