Larry Pina (born November 12, 1947) is an author of five do-it-yourself repair manuals for Apple Macintosh computers and peripherals. Pina authored the Mac shareware utility Test Pattern Generator (TPG) which allowed users to test and measure various video screen characteristics via test patterns. Among other circumstances, Mac users could use the TPG utility after performing hardware upgrades to check if the screen alignment needed adjusting. According to several of the books, Pina was living in Westport, Massachusetts when they were published. Books Macintosh Repair & Upgrade Secrets (1990, Hayden Books) Macintosh Printer Secrets (1990, Hayden Books) Macintosh II Repair and Upgrade Secrets (1991, Brady Publishing) The Dead Mac Scrolls (1992, Goldstein & Blair) Mac Classic and SE Repair and Upgrade Secrets (1993, Peachpit Press) References External links Larry Pina page at jagshouse.com Pina's books being used as references in a Mac SE/30 repair guide American non-fiction writers 1947 births Living people