Irwin Marine Tech Tips - My Simrad Screens Are Black / Won't Turn On Irwin Marine Tech Tips features a series of frequently asked questions from our customers regarding various topics on their boats. This video highlights how to operate your Simrad Screens, what to do if your screens appear dark or black, how to turn your screens on or off, and more. Call 603-524-6661 for more information or visit us online at www.IrwinMarine.com