crwdns2890332:0My tv screen stays black when turned on but I have soundcrwdne2890332:0(1) Unplug and remove back. (2) Check all ribbon cable connections. Make sure they are all fully seated. (3) Put back on and check. (4) If still nothing, see if led backlight is working by turning on in a dark room. Should see slight glow if led is on.