Chosen Solution
When I turn on my 32" Polaroid TDX-03211C, the screen slowly goes black after about a minute or 2 from one side to the other. It starts out with blackness around the edges. Update (07/22/2020)
Theres the back of the TV with the AV inputs being on the bottom.
Closeup of the bottom board
Closeup of the top board
This is underneath both circuit boards. The top is on the bottom and the bottom is on the top.
Hi, It seems as though there may be a problem with the backlighting. It may be the inverter that supplies the power to the backlight CCFL tubes or the backlight tubes themselves. I say CCFL tubes as searching online for the model, indicates that it is a LCD TV and not a LED LCD TV i.e. not LED lights backlighting. Turn off the TV and disconnect the power from the TV and then check the power board or maybe a separate inverter board (look for 2 or 4 wire cable going into the screen area somewhere) for bulging or domed capacitors. If you spot any, they are faulty and will need to be replaced. The specifications are on the component itself. Look for uF, (capacitance value in microFarads), wv (working voltage rating) and temp (usually 105C - 105 deg. Celsius). Search online using the specifications to find replacement part suppliers. Be safety aware. Always disconnect the power from the TV when working in the back as there is exposed lethal AC voltage on the power board when the power is connected to the TV, even if the TV is not turned on. If you cannot see any obviously faulty capacitors then perhaps the backlights themselves maybe failing.
