Cannot get AV menu to display on TV

[kevinsonic]

I am trying to get to the amp menu via tv so i can raise the default volume levels of my amp after reset.

the Nad only outputs video via the component monitor output.

nad is a t755.
But the TV seems to get no signal. the only vintage tv i have is an LG 47LW4500 from 2011.
It has component inputs and AV input.

The nad has a monitor out output, also component. and that is the only output that can produce the amp menu from what i understand in the manual: https://manualmachine.com/nad/t755/6517615-user-manual/

I switched the TV to component but get no signal,

I am using AV cables but i assume it is ok ? as long as PR from AV connects to PR on tv. then PA - PA and Y-Y. ?

do i specifically require component plugs, are these wires wired differently internal from av plugs.

or What could i be doing wrong ?
Attached pictures of the setup.

the cables shown is the cables i tried.

 

[staticV3]

T755 User Manual, Page 12:

ABOUT THE ON-SCREEN DISPLAY (OSD)
The T 755 employs a simple, self-explanatory system of on-screen display “menus” that will appear on the
connected video monitor/TV. These are required during the setup process (and are useful in day-to-day
operation), so be sure to connect the monitor/TV before proceeding with setup.

DISPLAY THE OSD
Press either [ ] or [ENTER] buttons of the HTR 3 remote control or front panel to display the T 755’s Main
Menu on your video monitor/TV. If the OSD does not appear, check your MONITOR OUT connections.

This implies that the OSD can be displayed on all connected monitors, via Component or HDMI.

If you can't get the component output to work, try using HDMI instead.

 

[kevinsonic]

​

The manual lists “VIDEO INPUT” options including HDMI, Component, S-Video, Composite.
But for the "Video Monitor OUT" it refers to Component Video OUT, S-Video OUT, Composite Video OUT.
Under the OSD/On-Screen Display section, it instructs you to “check your MONITOR OUT connections” if OSD does not appear.

 

[kevinsonic]

osd wont work over hdmi, should i get different component cables ? Or could i try the stereo to rca plugs? There is a stereo av output on the tv as well.
i don't understand what i am doing wrong

 

[-Matt-]

I am using AV cables but i assume it is ok ? as long as PR from AV connects to PR on tv. then PA - PA and Y-Y. ?

do i specifically require component plugs, are these wires wired differently internal from av plugs.

I seem to remember that component video cables were supposed to be 75 Ohms impedance, and that some devices could be quite fussy about this.

So yes, there is a chance that a proper component video cable could get it working.

But at this point you have to consider if it is worth it. You could probably pick up a used HDMI capable AV receiver for not much more than the cost of the component video cable.

 

[kevinsonic]

I seem to remember that component video cables were supposed to be 75 Ohms impedance, and that some devices could be quite fussy about this.

So yes, there is a chance that a proper component video cable could get it working.

But at this point you have to consider if it is worth it. You could probably pick up a used HDMI capable AV receiver for not much more than the cost of the component video cable.

Thanks........ but normal RCA cables should work yes or at least give some sort of unreliable picture ? Many seems to say that it does ?

I have spent so much on this amp and it was at a technician earlier who solved the channel issue (only one channel worked now both work) (the sound just is not outputting 100% volume outputs around 40% very clear which leads me to think it might be a setup issue ) but have no more funds left to send to a technician let alone try getting another amp.

i cant get a definate answer on how to changer speaker volume limits by just using the av lcd without having a tv on this receiver.

(i now have used 3 different cable types plugged it into component and composite inputs of the tv, changed the cables around many times (different sequences), i hear background noise as i plug things in and out of the nad but i see no OSD. (i mean it should at least show one layer at some stage mono colored) Either the t755 is the biggest lemon in AVR history or i am stupidly dumb or the TV just does not like nad's.)

 

[Tre2023]

I am trying to get to the amp menu via tv so i can raise the default volume levels of my amp after reset.

the Nad only outputs video via the component monitor output.

nad is a t755.
But the TV seems to get no signal. the only vintage tv i have is an LG 47LW4500 from 2011.
It has component inputs and AV input.

The nad has a monitor out output, also component. and that is the only output that can produce the amp menu from what i understand in the manual: https://manualmachine.com/nad/t755/6517615-user-manual/

I switched the TV to component but get no signal,

I am using AV cables but i assume it is ok ? as long as PR from AV connects to PR on tv. then PA - PA and Y-Y. ?

do i specifically require component plugs, are these wires wired differently internal from av plugs.

or What could i be doing wrong ?
Attached pictures of the setup.

the cables shown is the cables i tried.

