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‎09-08-2026 01:55 PM

HP Recommended
Operating System: Microsoft Windows 11

Hello, our HP Designjet T120 suddenly has a blue screen with B34F0068 at startup. It does not proceed to do anything beyond showing this code. I have researched and can't find much on this code. Does anyone have any ideas what the problem might be?

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‎09-09-2026 03:00 PM - edited ‎09-09-2026 03:01 PM

HP Recommended

Hi @DeeDee321 

 

Welcome to the HP Support Community.

 

Thank you for posting your query.

 

The Blue Screen error code B34F0068 on the HP DesignJet T120 could be a firmware authentication failure caused by a faulty encrypted chip on the printer’s mainboard. To isolate the issue and share the accurate steps I would request you to please share me the error displayed.

 

Take care and have an amazing day!

I'm an HP Employee.


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‎09-11-2026 03:11 PM

HP Recommended

In most cases this is caused by a failed firmware stick which sits on the formatter board. It is currently listed as obsolete so HP does not stock it but you can try sites like Ebay for sellers that have remaining stock. It might be a bad formatter but in most cases it is the part listed below.


Part you need is CQ890-67105

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