I need the remote code for the Yamaha HTR-5740 Surround Sound System. It is for the 3 in 1 Comcast Remote.

I have a Yamaha RX-V571 AV Receiver and the published codes don't work for my Comcast silver remote w/ Red OK button. Managed to make it work while living in MD. Now in FL, have new remote and don't remember how I made it work before. Would love some help. T Y

Speakers don't connect to inputs. Have you looked at the manual?

Rear panel...
http://www.yamaha.com/yamahavgn/CDA/ContentDetail/EnlargedImage.html?CNTID=202147

http://www.retrevo.com/support/Yamaha-HTR-5740-Receivers-manual/id/1075bh240/t/2/

Consider the speakers as major contributors to the 'sound'.

<a heref="http://universalremotecodes.blogspot.com/">Magnavox Universal Remote</a> CHECK remote codes here!

if you can open the remote try cleaning the board this will help make the contact

the other way to test remote is a camra on phone
turn on camra and press the buttons and if you see a flashing light then that button ok try the rest

my phone say that initial programming needed can you sold this for me

Here you go dude:
http://www.comcast.com/MediaLibrary/1/2/CM/VanityURL/documents/comcast_on_demand_remote_manual.pdf

If you can find codes for Marantz receivers they might work. Yamaha makes Marantz like Pioneer to Premier & Onkyo to Integra.

Do a code search from comcast. If you have the Comcast manual it shows you how to search for codes manually, it can take 15 to 20 minutes for you to do it, however, it should fid your code. The only drawback is that you can only control the volume and power, you won't have input or soundfield control. Hope this helps

You may find this helpful. https://www.hifiengine.com/hfe_downloads/index.php?yamaha/yamaha_htr-5760_en.pdf

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I'm trying to figure out the same thing, so if you ever figure it please let me know, I will do the same. thanks.