The way it can be brought back to normal is by pressing the "Standby" button on the tv and wait 5 seconds. Then press it again and as the TV was turning on, press the "Menu" and "Source" buttons on the tv simultaneously and when the tv was on it was on the menu. Turn the tv off with the remote turn it back on again with the remote. Should be back to normal. Hope it helps someone, it worked for a friend who had the same problem.
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The way it can be brought back to normal is by pressing the "Standby" button on the tv and wait 5 seconds. Then press it again and as the TV was turning on, press the "Menu" and "Source" buttons on the tv simultaneously and when the tv was on it was on the menu. Turn the tv off with the remote turn it back on again with the remote. Should be back to normal. Hope it helps someone, it worked for a friend who had the same problem.