Question about Samsung LE40R73BD 40 in. HD-Ready LCD Television
Under each of the plastic buttons on the set there is a tiny push switch--the plastic button activates it---it is a momentary switch and when the button is released it should stop its function.
A lot do not--fail: vol up is worst but can be any of them. The way to prove this is get at that switch (vol down in your case) which is usually on a small circuit board---unsolder the two pins for that switch and remove it.
If problem gone you know what it was---you really do not have to replace it as the remote should duplicate all functions of these switches---in some cases the remote will not control or stop this---front controls have priority over the remote.
Posted on Dec 08, 2012
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Posted on Jan 02, 2017
do this test, turn tv on and touch the screen if you can see light in the background it is the panel if no back light is present then it is the power board.
Posted on Mar 15, 2008
0ne of 3 has failed:
(in order of probability):
1. Backlight inverter
2. Power Supply
Please seek the expertise of an experienced TV repair technician - as they contain potentially lethal voltages that must be properly discharged before work can begin.
Posted on May 27, 2011
Most likely you will need to get a diagnoses done on the set. It could be a faulty 24vdc circuit (power supply capacitors), defective inverter, or a failing CCFL backlamp.
Posted on Oct 29, 2012
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