The 2.5" LCD display Monitor in NV-GS5B stopped displaying. It's completely black (like it is not turned on). First it still displayed image when the LCD display was opened a bit, and when opened further it was black again, but later it didn't display any image even when a little opened. It's black all the time no matter in which position it is opened. Please advise what happened and how can I fix it myself. I tried the restart button once, but it didn't help. Image in the Viefinder is displayed correctly when the LCD Monitor is closed.