Radeon 1950GT flickers when using the TV-out

January 28, 2010 at 04:38:23
Specs: Windows XP

When a connect my radeon 1950GT/512RAM via a s-video tv-out to my pal tv-in on my TV, the image on the TV starts to flicker/jump when displaying bright colors (eg. windows explorer window - it is all white, or shooting, sun or explosives in movies_. The strange thing is that it does not flicker at dark objects like desktop (especially when the desktop picture does not have preliminary the white color, or in darker movies where there are no dark scenes, no sun, no bright light). Strange that everything was OK before a moved my PC from one apartment to another :) and the problem started. I bought a new cable to connect the devices (PC and TV) the the problem remained.
I have not changed the drives before or after the move, so that's not the problem.
If you have any suggestions, i would gladly like to have them:)

Thanks in advance,


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January 28, 2010 at 10:12:07
I'm assuming this is a desktop computer, the 1950GT video is on a card in a mboard slot.

"Strange that everything was OK before a moved my PC from one apartment to another "

I'm assuming the S-Video cable is not damaged - never unplug it by pulling on the cord rather than the end connector - doing that will damage the wires inside the cable or the plug, eventually, or possibly right away if it was yanked on - and is plugged in properly on both ends.
Don't use or buy an inferior cable - the fatter it is, the more likely it's shielded better and you won't have display problems.

You probably have loosened something inside the case.

Unplug the case/power supply, or switch off the AC power to it otherwise.
Power off your monitor.
Open up the case by removing the left panel as seen when you're looking at the front of the case.
Check all the connections of the wiring to make sure they are all the way onto their pins and into their sockets, especially the main connector from the power supply. The wires close to the mboard going into the main power connector/socket should be more or less perpendicular to the mboard surface rather than at an angle. Make sure all cards in slots are all the way down in their slots - especially the video card.

See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:

While you're in there, if the cpu fan/heatsink has mung (dust, lint, etc.) on it, clean it off, but DO NOT use a vaccuum cleaner to do that (they produce a tremendous amount of static electricity when running, and anything connected to them can discharge that to your components) - use canned air, or an air nozzle if you have access to an air compressor, or an artist's brush that can be used in small spaces, etc. It may be difficult to clean the top of the heatsink under the cpu fan - the most likely place to have mung on it - and the bottom side of the cpu fan blades unless you remove the fan. If you have a case fan, clean that too if it needs it.

Also check for mung on the video card fan and heatsink if it has that, and the power supply's openings / fan.

With the cover still off, restore the AC power, start the computer and make sure the cpu fan spins - if it doesn't spin, if you're sure the power supply is working okay, don't use the computer until you have replaced it.
If it spins too slowly, and/or if it makes rattling or screeching noises, most likely to be noticed when the computer has cooled to room temp, has not been used for a while, and then is started up, the cpu fan's bearings are failing - replace it as soon as you can.

Restore AC power, try the computer.


If you still have problems, similar to in this,

Unplug the case/power supply, or switch off the AC power to it otherwise.
Try cleaning the contacts on the video card.

If that doesn't help, if the cable is fine, the video card, or at least the TV out circuitry on it, is probably damaged.

By the way, if your TV has a VGA and/or a DVI input port, you'll get much better looking video on the TV if you connect to that instead, and set the TV video source to the appropriate input.
If it has that, it's capable of supporting both TV and computer monitor display - the latter always looks better.
XP may not automatically find that the second display is a monitor display on the TV.
In that case, RIGHT click on the second display in Display Properties - Settings, and enable it.

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