Samsung le40 we have a black screen and a flashing red indicator light. we are unable to turn it on.

Cheaper to replace than fix, trust me on this.

No Both are not interchangeable.

Gopakumar Gopalan Google

Nope. It appears that you now have a main power supply issue since the set is dead.

The front panel LED light indication "LAMP" flashes?Change the the tv projection lamp or LED lamp first,see what happen?Than go from there?Tvs with "LAMP" LED indication light flashes,tv 1 1/2 or 2 years old use like 4 or 5 hours a day.The projection or LED lamp or bulb,inside life span is over.Require changing LED lamp or projection bulb.

Make sure properly connected and tightly sure cover put on and screws in,if change projection bulb,still blinking "LAMP" LED indication light.But,if "LAMP"LED indication flashes and making clicking noise.Ur Ballast board also dead.Require replacement,this Ballast board help to ignite the projection bulb.

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

samsung tv le40 red light flashes but tv doesnt go on

MY PHONE ONLY DISPLAYS A WHITS SCREEN AND A PICTURE OF A BATTERY WITH A RED LINE CROSSED THROUGH IT WHAT DOES THIS MEAN DO I NEED A NEW BATTERY OR ? HOW DO I RESET MY PHONE ?