BluRay DVD Player and Receiver Issues?

Frankly, the best thing to do would be to buy a proper HDMI equipped home theater receiver. If you did that, all of your hi-def sources would feed into the receiver with HDMIs, and then one HDMI would run from the receiver to the TV. The TV's optical audio output would then go into the same input on the modern receiver. The CD player would simply connect into an RCA stereo audio input, as before. Sorry, but in an HDMI hi-def world, receivers without HDMI are... obsolete. The only way to do what you want would involve connecting a DVD/BluRay player direct to the TV with an HDMI, and then using just audio connections back to the obsolete receiver. I have no way to figure out how your TV could feed it's audio to that obsolete receiver.

Your receiver is fine. Don't worry about buying another one. OK, so HDMI isn't an issue because you can run HDMI straight from any DVD or blu ray player straight to the TV. Now the sound, your receiver has multiple optical, digital inputs, and one digital coaxial input. So, buy an optical cable and run that from the blu ray to the receiver. That's it, you are done. Just repeat for the 5 disc player. You didn't mention if the Yamaha powers the bose speakers, or if the bose speakers are part of a bose home theater system. Bose systems are never made with upgrading or plugging in other components, so you won't have many options with a bose system. I have a very high end Yamaha receiver, the V3000, it had a retail price of about 2,000 US dollars when it came out late 2000, early 2001. Way before HDMI and cheap HDTVs. I got it brand new in 2003 for 650 and promised myself I wouldn't buy another receiver for 10 years. So I've got one more year before I even think about looking for a new one, and I might not to be honest. When blu ray and HDMI became common, it didn't really matter. My blu ray sound goes straight to the receiver, and I still get legacy dolby and DTS surround over optical, and while it's not the true HD dolby and DTS sound that blu ray usually carries, it still rocks the house. If you really want to, you can search out a blu ray player with analog multi channel outputs for HD sound from blu ray, your Yamaha has one set of 6.1 multi channel inputs. It was put there for future formats. I have one too, but I don't use it. Taken from the Yamaha site "The HTR-5550's rear panel has input jacks to accommodate an external decoder. The receiver is ready for any other 5.1 multi-channel format, should one be developed." That was there for DVD-Audio and Super Audio CD (SACD) but it's also perfect for blu ray players that have the proper output, it's not very common by the way, usually only the high end players have it.

Your TV should have an "audio out" pair of RCA jacks (white and red). Run those to the input channel on the Yamaha which you would like to use for everything the tv plays. That way, whenever you're on that channel, whatever is on the tv is playing on the stereo, regardless of the source. (cable, dvd, video game, etc.) Connect your dvd/blue ray type machines using the best protocol available on your tv and receiver. If the tv takes component (3 RCA-red, blue, green) and the machine sends it, that's superior to co-ax cable, composite (yellow RCA), and s video. If all the receiver takes is L & R "line in" RCA, then that's the one to use. If the Yamaha takes "toslink" or the orange rca for "digital audio" use one of those if it's available from the tv. Good luck.