como posso consertar o lcd samsung le40c530f1w?

The problem that you are having is that you have no picture no sound and no front standby light. That can only be caused by your power board. It sounds like you have taken a power surge. If you take off the back panel and check the fuse or fuses to see if they are any good. Replace with same type.
If you put in a new fuse and it blows then there are other components that are no good. You will either have to replace the power board or get it sent in to a tv shop.
Make sure that you are getting power to tv by plugging in a lamp to wall socket also if you have a surge protector or a cord make sure they work before you take off backk panelMake sure your getting power to tv first.

flyatyou66
April 2014