When the OfficeJet combination fax machine and printer came out last year, I criticized Hewlett-Packard Co. for leaving out two things: the ability to fax documents without printing them out first and a way to scan printed material into your computer (BW--Nov. 7). The new OfficeJet LX fixes these shortcomings. And it adds the extra functions without complicating the setup process. The LX has a street price of around $800, about $100 more than the original OfficeJet, which remains on the market. Owners of older OfficeJets can buy an LX upgrade kit directly from HP for $119 (800 772-4329).