I got a UN55B8000XF Samsung That is not Showing an image on screen nor does it have backlights.
When the tv is turned on i get the "Samsung" chime and can get audio via HDMI, also the red optical audio light does turn on, and the Standby light stays on and will take commands from the remote control. But no Backlights and No Image displayed(checked with flashlight). Disconnecting the TCON makes no difference. I have suspected the mainboard because when the mainboard is disconnected from the PSU the Backlights DO turn on. There is a repair kit for this PSU that has similar symptoms but not exactly the same. I have checked the output voltages from the PSU and can post all of them. Now for pin 1 the "Power On/Off" i only get .81 volts when the TV is on and of course 0 when its off. Is this normal? To me it seems to be low. Also get 12v on the Tcon fuses. It would be nice to know a testable Point of Failure, any ideas?
When the tv is turned on i get the "Samsung" chime and can get audio via HDMI, also the red optical audio light does turn on, and the Standby light stays on and will take commands from the remote control. But no Backlights and No Image displayed(checked with flashlight). Disconnecting the TCON makes no difference. I have suspected the mainboard because when the mainboard is disconnected from the PSU the Backlights DO turn on. There is a repair kit for this PSU that has similar symptoms but not exactly the same. I have checked the output voltages from the PSU and can post all of them. Now for pin 1 the "Power On/Off" i only get .81 volts when the TV is on and of course 0 when its off. Is this normal? To me it seems to be low. Also get 12v on the Tcon fuses. It would be nice to know a testable Point of Failure, any ideas?
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