I have a suggestion or two for the cause of lack of sound with your DVD player. You may need to correctly assign the digital input. I'm not sure what the default connection for DVD players is on the 2500. I tried to download the manual but I'm having trouble with pdf documents right now. How do you have yours connected? I know the default on my Marantz was an optical one, and since I use digital coax connections I had to go in and correctly assign the input. Also is DTS enabled on your DVD player? Many DVD players still come from the factory with this option disabled, and you have to do into an onscreen menu to trun it on. I doubt this is the cause but just in case pop in a dolby digital dvd and see if you get better results.
As for the tuner I've only got one idea. Tuners in most receivers suck. You may not be able to pick up any stations with your receiver. My receiver had a $1300 US MSRP and it can only tune in one station at my house. The $20 alarm clock radio lying next to my bed it gets at least 10 stations. You wouldn't get static if this is the case, just silence.