A composite or component connection to the TV should work according to the manual. Try a composite(yellow) connection from the receiver’s composite(yellow) Monitor Out port to the TV’s AV1(composite/yellow) port.

 

[kevinsonic]

The 3 in black is output, i tried them and connected it as you said, but the tv continually says no input.

 

[Tre2023]

Make sure to select the component #1 port if connected to the component #1 on the TV. Select component #2 if connected to the component #2 port. If the component ports do not work, try the composite(yellow) Monitor Out port on the receiver and connect to the TV’s AV1 composite(yellow) port.

 

[-Matt-]

Just checking, do you have the cable behind the tv connected as shown in your previous photo? I.e. connected to the compoSITE video (yellow) and red/white stereo audio.

If you want compoNENT video, (which is the better standard offered by the Nad) then you need to be using one of the two component inputs. (Sets of three connectors circled below).

These should be connected (in the right order) to the three component video outputs that you arrowed black in this photo...

 

[-Matt-]

Thanks........ but normal RCA cables should work yes or at least give some sort of unreliable picture ? Many seems to say that it does ?

No guarantee

If they don't work for component, RCA cables will probably be fine for composite video (single yellow connector). For this you would leave the cable on the back of the tv as it is shown in the photo and plug the yellow plug to the monitor out connector that @Tre2023 showed.

 

[kevinsonic]

Make sure to select the component #1 port if connected to the component #1 on the TV. Select component #2 if connected to the component #2 port. If the component ports do not work, try the composite(yellow) Monitor Out port on the receiver and connect to the TV’s AV1 composite(yellow) port.
View attachment 496536

Wow i was about to give up i already packed everything up wanted to put the amp in the bin and am very glad i have one last shot at it, i have not tried using this port. I will take the amp out of the bag and set it up again first thing in the morning will post back with the results.

So i need to plug the yellow cable that as per the picture from the tv that is plugged into AV IN video port (composite) on the tv as shown on pic, into this yellow composite port on the nad. Ok got it will do..

(one thing i am concerned about. From what i understand, all video outputs go through 1 video board inside the amp (from what i understand) so if the top monitor out output don't work, perhaps chances are this monitor output might not work either ? Anyway, thank you its definitely worth a try. i will report back tomorrow.

 

[kevinsonic]

Just checking, do you have the cable behind the tv connected as shown in your previous photo? I.e. connected to the compoSITE video (yellow) and red/white stereo audio.

If you want compoNENT video, (which is the better standard offered by the Nad) then you need to be using one of the two component inputs. (Sets of three connectors circled below).

View attachment 496537

These should be connected (in the right order) to the three component video outputs that you arrowed black in this photo...

Yes i tried both of those, interesting that the tv recognizes that it is connected as only the ports that are active is shown in its menu, (component 1..2 etc..) the others is greyed out, so the tv recognizes the plugs being connected, but connecting the other end of the plugs to the nad, nothing shows on the picture just "no signal" OSD active does show on the nad lcd so it should show on tv, but it doesn't.

 

[-Matt-]

Yes i tried both of those, interesting that the tv recognizes that it is connected as only the ports that are active is shown in its menu, (component 1..2 etc..) the others is greyed out, so the tv recognizes the plugs being connected, but connecting the other end of the plugs to the nad, nothing shows on the picture just "no signal" OSD active does show on the nad lcd so it should show on tv, but it doesn't.

Assuming that it was wired up correctly, this is probably the sort of behaviour you might expect from incorrect cable type.

The signals sent over component video cables are analogue. Those video signals have quite high frequencies (horizontal line scan rate is only 33kHz but pixel clock rate is ~75MHz for 1080i). Much higher than audio frequencies that RCA cables are typically used for. The TV needs to be able to lock on to that signal.

Ideally component video uses 75 Ohm coaxial cables to transmit those signal with sufficiently low distortion. With RCA cables you might get reflections or have enough interference that the signal becomes too distorted for the TV to lock. This could be why it knows something is connected but can't display a picture.

With a short enough RCA cable and a TV that has a well designed component video input it might work. But in general, you will probably have much more luck with a proper component video cable.

