Why is it going black every 3 seconds then back on in 3 seconds?

LG LED TV has no picture (black screen) but still sound ...

www.tomsguide.com/answers/.../led-picture-black-screen-sound-fixed.ht...

7 days ago - My 32' LG LED TV has suddenly lost picture! The sound is all right but theScreen is pitch black. After switching it on the picture flashes for a second and thenthe ... LG LED TV has no picture (black screen) but still sound - can it be fixed? Tags: ... a touch on the screen reveals nothing so it's not the back light.

Monitor going black after 2 seconds [Solved] - CCM.net

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Oct 9, 2012 - Brightness goes down, display draws less juice, and you can at least use .... it's the LCD's Inverter ... you have to replace it for it to go back to ... If the screen is turning off every two seconds or so and then it comes ... i turn my tv on it comes right on, but then after a few minutes turns off, .... Digital Trends for LG. No display in monitor
Jan 11, 2013
Ps3 and hdmi cable
Oct 8, 2012
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TV with Black Blank Screen Repair How to Troubleshoot ...

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https://www.youtube.com/watch?v=kFdVi2ejfzA

Go into the Catalyst Control Center and check "reduce DVI frequency on high-res displays" and leave "Alternate DVI operational mode" checked. This should resolve it. It is because of your video card that this problem is occurring. Let me know if you need additional help or if this doesn't fix your problem. Good Luck.

two in the harness running back through to the fuse block and one (black)should be bolted to the frame back there somewhere. Good luck!

You've got it, one of the circuit boards has one or more failed capacitors.

If you decide to take it apart, check for capacitors with either a bulging top or a yellow stain underneath on the board itself.

Befored taking it apart, because you will, even if just slighty, damage the screen case, check your warranties. I had one pop recently, it had a 3 year - return to base warrany.

Ok try this, at boot up press F8, when the Menu comes up, choose Safe Mode, but this time instead of going to the desktop, choose System Restore, follow instructions, and when the Calender type window comes up, simply choose a time BEFORE, the time it went faulty. This should completely restore you to working again. As long as there are NO other problems.
support.microsoft.com/kb/306084 -

hi my lcd AL1916 acer monitor keeps going black or loosing signal after 2 or 3 sec. i press the moon on my keyboard 2 times it comes on then off again please help

The lamp is going bad. Very common for some Sony to do exactly what you are describing.

I have the same monitor and it is only 3 month's old, the power lock button continues to fail and they have replaced it 3 times with the same issue, What a piece of ****!!!!

HP's are known for bad capacitors in the power supply.
Replacing them is simple if you know how..not so simple if you don't.
Try your local TV repair centre. It should not cost alot to have the capacitors replaced.

Hope it helps =)

May be your IP board is going out. Replace IP board.