I cant get my ps3 to reset. I was using it on a HDTV and I swicthed it back to a regular tv using AV cables and it will not show pic. just sound. Everybody says to reset it by pushing the button on the front. First beep it turns on second beep nothing and third beep turns off.will not reset.

To clarify, your TV is working correctly, since you get sound and video from all devices - Only your PS3 has no sound or video?

If your PS3 was previously used with regular AV cables (Red/White/Yellow) then you most likely need to do a PS3 video reset t output video over HDMI.

With the PS3 OFF, press and continue holding the power button until it turns on, beeps twice, and then turns back off. Do not release the power button during this process.

You may have to try the video reset a few times if it doesn't work right away.

After video reset, you should get sound and video over HDMI.

Check that the HDTV (or video monitor being used) has been set to use the HDMI input to which the PS3 is connected. Make sure that HDMI has been selected in the PS3's "Settings" and that it has been set to "Automatic."

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.

am sure about the computer part but for the xmb i can help reset ur ps3 by turning it on then turn it off by holding the buttonthen it back on by holding the power button it should beep pause and beep 2x this will reset ur display option back to normal then ur cables make a difference if ur using a SD TV use regular cables if HDTV use hd cables only on hdtv if use on SDtv it won't display or ur ps3 is set to an hd setting like 1080p it won't display on a sdtv so reset ur ps3 by holdin power button hope this help u

YES,ON YOUR TV GO TO CHANNEL 0 THEN DOWN ONCE AV CABLES ARE HOOKED UP,SOMETIMES ITSCH.69 JUST KEEP TRIN AND IT WILL POP UP,MAKE SURE RED,YELLOW,WHITE ARE IN RIGHT HOLES ...RED IS PIC. WH.SOUND

you have to manually change the output in the settings menu back to ANALOG Using an HDMI TV or monitor 1st, when you select RCA, or AV output and restart, it will work, but when you switch back, you have to change it (back to HDMI output) on the analog monitor, or use analog TV inputs, then reboot PS3 and connect HDMI.
I do not know why Sony did not make this switch automatic and self scanning on boot, but alas I have had the same issue, so I know this is your problem, not the AV cables.

Please give a fixya rating if you find this solves your problem, Thanks for the question

It happened to me too. When you plug in your av cables and are ready to play, follow these steps. With your PS3 off (Red light on), Press and hold the power button on your console. (Do not use the controller to turn it on.) Keep holding the button until you hear a second beep. (it takes about 2 to 3 seconds.) You will notice your screen flickers, then your PS3 will show up on the tv. All you did was reset the PS3 display settings. You can always go back to HDMI or AV cables. Have Fun.

Just plug the AV cable in as normal. The PS3 auto-detects the AV cable. Turn your PS3 on first, then your TV. Change the channel on your TV to your AV channel (YPBPR) and it should come on fine.

u need to set the display output back to standard av cables. search online and there should be steps on how to do this.

if you have a SD TV. ( standard display, not HD ) but chose the HD display option on system settings you wont see picture but hear sound. and same goes if you've chosen SD display but own a HD TV. so try to reset your system somehow or take it in for inspection.