Game booted and display worked fine, shopped game and now when I turn on top display shows scrambled lines and it does not boot. When first turned on there are 4 ding, ding, ding,ding, then a dong. (If that makes sense). The 3 LEDs come on on the board and the middle one flashes continuously while the 2 on the end stay on. I did unplug the ribbon cable to the display from the board while cleaning. Where to start looking??? Thanks