I have just purchased a Denon AVR 3310, it was from a store who had a lay-buy customer who never finished paying for it. I have it connected to my Panasonic TH-P55ST30A. Inputs are a Panasonic Bluray player and a Home Theatre PC (HTPC) which runs MythTV and XBMC.
The amp replaces a Yamaha RX-1900, which was a great unit, but is now in another room. When my HTPC was connected to the Yamaha, the brightness of the plasma was set exactly at 0 for my tastes. Setting the plasma at 0 for the Bluray player was also spot on. If I connect either the HTPC or the Bluray player directly to the plasma, 0 is once again the perfect setting.
But, with the new Denon receiver, the brightness is great for the Bluray player when set at 0, but for the HTPC I need to drop the brightness level of the plasma to around -15 for the same appearance as previously. I know the receiver has a brightness setting in the setup, but this is also set as low as possible. Even so, the picture looks a little washed out now when compared with the Bluray player.
I saw that in this post
someone also had birghtness problems, but the issue there was too dark, the opposite of my issue.
I have the latest Nvidia drivers for the PC, and have tried many different settings at the input stage, and I can get the correct setting briefly if I setup the graphics card to send Ycbcr444, but as soon as the Refresh rate changes from 50Hz to 24Hz (for example) the brightness problem returns.
It seems like the problem is with the 3310, since if you remove it from the equation everything plays as it should.
Has anyone got any suggestions for me?