When I power up the unit, it says "unusable video signal". The audio comes on for a brief second when it powers up, but then shuts off. I still have access to the tv menus and such. It says this for all video inputs and video signal types. I have tried everything from composite video, to hd video (xbox 360) to even trying to use the built in tuner with coax. No luck. Is there a particular board that has this issue? I have seen this problem on forums over and over, but have never seen a definitive answer, other than, keep re-powering tv till it works... That worked for 6 months or so but got worse over time.
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Hi, Check the cable connections to and from the TV. Change the channels to see if there are others that are out. If you are not using any cable company then you will still need a set top box to unscramble the digital signal. Good luck.
This is a very common problem with these models.
The problem is very likely a fuse that has blown, if the following is true:
No Video on any input BUT HDMI and
No Audio at all.
Purchase a fuse, these are freaking tiny from digitalkey.com or mouser.com F1455ct-nd
Pull the back off of your unit Pull the cover off of the PCB housing. It is the box that contains the hook ups including the cable tuner. The silver box that you screw the cable to is where you begin to look for this fuse. About two inches behind this silver box is some numbers printed on the board 7c32 and partially obscured will be 1c33 Using a big magnifier look next to the numbers listed above, you should see a tiny rectangle fuse with an F on it. This F fuse is a 500ma fuse that is too small for the load The fuse listed above will have a G on it. It is a 750ma fuse. Call the repair shops in your area, tell them that you know the problem, have the part and you want to know how much the bench time and labor will be to repair your unit.
What is your signal source, OTA or cable? Did lightning or another type of power surge recently hit? Make sure you have the TV on the desired input.
If OTA check your antenna direction and that you have the Channel Setup (from the menu) set to Antenna. Also check if you have the right antenna to get stations in your area. Antennaweb.org gives the most likely channels and directions. tvfool.com will give more detailed information and more stations. Both sites assume outdoor antennas but the direction information is always good. Look for new construction or big trees that might block the signal. Do you have multiple TVs sharing the same antenna? You might need an amplifier.
If cable, check the Channel setup. Check for someone recently damaging your cable installation (cutting the wires, trying to split the signal to get it for free) Splitting the signal to multiple TVs may also be an issue, get an amplifier of the correct type. Some cable systems may require a bidirectional amplifier.
If you recently had a power surge, see if the TV works with other inputs. Tuners can be replaced if the TV is worth the labor costs for you.
I hope this helps.
Cindy Wells ( My household had three tvs and a digital to analog converter that lost
their tuners after a nearby lightning strike. We chose to replace the
TVs since two were over 15 years old and the third was also out of
Sorry but you are out of luck, the unit will need repair. It could come
back to life in any moment but most often is related to this:
My previous post here
I have seen a faulty board work perfectly until the power is removed (intentionally or accidentally) an applied again or reset via the power button for 5 seconds. This will effectively disable the +12 VDC Power oscillator rendering the TV unusable.
Ok. PCB means Printed Circuit Board.
It looks similar to the picture down below. A part must have gone bad on your PC board. So, the RCA shop ordered a replacement PC board to fix the problem. It's an interchangeable part. All newer TV now have PC boards, which each one hold a different function.