Shine a flashlight at the screen at an EXTREME angle from closeup and see if you get a "ghost" image of a picture. If so, you've energized the unlighted pixels to reveal what the picture should be (the picture's still being "sent" to your TV, you're just not seeing it). If you've been able to do this, the problem is likely the "power supply board", a pair of circuit boards that supply power (obviously) to the television. Even though only one board is likely bad, these circuit boards MUST be replaced as a pair. The price varies, I bought a pair for less than $40 delivered, and they took under 30 minutes to remove the old ones and install the new ones. And I am NOT electrically inclined. Basically, you remove the back cover, locate and remove protective covers, unplug and unscrew boards, install new boards, plug the power strip back in, replace cover, replace back. It's actually as easy as it sounds, but BE CAREFUL about unplugging the power ribbon. Some just "plug in", some are locked in with little clips. YMMV. The BEST thing to do is, take the TV and GENTLY place it screen down and remove the back cover. LOCATE the power boards (usually on the left and right sides of the circuit board) and remove any protective covers (plastic or cardboard, usually). Look at what's involved in removing them and think if you want to take a shot. If you buy the replacement boards and that didn't fix the problem, you've still spent less money than had you paid for an estimate for repairs. The odds are, any other problem costs more than the TV is worth. And don't forget to Youtube.