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HP 6940 error "Unable to establish two way communication"
I have two possibly related problems. With an XP operating system and HP 6940 deskjet printer, I continue to receive the above error message every time I try to look at ink levels (not a big deal in itself). The problem appears to be related to one computer since swapping printers, cables, and...- thebarkingdog
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- Replies: 5
- Forum: Printers General Discussion
