Blank screen 42LDF30UB

Need a new power supply unit.

If you wish to get some details; visit the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
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Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

http://www.badcaps.net/forum/showthread.php?t=25029


http://www.badcaps.net/forum/showthread.php?t=25029

This camera requires service.

Answer depends on the Brand and model number of the set for a answer.

Usually when these develop a fault you will get flashing LED codes. If you are not getting any the power supply may have failed completely.

Try another cable and socket in the first instance and ensure the manual power switch feels normal in action.

thats pretty normal, it takes a good second or two to warm up and the display to turn on(at least0, you get the green flashes as you hold for on, 1 sec is a long time at times, lol, be patient, no problem with your tv!

I had a similar problem with my HANNSLounge 32", the screen switched on with green light but none of the front panel buttons worked (screen is black apart from showing the input source in the top left).
After powering off numerous times I tried starting up with a blank SD card in the reader and the tv cycled between red green and blue screens and then reset itself. (Some sort of firmware restore?) After which point I had a working screen again! (Will have to see how long it lasts for!)

SYMPTOMS loadTOCNode(1, 'symptoms'); Three lights flash red on the Ring of Light (RoL) on the front of your Xbox 360 console. The upper-right quadrant light is the only light that does not flash red. Back to the top
CAUSE loadTOCNode(1, 'cause'); The three flashing red lights may indicate that there is a hardware problem with your Xbox 360 console. Back to the top
MORE INFORMATION loadTOCNode(1, 'moreinformation'); If you are experiencing this problem, you can submit a console-repair request online. However, before you submit your request, first try the following two steps to verify the problem: 1. When you turn on the console, look at the light on the power supply. The power supply light should illuminate green even if the three lights on the Ring of Light flash red. If the power supply light is not green, please follow the steps in one of the following Microsoft Knowledge Base articles: 906101 (http://support.microsoft.com/kb/906101/) Troubleshooting your Xbox 360 Power Supply when the light is red 906102 (http://support.microsoft.com/kb/906102/) Troubleshooting your Xbox 360 Power Supply when the light is orange 906103 (http://support.microsoft.com/kb/906103/) Troubleshooting your Xbox 360 Power Supply when the light is not illuminated 2. Turn off the console. Wait 10 seconds, and then turn on the console again to see whether the problem re-occurs.If your console continues to display three flashing red lights, your console may have to be repaired. If none of these help, pease contact Xbox support at http://xbox.agent.asahost.com/ to talk to a live agent.