HP LaserJet 4 Service Manual - Page 244

Table 7-4 "MP/PC/LC (Tray 1/2/3) LOAD" Message Checks Checks Action Is media present in the tray(s). Install media. Are the proper trays fully inserted in the printer? Reseat the cassettes. Make sure each cassette is fully seated into the printer. Ensure that the Universal Paper tray selector knob setting matches the installed paper. Does the Control Panel's or application's Correct the setting to match tray. Paper size setting match the tray being used? Is the expected tray size being recognized by the printer? Ensure that the image is sized correctly (formatted) for the paper size selected. Proceed to the following cassette size switches functional check. Check switches 603/4/5 if feeding from the PC tray (Tray 1). Check switches 851/2/3 if feeding from the Lower Cassette. see Figures 7-14 and 7-15 for locations.) Are any of the tray identifier tabs broken Inspect the tray for damage. If damaged, on either PC (Tray 1) or LC (Tray 2) replace the tray. paper tray? 7-14 Troubleshooting