“My tv will turn on when plugged in, but after 10 seconds, after the Toshiba startup screen it just turns off and wont turn back on unless unplugged then replugged, only to do what i just stated again.”
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I replaced everything! All cables and All boards! Same thing! Do not buy any parts. Does the same splash screen and goes back off. Been to a lot of sites where nobody was able to fix it. I think it was a Chrome cast update that bricked the TV. Lot of user from 11/19 to 4/15/20 have the same issues. With the cost of power board or main board lots of people have just bought a new TV. I paid $100 for ALL the components from a broken screen 55L621U. Tested each component as I switched them out (even pwr/imput button, wifi, 3 boards, and all wires) to no avail. Power on splash screen the black screen and power off. No support on this one. Best Buy 389 for a new one.
Sorry, there was a problem. Please try again later.They sell the power boards everywhere. $70 bucks. Very easy DIY fix.
Sorry, there was a problem. Please try again later.Sounds like you have a bad power supply board and this model 55L621U has been discontinued! Good luck in finding one.
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