Instructions
Verify that your television is on the correct channel. For example, if your PlayStation3 cable is connected through your Video 1 input, monitoring the Video 2 channel will not let you see your PS3 display.
Hold down the power button for five seconds. If timed properly, you will hear two beeps; the latter beep resets the video output, which may fix the display problem.
Connect your PS3 to another television. If the display works, the original television may be having problems. If it continues to display no picture from the PS3, some other component is the problem.
Connect your PS3 to your television with another cable. If the display works, the original cable may be broken. If it continues to display no picture, some other component is the problem.
Check the PS3 video port for damage. If there is any kind of damage, you must send the console to Sony for repairs.