Question about Televison & Video
When using coaxial, video or component the screen or displayed picture will jump slightly but constantly. I switched to the hdmi input after the issue started, no jump to the picture but a different issue developed. After about a week of using the hdmi the screen started to develop an issue with the horizontal and vertical pieces of the display. Such as, the screen will occasionally have a 1-2" blue strip at the top. The screen will also split down the middle and half will twist and scatter different from the other half. The entire time this happens the screen or transmission is visible. After powering down and turning the set on almost immediately it will correct the issue but only for 15-20 minutes or less. I suspect since the main input and the hdmi input boards are separate that the issue might be a power supply, can anyone give me some guidance. Thanks
my 42 also went black, and the "vizio" logo in front indicates as if it is turned on, it clicks on and off, but just has no output on the screen, meaning not a black screen, just a dead, no image, even when the system has clicked on
I tried turning off, on, unplugging, letting it sit (kind of like a reboot wishful thinking), removed all connections in back, (nothing still, not even the blue screen) just nothing.
What a shame, I had the unit less than 6 months, and now this? I have work to do, and I can't get it done.
Posted on Mar 23, 2008
SOURCE: I have a Samsung LE37R74BD
Have the power supply checked for faulty puffed up capacitors. You are expriencing low supply voltage to the main board.. There could also be a thermal intermittent on the main board or the TCON board. But for the most part this symptom is related to the power supply.
Posted on Dec 08, 2010
This TV is known for powersupply failures and this can be effecting the incoming voltages into the mainboard (AKA tuner board). This would cause the noise. Please have someone look into the powersupply and check that the proper voltages are coming from it. If they check out ok, you need to replace your mainboard.
Please rate if this helped :)
Posted on Mar 30, 2011
SOURCE: Having an issue with a
After replacing the main board, you have to do some service adjustments to it. It is a skilled work indeed. You must have it schematic [service manual] to do the work. All adjustment should be done is in it. Without making that adjustments very keenly, the other boards won't accept the new main board. OK.
Posted on Sep 21, 2011
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