TV not responding once on and won't turn off
I have a Samsung UN48H5500AFXZA.
It recently stopped working and I tried replacing the main board without success.
Original main board - it will turn on via remote or button. However, once on it is unresponsive. Backlight is lit up but trying to do anything (changing source, channel, volume, etc.) does nothing except the light on corner of TV will flash showing its receiving signal from remote but nothing happens. The TV will also not even power off via remote or button. If on, it will only turn off by unplugging.
New main board - when using remote or button to turn on, the screen lights up 1 second and then it turns itself off. It won't stay on longer than that brief flash of 1 or 0.5 seconds.
Any ideas?
Thanks
DW
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