Main PCA to OMAS Controller cable is not connected
Last updated: February 22, 2026
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20180508 185800
hp designjet t 790 new formatter board and hard disk replaced but it does not boot error 08:11.
Main PCA to OMAS Controller cable is not connected
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Check that the Main PCA to OMAS Controller cable, Check that the Main PCA to OMAS Controller cable is connected to the Main PCA and the OMAS Controller Card.
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A flexible flat cable that connects the carriage assembly to the main PCA, transmitting data and power signals to the printheads as the carriage moves.
The main logic board inside an HP DesignJet printer that controls all operations, including processing print jobs, managing ink delivery, and communicating with connected devices.
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