Murphydun

Display screen is glitchy but I can use all the controls but can’t use the screen .

gamma300C

These liquid crystal screens have very fine gauge power wires that fail after several years or the screen display itself stops working. . This smaller, non NAV screen is much easier to find on line, Amazon, eBay, AliBaba and YouTube full of DIY instructions. See those 2 rubber rectangular bumpers..pop them out and insert a hooked piece of wire, yank and the unit will come out. Not too bad a procedure..I've done it twice without problems.