May 16, 2018, 6:52 AM
Post #1 of 5
Purchased UN65KS8000FXZA TV 1.5 years ago (Dec 2016), worked great until just a week ago. I was watching TV and screen just went blank without touching anything. When I tried to turn on, the red LED will briefly turn off, a brief flash of backlight, red light comes on for a few seconds, red light goes off, and then continues with cycle of backlight flashing, red light coming on, red light off, etc.
Samsung 65 LED UN65KS8000FXZA won't power up. Red light cyclesg
Since this is out of warranty, I looked into the problem and based upon symptom, it was suggested main board problem. Got a replacement main board and replaced but still same problem. Replaced the power board, still same problem.
Disconnected LCD & LED panel and speakers so it is not dragging down anything but same problem. I have 13v at power supply but after 4 seconds, voltage will dip down to 7 volts for a second and then back to 13v. This does not happen after I remove 2 cables from power board to main board. Seems like main board problem but that has been replaced already.
The only thing left is remote sensor / LED status light, can this go bad and cause the problem? Don't know how to check that.
Or, can this be some kind of software update that went wrong. If that is the case, how can I reload given symptoms?
(This post was edited by aspenpup on May 25, 2018, 3:58 AM)