Anyway, give the composite input a try first; if it works that should be good enough for viewing menus.
Good luck!

 

[kevinsonic]

Assuming that it was wired up correctly, this is probably the sort of behaviour you might expect from incorrect cable type.

The signals sent over component video cables are analogue. Those video signals have quite high frequencies (horizontal line scan rate is only 33kHz but pixel clock rate is ~75MHz for 1080i). Much higher than audio frequencies that RCA cables are typically used for. The TV needs to be able to lock on to that signal.

Ideally component video uses 75 Ohm coaxial cables to transmit those signal with sufficiently low distortion. With RCA cables you might get reflections or have enough interference that the signal becomes too distorted for the TV to lock. This could be why it knows something is connected but can't display a picture.

With a short enough RCA cable and a TV that has a well designed component video input it might work. But in general, you will probably have much more luck with a proper component video cable.

Anyway, give the composite input a try first; if it works that should be good enough for viewing menus.
Good luck!

aah that makes perfect sense so with the actual component cables it might actually work.

 

[kevinsonic]

Make sure to select the component #1 port if connected to the component #1 on the TV. Select component #2 if connected to the component #2 port. If the component ports do not work, try the composite(yellow) Monitor Out port on the receiver and connect to the TV’s AV1 composite(yellow) port.
View attachment 496536

It works it WORKS ! aaaaahhh this is wonderful ! Thank you so much ! I almost binned the amp !

 

[kevinsonic]

At last i could see that the default setting is a t 0 dbs on all the channels, so i guess / hope upping them to +13db each which is max, would make a difference in the output.
Still not out of the woods it still might have components thats failing so i don't want to get overly excited i just hope/pray i can get stereo in any mode at least on the fronts.
BUT the OSD it works ! ! I have not delved into all the settings yet as a i was just so glad that it finally worked and savor the moment and still am ! ! !

 

[-Matt-]

Glad you got the video output working.

It sounds like you are describing the per channel trim adjustments. It should be fine for those all to be set at 0dB (which is full normal volume). +13dB is quite a significant boost and could make it more likely to clip.

The typical use would be, for example, if your front speakers are more sensitive than your surrounds then you might adjust them down a bit relative to the surrounds (or the surrounds up). Obviously overall volume should normally be adjusted with the main volume control. ...but perhaps I'm not understanding what the actual problem is?

How are you connecting the audio input and what is the source device?

 

[kevinsonic]

Glad you got the video output working.

It sounds like you are describing the per channel trim adjustments. It should be fine for those all to be set at 0dB (which is full normal volume). +13dB is quite a significant boost and could make it more likely to clip.

The typical use would be, for example, if your front speakers are more sensitive than your surrounds then you might adjust them down a bit relative to the surrounds (or the surrounds up). Obviously overall volume should normally be adjusted with the main volume control. ...but perhaps I'm not understanding what the actual problem is?

How are you connecting the audio input and what is the source device?

The problem i have is that at full volume it only outputs at 40% (so its either a "safe" "reset" setting, or a component is failing which i really don't want to believe before i tried absolutely everything first....but knowing it might be a hardware issue though.

Source is PC, i simply need stereo with 2 front speakers. Direct would be ideal but not sure if that can be had as i heard this amp takes everything through the DSP chip regardless of what it says. Anyway i just want it full power in any mode that will work on the 2 fronts.

So thats why i thought perhaps to increase it to +13 db, i have not looked at the other parameters yet am at families place right now but if there is something else i could check please let me know as i will be back soon.

 

[-Matt-]

The reason for asking how it is connected and what is the source is because I suspect the problem could be on the input side...

I.e. The voltage level of the output (from your PC I guess) could be too low.

So how are you outputting from the PC? Motherboard headphone socket?
Motherboard line out?
Sound card?
USB interface?
Do you have the option of optical or digital coaxial output?
What connection type and which ports do you connect this to on the AVR?
What is the PC volume set at?
What software are you using?

It is a bit hard to help unless you let us know such details.


Setting the trim values to +13db probably isn't the right thing to do. (Maybe as a last resort workaround if the AVR actually has a hardware fault).


You are quite specific about it being 40% output. How do you know this? Is it an estimate based on memory that it went louder previously, or is there something on the display that is telling you volume is at 40% and won't go higher?

What speakers are you using?
Are they a non-standard impedance or very low sensitivity?