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hp lj M4555mfp tray 2 issues

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Post time: 2015-7-5 18:20:20 |Show all posts
This machine will show when coming out of sleep mode (intermittently)
Tray 2 open, or empty.
Open and close tray 2 then shows
Tray 2 lifting.........and eventually Tray 2 overfilled.
Have replaced tray 2 paper feed unit, Tray 2 lift motor, DC controller,
Formatter, and HDD (from advice from HP).
And, of course, the firmware is up to date.
Also, I replaced the cable from the DC controller to the sockets on the rear of the paper feed unit.
Still doing this.
Any ideas are welcome.
I realize that the Tray 2 open may signify the size detect switches are not working properly, but all three have to fail to detect Tray 2 is open.
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