I have a Westinghouse model SK-26H520S tv that has started turning on at odd hours of the night and day. All timers are set at "0".

Check its speakers.

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.

It may have bad T-CON board or the bad DC feeding it. You need to check the DC voltage feeding it.
http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

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

Check to see if you are getting 12vdc feeding the T-CON board. the gray glowing means the backlight is working.
If you are going to DIY and have proper tools and know safety precaution then please read on:

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

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

You need th check th epower supply module, that will be the first place to look, look for bad solder joints, bad leaking/bulging caps.
Parts:
http://www.shopjimmy.com/catalogsearch/result/?q=Westinghouse+SK-26H520S+

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

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.

Vertical color scan has an open or short..............it could also be a ground problem with in the V-color scan circuits...

If you tap the tv and the color bar is gone then its a ground problem with in those circuits above. Needs a solder re-flow and check the condition of ribbon cables.


CWR

The power to the TV may be perfect but the supply in the Tv that provides power to different areas may be bad and need to be replaced. there could be a bad capictor in the power supply that is cause.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620