Thread: No TV Connected - ATI AiW

click on the link in my sig. Notice the part about 75 Ohms resistence under TFT-LCDs

[ 02-01-2002: Message edited by: Meatballman ]

That would explain why I can start the computer with the Video out hooked up to my Sony 36" TV and it work great. Wait till it's up and running, unplug the video, plug it into the 5" LCD, and it work too eh? Needs the initial resistance to tell it that a TV is present, then it supplies the signal. I understand completely, and I appreciate your response more than you'll ever know. One last question . . .

How in the name of God do you guys figure stuff like that out? I suppose it comes with electronics knowledge. Me? I'm just a poor ole Network Engineer/Computer freak. I suppose I should start getting more into the electronics side of things. Almost got hooked back with my arcade machine project (check other posts by 2119), just backed off of it when that project was over, and haven't went back. Anyway, thank you so much.

Jeffrey.

He He...I didn't think of it either. I just know where the FAQ is

Ok, you're not going to believe this . . .

There is not a single Radio Shack in the entire city of Tulsa that has a 75 ohm resistor. The closest they have is 72 ohm, and 82 ohm. My question is, will an 82 ohm resistor work for this application, or no? Like I mentioned before, I'm a little short on the electronics knowledge, but logic would dictate that if something wants 75 ohms, and gets 82, that the minimum 75 ohm resistance was met, and therefore could proceed. Logic doesn't tell me whether or not the extra 7 ohms will present a problem with the signal, or anything else for that matter. btw, it is an: 82 Ohm Resistor 1/2 watt, 5% tolerance.

Please let me know a.s.a. you can so I know if I'm going to have to drive around looking for another shop. As always . . . thanks in advance.

Jeffrey.

It should work fine. For confirmation, check this thread: http://www.mp3car.com/cgi-bin/ultima...c&f=7&t=000111

[ 02-01-2002: Message edited by: Meatballman ]

Buy the 72 ohm, along with either a 3 ohm or 3) 1 ohm resisitors. They can be connected in series to obtain the proper rating.

BTW 75 ohm is the standard for all video, and although they will work for short distances/low resolution, DO NOT USE NETWORK COAX CABLE FOR VIDEO They are 50 ohm cables.

I had thesame problem with thesame card and all I did was plug in the computer to a monitor then got a small wire peeled both ends then I stuck one end of the wire in the hole of the RCA TV out cable then the other end is supposed to make contact with outer part of Rca Cable, basically I joined negative and psitive together, then went display settings and TV is now available, checked it, then shutdown computer
then took wire of put computer in car and hooked up composite video LCD and presto.
I guess the video card keeps last settings.

Ok, I gave it a shot (82 ohm resistor was all I had this weekend on my trip to BFE, I'll try the 72+3 option also), and it didn't work. I still got nothing. I'm thinking though, that I don't have a real clear idea about the wiring. I cut an RCA video cable in half, stripped and stripped the wires down. I ended up with the shield wires, and the center pin wires exposed for each half of the cable. I then soldered the shield and center pin wires to one end of the transistor, and the same thing on the other end of the resistor. I'm thinking that I'm not supposed to have the shield wires and center pin wires shorting across each other, but then I don't know enough about it to do anything but speculate. The two information sources you guys have supplied don't really lay it out in 'dumb' enough terms for me I guess. Someone let me know if I'm crazy here . . . thanks.

Jeffrey.

I have to do this yet for my lcd, but what I got from reading the FAQ, etc is to attach one end of the resistor to the center wires and the other end of the resistor to the shield wires in the rca cable.