This is a Chinese clone or re-badge despite the JVC name.
No image or sound. Nothing visible with the flashlight test. Tried accessing HDMI ports and playing a movie with no signs of audio output. Voltages on power supply seem to come up OK. The LED tell-tale on the front of the TV reacts to remote button control and goes from red to green in an expected manner.
The LED backlight voltage gives a clue. At initial power-on it is sitting at about 35VDC. Then it briefly goes up to about 150VDC (about what I'd expect) before quickly cascading back down to ~35VDC.
So, do you reckon I have failed LED string in the panel? If so, why can't I see an image with the flashlight test or get some sort of audio output via the HDMI port?
There is secondhand mainboard available for sale but I'm reluctant to invest in that if I actually have a defective panel.
No image or sound. Nothing visible with the flashlight test. Tried accessing HDMI ports and playing a movie with no signs of audio output. Voltages on power supply seem to come up OK. The LED tell-tale on the front of the TV reacts to remote button control and goes from red to green in an expected manner.
The LED backlight voltage gives a clue. At initial power-on it is sitting at about 35VDC. Then it briefly goes up to about 150VDC (about what I'd expect) before quickly cascading back down to ~35VDC.
So, do you reckon I have failed LED string in the panel? If so, why can't I see an image with the flashlight test or get some sort of audio output via the HDMI port?
There is secondhand mainboard available for sale but I'm reluctant to invest in that if I actually have a defective panel.
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