Horizontal Video Static Bars

[legofan623]

I'm just about finished with this portable, but there's still something that's bugging me about it. When I have no TV connected, the LCD looks like this:

This is fine, the video looks good. When I connect it to a TV though:

I get these nasty static lines. They're reflected even worse on the TV:

I've tried it on two different TVs, same deal. What do I need to do so that this doesn't happen?

 

[Blargaman91]

Are you using custom regulators? If you are, raise the CPU and/or GPU voltage a bit.

Have you tried turning the LCD off? It might just not work with a TV connected depending on your LCD.

 

[legofan623]

Using stock regs, I'll try disconnecting the internal LCD.


EDIT: The picture looks great when the LCD is disconnected, thanks for the tip!

 

[The_Next_Guy]

I'm not 100% sure but I believe you need a video splitter to properly display to 2 different displays. Reason being that the one Display processes data and puts a slight load on the video line and when you pull 2 times, the displays fight for the signal.

 

[legofan623]

I'm having trouble locating a small powered video splitter, but I did use a shielded wire for the RCA jack and it helped a little bit, but not much. I guess it's the "output switch" life for me...

 

[The_Next_Guy]

Yeah this might also hapen to audio as well so use a 2 position triple pole switch for video left and right.

 

[legofan623]

I already have my audio on a 3.5mm jack with a NC switch so the speakers auto-off when headphones/audio-out are plugged in. I might get this jack so that it auto-disconnects my internal LCD in the same fashion:

http://www.allelectronics.com/make-a-store/item/rcj-65/rca-jack-w/nc-switch/1.html

 

[RedmagnusX]

You can just use a simple On-Off SPDT switch too. All you would have to do is wire it on the Video line between the screen and the Video out.

 

[The_Next_Guy]

I already have my audio on a 3.5mm jack with a NC switch so the speakers auto-off when headphones/audio-out are plugged in. I might get this jack so that it auto-disconnects my internal LCD in the same fashion:

http://www.allelectronics.com/make-a-store/item/rcj-65/rca-jack-w/nc-switch/1.html

That sounds like it may be great or a pain. What if you want to play with the speakers on but with the internal screen