Important - The CLJ5FR feature is for the Color LaserJet 5/5M only. It will not work on the original HP Color LaserJet. If you have the HP Color LaserJet 5/5M please read the note below: Please Note: You do not need to upgrade your formatter board unless you will be using the CLJ5FR feature. (See driver list below) In order to use the CLJ5FR feature you must have the following: Your printer datecode must be version B.01.12 (960223) or above. To determine your firmware version, run a self-test page or look for the B sticker under your toner lid. Your PC must be 486/66 or above.