CPU not booting

[Mugen254]

Hi,
Just replaced my hp z820 with a new one that supports v2 processors. But when l try to run it with the e5 2696 v2 l got, it won't boot. All you get is the fans reving.
But when l boot it with the previous processor l had E5 2680, boots up like a charm.
What could be the problem. Please assist.

 

[Seanie280672]

Hi,
Just replaced my hp z820 with a new one that supports v2 processors. But when l try to run it with the e5 2696 v2 l got, it won't boot. All you get is the fans reving.
But when l boot it with the previous processor l had E5 2680, boots up like a charm.
What could be the problem. Please assist.

Loads of info on your issue here, and many others having the same problem: https://h30434.www3.hp.com/t5/Business-PCs-Workstations-and-Point-of-Sale-Systems/z820-e5-2600-v2-ivy-bridge-upgrade/td-p/5086052

From what I can see, you need to update your bios to v3.05 to support that CPU, however, people are reporting that even after updating, the boot block required to post on that CPU didnt get updated, one guy has mentioned, that in order to update the boot block during the bios update:

Jumper settings for updating boot block:
put a jumper on E14 & put a jumper on E1 (pin 1 & pin2)
- make sure to remove E14 after bios update.
- make sure to put E1 jumper back to previous pins (pin2 & pin3) after update.