Question about NAD T755 Receiver

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I have an NAD T755. I am trying to hook up both my cable and PS3 to the receiver. No signal I have both my cable box and PS3 hooked to my T755 reciever. I can get a signal to my TV for my PS3, but when I switch sources to my cable box I get no signal with brief flashes of colored noise on the screen. If I plug my cable box directly to my TV (and dont involve the reciever) everything works fine. All of the cable connections I am using are HDMI. If I try switching HDMI inputs, that is use the input I have been using for my PS3 for my cable instead, I continue to get colored noise and no signal. What am I missing? would be surprised to find that my receiver is somehow broken, but I am not sure what else I can try. Please help.

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  • 8 more comments 
  • mblyle Mar 25, 2011

    I do not think you read my question. My PS3 connection to the reciever is working just fine. My cable box connection to the receiver is not working for some reason. I have HDMI from my cable to an input on my receiver and then HDMI from my reciever's output to my tv, but I cannot get a signal on my tv. When I make the same connections for my PS3 i get a signal and everything works fine so I know the receiver and all of my cables are working. I know my cable is working because if I plug HDMI straight from my cable box to my tv everything works.

  • mblyle Mar 25, 2011

    mblyle
    2 seconds ago
    I do not think you read my question. My PS3 connection to the reciever is working just fine. My cable box connection to the receiver is not working for some reason. I have HDMI from my cable to an input on my receiver and then HDMI from my reciever's output to my tv, but I cannot get a signal on my tv. When I make the same connections for my PS3 i get a signal and everything works fine so I know the receiver and all of my cables are working. I know my cable is working because if I plug HDMI straight from my cable box to my tv everything works.

  • mblyle Mar 25, 2011

    There is nothing wrong with the output of he receiver because it is outputting from my PS3 just fine.

  • mblyle Mar 25, 2011

    There is nothing wrong with the output of he receiver because it is outputting from my PS3 just fine.

  • mblyle Mar 25, 2011

    I don't see how it could be the cable box because the box works fine when I plug it directly into my tv. The issue seems to be something to do with the connection of my cable box to the receiver.

  • mblyle Mar 26, 2011

    Yes, I tried switching the cables around and found they are all working. I tried component cables with no success. I also called the cable company (ATT Uverse) and they verified that their cable box is compatible with my NAD receiver.

  • mblyle Mar 26, 2011

    The cable provider is AT&T Uverse. The model of the cable box is VIP1216 by Motorola.

  • mblyle Mar 26, 2011

    Some good suggestions here. I had not thought to try and switch the STB to a 720p setting. I'm on CST here so I was asleep for your other posts. I'll try some of this and get back to you. Btw the lack of audio across hdmi with the T755 is something that has always annoyed me.

  • mblyle Mar 26, 2011

    Turns out the STB was set to 720p. I tried setting it to 1080i and got more moments of colored noise through the NAD. I went into the NAD source menu and verified that the sources I'm using are configured for HDMI ( which we pretty well new because the PS3 works on each of them). So now we know that switching the STB from 720p to 1080i generated a different result, but far from the desired result. Any ideas?

  • mblyle Mar 26, 2011

    I verified in the source menu that the NAD sources are set up for HDMI. I was able to get a different result (not the desired, but different) when I switched the. STB (which was set at 720p) to 1080i. When I did that I got more frequent colored noise on the tv rather than the "no signal" message.

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2 Answers

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  • 346 Answers

Hi - Not a flash of brilliance I know, but have you switched physically the HDMI cables between the PS3 and STB before connecting to the NAD?

Also - You might try (if you have them) a set of component cables from the STB to the receiver to try and see if the cable box may be having having difficulty with your NAD.

If you can let me know the results of cables switching I'd appreciate it. On a personal note I both love and hate HDMI, having had similar problems 8^)

Good Luck

Posted on Mar 26, 2011

  • 4 more comments 
  • Michael Wafkowski
    Michael Wafkowski Mar 26, 2011

    Also - Knowing the brand, model of the cable STB and cable provider might help me help you trouble shoot.





    Mikeywaf

  • Michael Wafkowski
    Michael Wafkowski Mar 26, 2011

    What you just said really makes me go back to the receiver, not as broken, but as possibly mis-configured (No offense). Looking through the manual with 10 sources and all the permutations possible I would step through them again (I'm sure you have) but I just don't believe in Gremlins 8^)


    Mikeywaf

  • Michael Wafkowski
    Michael Wafkowski Mar 26, 2011

    Back again - To my mind you HAVE located the problem at least partially -- between the NAD and the STB. I would bet a nickel if you plugged another component with an HDMI port into the same ports driving you bonkers it would work fine.


