Hi, I have the above receiver, just lately I have noticed that the display is dimmer than it used to be, I have adjusted it to full brightness using the handset but it is noticabley dimmer than the display on the Denon F-103 unit I have it connected to, they used to be the same brightness. All the characters are lit, but not very well, if it is the LED's that need replacing is it possible to do it as DIY project. Phil