Can't update my firmware hp officejet pro 8600 plus to have the new certificates

[sbaloo]

Hi

i have a firmware in version CKP5CN1829AR and i can't update it.

I've got the sofware OJP8600_N911g-n_2011A

it says not applicable

even if i connect to usb it says not applicable.

Even if i find the device update and change in enterpriseDU.ini VerifyDownloadID=0

it says

failure to update, please swith off and on the printer and retry.

After doing this it doesn't succeed. How to have a contact with a hp ingenior to resolve this issue create by your change

For now i cannot use eprint and other connected stuff of my printer.

[KrazyToad]

@sbaloo

Welcome to HP Support Community

I would request you to contact HP Support in your region for further assistance

1) Click on this link - www.hp.com/contacthp/ 
2) Select your product type below.
3) Enter the serial of your device. 
4) Select the country from the drop-down. 
5) Select the chat or get phone number options based on your preferences. 
6) Fill the web-form and proceed further.

Thank you

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