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HP Recommended
HP DesignJet T520 24-in Printer
Microsoft Windows 10 (64-bit)

My HP Designjet T520 screen is blue and displaying B3C49878, what does this mean?

1 REPLY 1
HP Recommended

Either the main board or the USB stick installed on it are defective. Failure of the stick is pretty common and inexpensive to replace. Part number CQ890-67105

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