= AST RESEARCH, INC. TECHNICAL BULLETIN # 1119 4-5-95 = POWEREXEC KEYBOARD PROBLEM PROBLEM The PowerExec system's keyboard may experience the following two problems: 1. The keys may get "stiffer" and harder to use over time. 2. The keyboard is subject to non-working keys. CAUSE Friction between keys makes it difficult to type. This friction is caused by environmental dirt. There is not a problem in the design. SYSTEMS AFFECTED AST PART NUMBER AND DESCRIPTION 500936-XXX POWEREXEC 386SL25 MONO 500937-XXX POWEREXEC 386SL25 PASSIVE COLOR 501114-XXX POWEREXEC 386SL25 COLORPLUS/8 501165-XXX POWEREXEC 386SL25 COLORPLUS/9 501164-XXX POWEREXEC 386EL25 MONO 501186-XXX POWEREXEC 386EL25 PASSIVE COLOR 501138-XXX POWEREXEC 486SL25 MONO 501139-XXX POWEREXEC 486SL25 PASSIVE COLOR 501115-XXX POWEREXEC 486SL25 COLORPLUS/9 501191-XXX POWEREXEC 486SL33 MONO/9 501192-XXX POWEREXEC 486SL33 COLORPLUS/9 SOLUTION AST recommends cleaning the keyboard either by vacuuming it or by dusting it with compressed air. If the problem persists, contact your local AST Authorized Service Center.