Turn set on picture for a few seconds then it

The input signal is missing and the blue screen background comes on the screen. Change the input to some other device which you are sure works and see.

This is definitely a problem with the LCD controller of the tv or the LCD panel itself. However if I were you I would hope that its just the controller(which costs about 50$) and go ahead with the replacement to see if that resolves the problem

Look at the remote for 'ASPECT', 'ZOOM' 'PICTURE SIZE'. 'FORMAT'.

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

You need to do some inspection inside.
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://s807.photobucket.com/home/budm/allalbums
Parts: www.shopjimmy.com

SK-26H520S 26 in. HDTV LCD... Answer Failed: retry The tv turns

Hello, two things, one if the unit gets stuck there meaning that the W stays there and it shows that on the screen thank your main board is stuck on the boot mode and you will need to replace. The second is if the W goes away than you need to see if you can plug something in and change the input mode (even if you can't see anything on the screen) so that you can see if there is any sound coming in to the unit. If this is the case than you are looking at dead inverter board. If you would like to further troubleshoot than please email me at [email protected] for further assistance. If this information was useful please rate me on this webpage.

There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

Your tube is failing.

Sometimes if you just press on your overscan button on the remote and make the picture a little bigger or smaller the humming noise and freezing of the picture will actually stop.

power supply if led ligth stays blue and then after a few minutes changes to orange is your power supply.if light color goes to a purple that is your mainboard $$$$$$$$$$$