When i turn tv on the power button shows its on but no pic or sound

On the remote control to that tv, after the power is turned on, find and push the input button untill you have a picture. The input button switches where you are receiving your signal from, cable, component, video 1, vedeo 2,,etc,,,.
Hope this helps

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.

When convergence amplifiers blow TV will not turn on and also usually needs new micro fuses 4-6 of these as well as the convergence amps. Lots of meter checks and soldering

Get another TV the brains are fried.

Need to have the power supply rebuilt, expect to pay around $350 Julio at [email protected]

YES IT IS FIX ABLE LOOK FOR A SONY SERVICE CENTER, CHEAPER IN LONG RUN. COUNT THE FLASHES IT SHOULD PAUSE AND BLINK AGAIN FROM LIGHT ON FRONT. DIAGNOSTICS FOR THE TECH.

This problem is either the TV's software or how the mainboard is distributing power so instead of just unplugging the TV, try a power drain:
1. Unplug the product's power cable so the device is not grounded to the house. 2. Press and HOLD the product's own power button for 1 minute to drain the capacitors. 3. Plug the product back into a wall outlet and try to turn it on.
Note: This procedure works with battery operated devices as well so remove the batteries and hold down it's power/on-off button.  Electricity can remain in capacitors and on circuit boards enough to prevent normal functionality. By clearing the residue electricity, your product will have a fresh start and many times this will resolve a buggy or non-responsive device that appears to be dead.
Since hardware either works or it doesn't, your issue is either software or power related since you can get it to work so hopefully the power drain will indicate further.

id take it and have it repaired. people on here can tell you what they think it is but no one knows for sure what is causing the problem. a repair shop can guarantee the repair.

the on light bleek but it show no picture

same as ak_medic