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‎11-23-2017 10:29 AM

HP Recommended
Product: LaserJet Enterprise M604
Operating System: Microsoft Windows 7 (64-bit)

Printer displays 33.05.05 Security Alert error.  Tried updating firmware from USB flash drive - printer shows progress bar for transferring file, which appears to go OK, but then at the end of the transfer it fails with "Unknown error".  Any ideas would be most welcome.  Cheers!

2 REPLIES 2

‎11-24-2017 06:30 AM

HP Recommended

Did you format the disk? If not that is the first thing I would do. You could also try a partial clean and see if it boots without the error and then try the upgrade.

‎11-24-2017 06:47 AM

HP Recommended

Hi @JohnR62,

 

Failing what davidzuts said to you before, try an "Erase Unlock" or "Secure Erase" and then put the new firmware.

 

I hope this helps,

 

Cheers!



ALEX-TATS
Printer Engineer for a HP Platinum Partner
I am not a HP employee
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