When you try to turn the TV on, it makes a switching sound, the on/off red light flashes back and forth, but it never turns on. Then, it keeps on making the switching sound no matter if you don't press the turn on button anymore.
It is like turning on and off right away.
I had this happen. (ontop of the button board infront shorting out). I took the back off, and if your looking at the screen it'll be on your right. There is a metal box with two ribbons coming out of them, I unplugged both and plugged both in, and now she turns on without any issues. Not sure why, but it works. Now if I could get some help finding the circut board with the front buttons on it. I.e channel up down and volume.
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Only if you have a source button on the tv itself. On many of the newer sets you have to have the remote to access your other inputs. Without the remote, nada. And forget universal remotes - they only provide for the most basic functions and video source is not one of them. And you get hosed on original remotes.
Any malfunction associated with a flashing light usually indicates a
circuit problem or defective component. Unfortunately, the days of
taking off the back cover of your TV and replacing a defective tube or
fuse are long gone. Proper servicing will require troubleshooting
procedures that can only be performed by a qualified electronic repair
facility or professional television repair person. Ask for an estimate
and a realistic appraisal of whether the set can be adequately fixed.
Depending on the age and condition of your TV it may not be cost
effective to repair.