How to change or reset PS3 Video Display Mode

actually tv is not full hd & not sported play station signals through HDMI

When you attach your Play Station 3 to an HD TV through an HDMI port, the Play Station 3 will ask you if you wish to switch to HD Mode.

However, if you decide to move it to another TV that is not HD compatible, you will get no picture because the Play Station 3 is “stuck” in HD (HDMI) mode.

Follow these steps to resolve your problem:

1. Turn off the PS3 so it only shows a red light. You can hold the power button on the front until it goes into standby. To be sure, flick the power switch on the back of the Play Station 3 off and then back on.

2. Make sure your Play Station 3 is connected to your regular TV (not HDTV) with the standard video cables.

3. Press and hold the power button until the screen "flickers" and then immediately release. This should reset the video settings.

4. Wait a few seconds, and the Play Station 3 (PS3) logo should appear.

If this does not resolve the problem, follow these steps:

1. Turn off the PS3 so it only shows a red light. You can hold the power button on the front until it goes into standby. To be sure, flick the power switch on the back of the Play Station 3 off and then back on.

2. Make sure your Play Station 3 is connected to your regular TV (not HDTV) with the standard video cables.

3. Press and hold the power button on the front until the Play Station 3 beeps and then turns off again. This should reset the video for you and you can turn it back on after this.



That’s it! You can play your Play Station 3 again!

1. Make sure the AV Cable is connected to the [AV MULTI-OUT] port on the back of the PLAYSTATION 3 system.
   
2. Connect the other end of the AV Cable into the yellow Composite port for video, and into the white and red audio ports (if your TV does not have the red port, simply ignore it) on the back of your TV.
   
3. While the PLAYSTATION 3 system is in standby mode (red light on the front of the system), hold down the touch-sensitive On/Off button on the front of the system until the system goes into standby mode again . (So the light cycle would go from: red light to --> green light --> then back to red light) This will ensure that you have held down the On/Off button long enough to reset the Video Output Settings.
   
4. Turn ON the PLAYSTATION 3 and once the system finishes powering up, the Video Output Settings will automatically be reset to the standard resolution (or detect the current display output settings of your TV/monitor).
   

cfusion.com has the mainboard for that. it sounds like you just need a new one, it looks like its about $169