Hisense SmartTV Sudden High Pitch Noise
Hey everyone,
I’m dealing with a strange noise issue with my two year old Hisense TV and I'm hoping someone here has diagnosed something similar before. My wall-mounted TV is making a strange noise every 20 minutes that starts as a loud high-pitched squeal and then slides down in tone, almost like something is powering down or losing air. I’ve already checked the wall mount and the sounds doesn't occur when the TV is unplugged so I’m sure it’s not the hardware moving, so it seems like an internal electrical issue. Since it happens so consistently like clockwork, I’m wondering if this is a sign that a part in the power box is failing or if it's just the TV's internal parts reacting to heat. Has anyone dealt with this kind of "whine and pop" cycle before, and is my TV about to die?