Lexmark 4227-X00 - Manual (Page 70)

Repair Information 4-7
4227-X00
7. Place the printer on its left side. Insert a flat blade screwdriver
into the two slots [4] and release the cover by prying down on
the left side latches and up on the top cover.
8. Place the printer on its right side and release the two right side
latches.
9. Place the printer on its feet and release the remaining two top
cover latches.
10. While lifting the top cover slightly, disconnect the operator panel
cable from the main logic board and then remove the top cover.
Reinstallation:
Be sure that the operator panel cable is correctly aligned and
inserted securely.
WARNING: Damage to the operator panel cable may cause failure
of other electrical components of the printer. Be sure not to crimp or
pinch this cable while reinstalling the top cover.
CAUTION: Be sure to unplug the power cord whenever you are
working on the printer with one of the covers removed.