    It's a known problem that the T755 has difficulty switching component sources at 1080i. Perhaps the HDMI does also (They never told anybody in their lit that the unit didn't carry audio over HDMI originally -- a useless aside but still). If you haven't already can you lower the source signal from the STB to 720P or even 480P just to test. 1080i switching through HDMI may be a problem (I'm not sure but I don't think the source signal from the PS3 is more than 720P?).


    Just something else to try.


    Mikeywaf

  • Michael Wafkowski
    Michael Wafkowski Mar 26, 2011

    The more I sit with your problem the surer I am (as you already were) that the problem is STB to NAD.
    Fact is that HDMI handshake issues with cable boxes are common and Motorola is one most frequent. Component cables STB to NAD also didn't work. The easiest workaround is to connect the HDMI cable directly to the TV with an optical cable from the STB to the NAD. I know you want your equipment to work the way you want it to work, especially a really nice unit like the NAD, but sometimes you can't push the river...


    Also - Since you obviously can't switch out the NAD, AT&T should have no problem switching out your cable box with another brand if possible and at the very least another model, at least for testing.


    Mikeywaf

  • Michael Wafkowski
    Michael Wafkowski Mar 26, 2011

    Hello - Again. Interesting but not surprising. from my logic list here you've identified each individual component as good, cables all good, variations of cables and device connections outside the NAD good. That doesn't leave much. I'm sure as we've gone on here that you're no stranger to this so yes we can rule out a missed setting in the NAD menu setup. From my end that leaves only a possible setup issue with the moto box (I can't help there because every provider has a customized setup.) This is possible but I think unlikely and it sounds like you've been that route with an At&T tech. I'm going to assume that you have given the STB a few hard resets along the way between setups. That really leaves, me at least, with the uncomfortable but basically unavoidable thought that the NAD and Moto boxes just won't make nice with each other -- at least these two specific physical boxes.


    I have not much to offer you at this point other than my idea of the (hopefully temporary workaround) of using HDMI from the STB to TV (and audio: STB to NAD or STB to TV to NAD via digital (optical or coax)). There is the possible issue of firmware, but the cable box upgrades get pushed automatically and the T755 last had a firmware update I think in '08. It seems that a bunch of T755 users (on avsforum.com have resigned themselves to video (Comp or HDMI) directly to the video display.) That leaves me with the idea/hope that U-Verse has another Box (brand or model) that might do the magic (and work as intended). I at this juncture have no other solid ideas or advice except to get At&T to swap out your box. Let me know you're thinking on this.


    Mikeywaf

  • Michael Wafkowski
    Michael Wafkowski Mar 26, 2011

    Hi Again - I'm off to a social engagement for the rest of the day. Sorry I couldn't give you a definitive solution. Close this session with me and move on to someone else it you'd like.





    Good luck and thanks for using Fix Ya.





    Mikeywaf

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  • 1,622 Answers

Hi, if your receiver supports HDMI audio, so no, you do not need to hook up an optical cable from the PS3 to the receiver for audio. It would actually be poorer quality audio that way.

First connect an HDMI cable from the PS3's HDMI output (it is the only HDMI port on the PS3) to one of the receiver's HDMI inputs.

Then connect an HDMI cable from the receiver's HDMI output (there is only one HDMI output on the receiver) to an HDMI input on the TV.

Those are the only two connections you will need to make, unless you also want to hear your TV programs through the surround receiver. You didn't say if you had satellite or cable, or if you are using an antenna for TV reception.

If you have a satellite tuner or cable box, connect it to the receiver using an HDMI cable. If that isn't an option, your receiver supports other connections. Use a component video cable and an optical audio cable if there is no HDMI output from your cable/sat box. In that case you would want the cable/sat audio output set to Bitstream.

If you are using an antenna with the TV's built-in tuner, then you can run an optical cable from the TV's optical output into the receiver's optical input. For audio, you would switch the receiver input selector to the optical input for TV, and switch to the PS3 input for that audio. The TV inputs would also have to chosen to see the correct video.

If you have the Slim PS3, then it doesn't matter if the PS3 HDMI audio output is set to Bitstream or PCM, both will give the same audio end result. If you have an older "fat" PS3, then the PS3 HDMI audio output has to be set to PCM mode.

Posted on Mar 25, 2011

  • SANYADE  OMOTOLA
    SANYADE OMOTOLA Mar 25, 2011

    Hi, Sorry about that.You will need to try out another cable box connection to be sure is from there.

    After that, if it does not function,that means there is something wrong with the out put of the receiver ..

  • SANYADE  OMOTOLA
    SANYADE OMOTOLA Mar 25, 2011

    You will need to try out another cable box connection to be sure is from there.It will solve the problem..

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