One thing to keep in mind, when trying to determine if the Sleep Timer is working properly, is if you have it set for 25 minutes, if at any time during that 25 minutes, you press any key, that will reset the timer. So, if you press 1 to go back a sentence, for example, that will reset the timer. That is easily done, without thinking. Pamela Rader, TECHNICAL SUPPORT American Printing House For The Blind 1839 Frankfort Ave. Louisville, KY 40206 PHONE: 1-800-223-1839, Ext. 307 >>> doryfish@xxxxxxxxxxx 09/15/05 10:33AM >>> The sleep time mode worked fine until we switched it from 30 minutes to zero minutes. Even though we switched it back to 30 minutes and then later to 25 minutes, for the most part, the book port acts as if it is set at the zero level. It is not a big enough problem to warrant sending it back and being without it for a month. This happened even though the unit was reset. Dory doryfish@xxxxxxxxxxx