Re: e701i-a3 no picture but backlights

new guy here. thank you in advance for the info and help . 70" here. tested the transistor 500 + both sides. have good reading at the silver cap on t con board-12v on power board at cable that runs to main board. when I turn on nothing. flashlight test shows nothing while hitting menu button. when I turn on power button. I see a red light on main board. that's it. nothing has tested bad or looks bad. so I'm guessing its not the "fix" as on here.where should I go next? I touched it, so now its a mission. lol.