This document is for HP Laser MFP 131a, 133pn, 135a, 135ag, 135r, 135w, 135wg, 136a, 136nw, 136w, 137fnw, 137fwg, 138fnw, 138p, 138pn, 138pnw, 1136w, 1139a, 1188a, 1188w, 1188nw, and 1188pnw printers.
Learn how to properly load paper or envelopes into the input tray.