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I have sound on my tv but no picture
This sounds like the back-lights have quit working. This is made up with
an inverter (ballast) and fluorescent lamps. I want you to try
something. In a very dark room turn the tv on and watch what happens to
the screen. There is three things that can happen. first the screen will
stay completely black. This means the inverter never fired, and this is
usually a failed inverter, but sometimes the power supply may fail.
there is also a rare time the main module never outputted the signal to
activate the inverter, but this is rare because you can hear the audio.
So obviously the main is working at least 90%. The second thing that can
happen is the screen will light for a split second then go black. This
usually means that you have a bad lamp. These lamps are physically
locate inside the LCD panel, and the replacement cost exceeds the price
of a new unit. You may even see a dark area in the screen. The slight
glow will not be uniformly lit through out the screen. Finally the last
thing you may see is the screen has a slight glow. This means the
back-lights work, but the video portion isn't showing. This usually
means the driver board (T-con) has failed. This is probably not
available separately, so you must replace the panel to fix it. And like
before, the replacement cost exceeds the price of a new unit. One more
thing to do when the set is on and in the very dark room if the screen
is black, point a very intense flashlight into the screen. Put the
flashlight against the lcd screen and see that you have video moving
around the glow of the flashlight.
on Sep 12, 2012
Rca 22la45rqd no picture
Check the picture settings like brightness, sharpness, contrast and color. Change input device to something you know works for sure. Look for any loose contacts in RC jacks. If problem persists, it might need attention by a qualified service technician.
on Jul 23, 2012
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