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atunguyd is offline atunguyd
2010-01-15 , 02:44
Posts: 90 | Thanked: 47 times | Joined on Dec 2009 @ Sydney Australia
#21
EricG,

Interesting images - apart from seeing a good old VM700 that is

The TV is a receiver and sends to signal back to the N900 so there is no signal to tell the n900 that a TV is connected to it.
Personally I am thiking along the lines of the NOKIA detecting a TV connected by looking at the load impedancce of the device connected to it. Eric could probably easily prove this to us by connecting a resistor in series ( to increase) or parallel (to decrease) the impedance of his VM700 and then seeing if the nokia outputs a signal still after it is connected.

It is not unheard of to get TV's which are out of spec in this regard - we manufacture set top boxes and have found some brand name TV's to get this wrong too (also we have found some to be AC coupled instead of DC which also affects the impedance). It could be that your TV is wrong and not the nokia.
 
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JonWW is offline JonWW
2010-01-15 , 03:01
Posts: 623 | Thanked: 289 times | Joined on Jan 2010 @ UK
#22
Do you have any old Nokia phones?
You could try plugging in another model see what happens. It would help narrow down the problem.

Someone found a solution here by pulling the connector out slightly,
 
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aironeous is offline aironeous
2010-01-15 , 03:08
Posts: 819 | Thanked: 806 times | Joined on Jun 2009 @ Oxnard, Ca.
#23
This should be a brainstorm item. Lots of pico projectors and home projectors affordable today and people will want to play games on a large display. Should add another category and icon to app manager called tv out for games that support other resolutions and OS should allow this.
 
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pagesix1536 is offline pagesix1536
2010-01-15 , 03:15
Posts: 232 | Thanked: 102 times | Joined on Nov 2009 @ Warren, MI, USA
#24
Just to add more to this...I have experienced this on a normal television as well (meaning, not an in-car display). We have a 27" low-definition screen at my workplace that will not display a picture coming from the N900 no matter what video input I try (video 1, 2, or front 3) or in what order I connect the cable.

But at home I have no problems getting it to display pictures on either my 36" Panasonic, or my 32" TV. All of these are low-def screens too, no plasma/lcd high-def displays. Just old school TV's with component in.
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colnago is offline colnago
2010-01-15 , 04:19
Posts: 518 | Thanked: 160 times | Joined on Dec 2009
#25
Originally Posted by pagesix1536 View Post
Just to add more to this...I have experienced this on a normal television as well (meaning, not an in-car display). We have a 27" low-definition screen at my workplace that will not display a picture coming from the N900 no matter what video input I try (video 1, 2, or front 3) or in what order I connect the cable.

But at home I have no problems getting it to display pictures on either my 36" Panasonic, or my 32" TV. All of these are low-def screens too, no plasma/lcd high-def displays. Just old school TV's with component in.
You know its not a "component" connection right?
 
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pagesix1536 is offline pagesix1536
2010-01-15 , 04:27
Posts: 232 | Thanked: 102 times | Joined on Nov 2009 @ Warren, MI, USA
#26
Whoops...mis-typed. Composite w/ stereo audio...not component.
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bj4_now is offline bj4_now
2010-01-15 , 05:03
Posts: 6 | Thanked: 2 times | Joined on Jan 2010 @ Markham Ontario Canada
#27
In your very first post you said "I have tested other devices with the plugs, so I know that they are working"; what do you mean, because the "pinouts" of the Nokia CA-75U cable that comes with the N900 are not "standard"? If you are trying to cable from the N900 using a camcorder style A/V cable (3.5mm to RCA white/red/yellow) it will not work since Nokia uses a different section of the 3.5mm jack for "ground" than is used by almost every other manufacturer.

Just thought I would ask - if you are using the Nokia CA-75U cable then obviously it is another problem than incompatible cables.

Hope you get it sorted!
 
mikings is offline mikings
2010-09-25 , 07:50
Posts: 3 | Thanked: 1 time | Joined on Sep 2010
#28
Originally Posted by bj4_now View Post
In your very first post you said "I have tested other devices with the plugs, so I know that they are working"; what do you mean, because the "pinouts" of the Nokia CA-75U cable that comes with the N900 are not "standard"? If you are trying to cable from the N900 using a camcorder style A/V cable (3.5mm to RCA white/red/yellow) it will not work since Nokia uses a different section of the 3.5mm jack for "ground" than is used by almost every other manufacturer.

Just thought I would ask - if you are using the Nokia CA-75U cable then obviously it is another problem than incompatible cables.

Hope you get it sorted!
I checked my Nokia supplied cable (75U) with three different TV sets that have RCA video input connectors. I only get a picture and sound with an older Sony set (old enough to have a conventional tube screen). Two modern LCD TVs are not interested. As mentioned before in this thread, I think it is the input impedance to the TV "seen" by the N900. I will try when I am back home from my travels, to connect a 75ohm resistor to the video lead and look on the connector to see if I get composite video on an oscilloscope, and not if the impedance is AC coupled.

This is, of course, far from changing the output resolution...
 
virtual_one is offline virtual_one
2010-10-04 , 16:10
Posts: 6 | Thanked: 0 times | Joined on Sep 2010
#29
Hello! Could you please help me?

When I'm watching some videos on my portable DVD player, sometimes I
have two black areas on the top and bottom of picture and image is distorted (faces and so on). But on the N900 everything looks ok.
Is it possible to adjust it somehow?

Thanx.
 
alainlux is offline alainlux
2010-11-23 , 07:49
Posts: 17 | Thanked: 11 times | Joined on Nov 2010
#30
Originally Posted by mikings View Post
I checked my Nokia supplied cable (75U) with three different TV sets that have RCA video input connectors. I only get a picture and sound with an older Sony set (old enough to have a conventional tube screen). Two modern LCD TVs are not interested. As mentioned before in this thread, I think it is the input impedance to the TV "seen" by the N900. I will try when I am back home from my travels, to connect a 75ohm resistor to the video lead and look on the connector to see if I get composite video on an oscilloscope, and not if the impedance is AC coupled.
I've got a Philips Matchline TV, which has a voltage (of 145mV) on its video input when on... which royally confuses the Nokia. However, when off, the impedance "almost" matches (61 Ohm, which is close enough to 75 for the N900), so I just connect everything while the TV is off, and then I switch it on. Fortunately, the N900 only checks at start.

However, the TV is also very slow to switch on (a green CRT TV which needs to "pre-heat"), so it would be nice if there was a way to tell the N900 to ignore the impedance, voltage and everything, and just believe that a TV is connected.

This is, of course, far from changing the output resolution...
Indeed... soon I'll be giving a presentation about the N900, and I thought it would be cool to do it using the N900. The video projector I'll be using has TV in, and the setup works at standard resolution. However, as the projector can do much more, I was wondering whether there was a way to tell the N900 to output a higher resolution signal (such as 1024x768)
 
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