TV is on, but not displaying picture.

If you haven't already, unplug the TV. Then press and hold power button a few times. Let sit for about a half hour after doing so. Then plug back in. If no success try these method's...

Method 1

1. Press the {MENU} button.
2. Then press the {1}, {9}, {7} & {9} buttons.
3. The Service Menu will be displayed.
4. To exit, turn the power off.

Method 2

1. Turn the power on.
2. Press the {MENU}, {8}, {2}, {0} & {2} buttons on the remote control.
3. The Service Menu displayed.
4. To exit, turn the power off.

Note: How to reset video output settings
If you are attempting to change to an HDMI cable from a different video cable or if the video output settings do not match those required for the display in use, the screen may stay black. If the screen stays black for more than 30 seconds, you may need to reset the video output settings of the PS3.

To reset video output settings:

1. Turn the PS3 system off by holding the Power button on the front of the console till you see the power light turn red.
2. Then hold the power button on the front of the console for at least five seconds until you hear a second beep to turn the system on again. The video output settings will automatically be reset to the standard resolution.

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HDMI Cable Installation

Interactive Video Tutorial

Click below for an interactive video walkthrough on connecting your PS3 to your television or display device (including HDMI).

alt="Click to play tutorial">

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Minimum Requirements

• PlayStation®3 computer entertainment system
• SIXAXISTM wireless controller (and USB cable)
• AC power cord
• HDMI cable1 (sold separately)
• TV or display monitor with HDMI port and capable of displaying picture in HD resolution
• Updated system software installed on your PS3
  Visit PS3 System Software Update to download and install the most recent version.
• TV "Input" or "Video" channel for the HDMI port
  You need to know the TV "Input" or "Video" channel for the HDMI port on your TV. For instance, if your TV has multiple "Input" or "Video" channels, (i.e., "Input 1", "Input 2", "Input 3", etc.), you will need to toggle through each "Input" channel on your TV until you find the correct channel that displays the HDMI picture. This is important to remember, especially if you do not see the HDMI picture after you connect the cable and configure the PS3 settings. Please refer to the TV instruction manual for more information.

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Instructions

1. Before you begin installation:
   • Turn OFF the PS3TM system using the [MAIN POWER] switch (in the back)
   • Unplug the AC power cord from the electrical outlet
   • Turn OFF and unplug the TV
2. Connect one end of the HDMI cable into the [HDMI OUT] port on the back of the PS3 system. Connect the other end of the HDMI cable into the [HDMI Input] port of the TV or display monitor.

   alt="line drawing of HDMI connection">
   

3. Plug in the AC power cord by connecting one end of the AC power cord into the [AC IN] port on the back of the PS3 system and the other end into an electrical outlet.

   alt="line drawing of AC power cord">
   

4. Press the [MAIN POWER] switch on the rear of the system. A red light should appear on the front of the system indicating power is available.
5. Turn on the PS3 by pressing the touch-sensitive [On/Off button] on the system front. The red light will turn green, indicating the PS3 is now turned on.
   Note: The blue light will also appear on the front of the system if you have a disc inserted.
6. Plug in the TV and turn the power on. The PS3 should detect the HDMI display device automatically. When prompted, "Do you want to output video and audio using HDMI?", select YES and press the alt="X button icon">button. (You may need to press the PS button on the center of the SIXAXISTMcontroller to enable the controller first).
7. The next screen will ask, "Do you want to automatically switch to the optimal setting?" Select YES and press the alt="X button icon">button.
8. On the next screen, the PS3 will display the maximum resolution capable on the display (i.e., 1080p). The screen will display, "Do you accept the setting?" You will have 30 seconds to confirm your answer.2 Select YES and press the alt="X button icon">button to save your settings. You have now completed the HDMI installation.

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Instructions

1. • 1 Press the "Power" button on the TV remote control to turn the Panasonic rear-projector TV on and display a picture on the screen.
     
   • 2 Press the "Menu" button. The "Main Menu" will appear on the screen. Press the "Option" button.
     
   • 3 Press the "Enter" button. The "Optional Menu" screen will appear. Press the button to select "Lamp Runtime."
     
   • 4 Press the "Enter" button and hold it for about three seconds. The "Lamp Runtime" will change to display "Time Reset (Power Off)."
     
   • 5 Press the "Power" button to turn the TV to the off position.
     
   • 6 Unplug the power cord from the electrical socket. Wait about one minute and plug the TV into the electrical socket
     

Read more: http://www.ehow.com/how_7201809_reset-lamp-timer-panasonic.html#ixzz33LeXpAsl

Hello
These are the service modes for Samsung. Check it with.
[1]
Turn on the TV on and select the input that you want to adjust.
# Turn the display off
In quick sequence on the remote press:
{MUTE} {1} {8} {2} {POWER} buttons.

# The TV will turn On with the Service Menu displayed.
ADJUSTMENT - TEST PATTERN - SET OPTION BYTE - FACTORY RESET

# Select the function and use the {VOL+} button to enter.
# Save settings and exit by pushing {MUTE} twice then {POWER}.
[2]
With the TV in standby, press the {INFO} {MENU} {MUTE} {POWER} buttons on the remote.
The TV will turn On with the Service Menu displayed.
Press the {POWER} button to exit the Service Menu.
[3]
With the TV in standby, press the
{DISPLAY} {P.STD} {MUTE} {POWER} on the remote.
The TV will turn On with the Service Menu displayed.
Use the {CH+} {CH -} buttons to select items.
Use the {VOL+} {VOL -} buttons to adjust.
Press the {POWER} button to exit the Service Menu

Turning the Display On and Off
There is a power switch on the bottom of the display and a power button on top. The power
switch is used to cut off power completely, whereas the power button turns the screen off but
allows the remote to continue working.
To turn the display on:
1. If the power light on the front of the display is off, turn on the power switch on the bottom
of the display.
2. Press the POWER button.
To turn the display off:
1. Press the POWER button.
2. If the display will be unused for an extended period of time, turn off the power switch on the
bottom of the display and disconnect the power.


Allso go here for full manual:

http://www.retrevo.com/search/v2/jsp/mytrevo/myTrevo.jsp?page=man

just spoke to Samsung support and it turns out that the freeview tuner had froze and needed resetting. To do this put TV on standby and then push in series these buttons on the remote: 'info, menu, mute, power' the TV will then turn itself on and display a menu. Press the 'down arrow' untill you've highlighted option 12 - 'reset' and then press the 'right arrow' to enter the option. TV will turn off and when you turn back on it will start in 'plug & play' mode as if new. Set the time and country options and then it will perform a complete scan. I've just retuned mine and all back to normal. Hoorah!!!! :-)

power inverter board is dead.
need a new one.

Try pressing the TV/Video button. The problem could be that the TV is set to an input with no source.

Had the same thing today. Iwas playing with the auto demonstration of on screen displays. Press and hold the power button (5 seconds) on the TV. The auto display will play. Press the power button again (TV will go off). Turn power on again. you should now have the picture back