Chosen Solution
why my samsung le40r51b is not turning on?i change main board because voltage going to main board is not stable,its going up and down. Even i change tcon board.Now power board only left to change,is that the power board problem?
Pritam yakha it appears that you should have changed the power board first. Your description as for why you replaced the main board sounds like a power board issue. It is the only board left so go ahead and change it. Let us know how it all worked out for you.
