Z4 G4 Workstation Failed to Boot

[Prasetyo_Uji]

Hi, 

My Z4 is failed to boot up, cause Bios Updated, My Bios version is P61 01.61, and where i should download BIOS with that version ?

[BeemerBiker]

 First try a hard reset

On a desktop system, unplug computer.
Press the power button 2-3 times to discharge residual electricity.

Plug back in then ---

• Turn on the computer by holding the power button down for 20 full seconds then release.
• Press the Power button one more time (if necessary) to start the computer.

then try the WIN-B restore

HP support video for bios recovery

Click here to see how to recover your BIOS.
Do 1, 2, and the first part of 3.
For the second part of 3 you will need a USB flash drive and possibly an
older BIOS if the recent BIOS caused the problem. Make sure the USB flash had LED lights.


To install from USB.
When you power up your system the LEDs on the flash drive should flash once at the instant power is applied. They will then flash about three to five seconds later (hopefully). When they flash a second time that means the files are being read from the flash drive. If you never see it flash a second time then the boot loader is damaged and you cannot recover the bios unless you use a programming tool or replace the chip. You hold down the Windows key + B key when powering up with the USB flash inserted.

----older bios----

If you have a Xeon CPU then pick one of these BIOSs for the flash

https://support.hp.com/us-en/drivers/swdetails/hp-z4-g4-workstation/16449890/swItemId/vc-331711-1

if you have the "X" type CPU then one of these

https://support.hp.com/us-en/drivers/swdetails/hp-z4-g4-workstation/16449890/swItemId/vc-331864-1

[Prasetyo_Uji]

Hi, thank for reply this message

My BIOS version is P61 01.61 before upgrade to newer version, I think my RAM is problem cause non ECC, is that possible to downgrade or downloaded P61 01.61 BIOS version on archive HP ?

[BeemerBiker · Accepted solution]

If you have a memory problem remove all the chips then put one of them back in and see the system boots.

I am guessing the bios update went bad.  Did you try the Win-B restore procedure in the video?

I was unable to find a  P61 bios here at HP. There is a 3rd party site that might have P61

https://vinafix.com/threads/hp-z4-g4-core-x-workstation.42671/