RE: No Picture

Be sure to check the cables. You may need to replace them.

Try the cables with another component, if possible.

Also, try using AV cables to verify that it is not the TV and to simply troubleshoot:

To get back to default AV settings:

Press and hold the power button until the systems shuts off. (wait 2 seconds)

Press and hold the power button again until it shuts off again.

Once you have verified that AV is working, turn off console, take out AV cables.

Plug in HDMI cable and turn system back on. Switch TV input to HDMI and it will ask you if you would like to use the HDMI cables, select yes again and verify.

If you cannot get sound, again, check the cables..

If new cables do not work, then your HDMI output is going bad, not from use rather normal wear and tear of the motherboard.

To get the best non HD picture, you will need to get some 'component' cables, rather than the standard AV (red, white, yellow).

Good luck

If you are using the video cable (multi-colored jacks on one end, big trapezoid on the other) with the switch on it, make sure the switch is on tv and not hdmi. If you are using the hdmi cable (small trapezoid connection on both ends) then you need to find the video cable. You should also check and make sure that your screen settings are not for HD.
Go to:
System settings
---Console Settings
-------Display
----------HDTV settings
If the HDTV settings option is available then you have the hdmi cable attached or the switch is flipped on the video cable causing the 360 to think you're transmitting to an HDTV.
Hope this helps you.

pay attention on how you hook them into the xbox..and if you are sure this is the way ..than switch to another HD input on the tv ...usually they have 3 HD channels..but not all work ...cause ar eon different frequencies or something like that ..Just try them all ..be sure you make the right choice in the channels too on the Hd of the tv ..

First check the AV audio/video wires to determine if you have SD or HD wires. If you have 3 plugs (red, white, and yellow) then you will get standard definition (SD). If there is 6 wires (2 red, white, yellow, blue, and green) then you can connect High Definition (HD) and you can also connect SD as well. Now what you need to look @ if you have the wires with 6 ends (component HD AV wire), is on the part where you plug into the back of the Xbox 360, there is a switch on the box that is on the wire. It should say "TV" and "HDTV". If you have the component wires hooked up (5 wires) then select "HDTV" if you have only the 3 wires (red white yellow) for SD hooked up switch it to "TV". That is the first thing to check. The next thing to check is the way the wires are hooked up. If connecting HD, you very easily could've mixed up the 2 red wires, 1 is video and the other is audio. The way to determine which is video and which is audio is, for video, the actual plug itself is gray with a stripe of color which indicates where it goes on your tv, the audio plugs are solid white or red. And remember that the yellow plug is not used for HD setup. If you have a Xbox 360 that has the HDMI (High Definition Multimedia Interface) input, then I would recommend using that to hook up your console. With the HDMI its only 1 wire to hook up and is extemely easy to set up. The HDMI wire transfers audio and video all in 1. There is only spot it can fit into, and its located right next to where you plug in the AV wire on the console. To me, the HDMI is "cleaner" looking b/c its only 1 wire.

From your description it sounds like a bad picture tube. The lines are called retrace lines. There is a small chance that a component on the small board that connects to the neck of the tube may be bad. Without model number information it is very difficult so say further. Some picture tubes can be re-jeuvenated with the appropriate machine ( at a TV repar shop)
If you feel adventurous and are careful you might try GENTLY tapping the neck of the tube and see if picture improves/goes out. If the tapping does change the picture it is definitely the tube

if there's absolutely nothing on the TV screen, then most probably the video output is different then the cables you are using (eg: video output HD and you are using AV cables). Are you sure your TV is set correctly? like using HD cable you have to choose HDMI or AV cable choose AV. Anyway, When the PS3 is on, turn it off by pressing and holding the power button on the front (so the light turns red) you will hear beep sound ( I can't remember how many but not once). This should reset the Video output to AV. Swithch to AV cables (if you're using HD). Usually if the system is set to AV output and you switch to HDMI cables, the system recognizes that and swithches to HD output. But if it's set to HD output and you are using AV cables, it doesn't switch back; that is what my system does.

that's a weird problem...looks like your scaler chip is failing...not much you can do except try using vga or hdmi converter to see if that would work...good luck

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.

have you tried using a different set of av cables?

where you put the cables for the sound and picture if you look on the end where you plug it into the xbox 360 you will see a little switch it has HD and TV on it depending on what your tv supports (HD ready TV) (normal TV) switch that switch to what TV you have (e.g. HD TV, switch the switch to HD) if that doesnt work then try checking that you have all the cables in the right ports if you have pluged the HD cables into a normal TV then this is not going to work, check cables and check the switch!