You are now ready to clean the underside of the glass.
Use only glass cleaner. Avoid abrasives, acetone, benzene, and carbon tetrachloride, all of which can damage the scanner glass. Avoid isopropyl alcohol because it can leave streaks on the glass.
Do not spray the glass cleaner directly on the glass. Do not allow the cleaner to seep between the glass and the plastic. If liquid gets between the glass and the plastic it could stain the calibration strip ( the white strip under the glass) and render your scanner useless. If the cleaner gets in the calibration strip area, the scanner must be sent to hp for repair.
10Apply glass cleaner sparingly to a soft,
When you have finished cleaning the underside of the glass, reassemble the top cover.
11Hold the top cover directly above the scanner and slide the front of the top cover into bezel first and then lower the back into place.
top cover being installed onto base