Question about Vizio XVT473SV 47 in. LCD HDTV
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Posted on Jan 02, 2017
this could be one of two problem. first, check if you have back light. If you do then the problem is with the M/B. Second, if you don't have back light then the inverter is bad and needs to be replace.
Posted on May 20, 2009
I had this exact problem on my Vizio 47" HDTV. I removed the speakers and all the screws on the back cover. Took the cover off and located the fuses on the largest circuit board. The are in the upper right hand corner of the board. There are 3 of them in a row labeled LF 1.5, LF 3.0 and LF 3.0. The are white in color with copper ends. I took a volt meter and measured continuity across all fuses individually and found the LF 1.5 to be blown. The guy at the electronics store sold me a barrel 1.5A fuse and told me to soldier it across the top of the blown fuse. It took an extra set of hands but the TV works perfectly.
Posted on Jun 23, 2009
There is a part inside
the TV that needs to be replaced. If the TV is under warranty—whether
the original warranty from the manufacture or an extended warranty
purchased with the TV—call the company providing the warranty
coverage and they will arrange to have your TV repaired at little, or
no cost to you.
Since some brands will pay for your repair even if you're out of warranty, especially if they've heard of your problem before and it's a known issue. You should always contact the manufacture first for your full range of options. If they're willing to fix the TV for free, or at a reduced cost to you, let them!
If the TV is out of warranty, and you have the experience and you know what you're doing, you can fix the TV yourself. Purchase the service manual from the manufacture to get started. However, if you've never done anything like this type of repair before and you don't know where to start, I suggest speaking with an experienced TV repair-person.
If you decide to pay for out of warranty repair by a professional repair shop, the total cost will likely be a minimum of $200 parts and labor. However, be warned that the cost could be considerably higher.
I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today!
Please post a comment if you need additional assistance so that I can help you further.
Posted on Jan 11, 2010
Testimonial: "it was helpful thank you do you happen to know what this part is?"
That white line (usually jagged) is actuallly part of the transmitted picture. However, you are not intended to see it because it is located in what is known as the 5% overscan area. Your TVs today are more than just cable ready... they are a versital, technology filled multimedia display. You can see that line because the screen size or wide mode you are using is intended for 1080p/24 signals. You have 0% overscan with this screen size setting. This allows you to see ALL of the picture, including portions of the picture the broadcaster did not intend for you to see. You can change your screen size using the Wide feature in the Setup menu. See pg.62 of your user manual for details and descriptions of the various wide modes.
Posted on Mar 14, 2010
LCD TV's don't have a bulb. They have backlights (usually compact fluorescent tubes) and a panel of LCD pixels. So you can have one of three things fail: the video board, the inverter that drives the backlights or the backlights themselves. If the problem happened suddenly the inverter is more likely to have failed. As the backlights fail, the screen slowly dims or the image will become pink/red. Look closely at the screen, if you see a dim image then the backlight has probably failed (block the room light but try looking with a flashlight from a few inches away from the screen). If you see nothing, the inverter or the video board are more likely suspect.
For an out-of-warranty TV, open up the back of the TV and remove the shielding. Look for any scorch marks or bulging or damaged capacitors. (Sometimes other parts will fail on this part but these can be spotted easily. Capacitors look like cylinders on a tripod.) The scorch mark and smoke may indicate a resistor or zener diode that had been used as a fuse and is now gone.
If you borrow (or have a) high-end multimeter (able to measure high frequencies - 50 kHz) or an oscilloscope, hold the multimeter probes a fraction of an inch apart about an inch above the inverter board and power up the TV. If you see a 1 or an actual value, you have a good inverter. If you see a reading near 0, the board is bad or the multimeter can't resolve the frequency.
In either case, you can buy a replacement inverter for $50-150 and just do a simple swap. Disconnect all of the wires (connections are similar to molex and ribbon cables in a computer) and remove board (a few screws usually). Connect the cables to the new inverter. (If you google backlight inverter replacement, you'll find videos and text descriptions.) Note the part number on the board, including the Rev number, and order the exact one (shopjimmy.com or lcdparts.net are good starting points). Universal inverters do exist but can result in reversed controls (up to lower the brightness). Replacing individual parts on the board is cheaper but more prone to not tracking down all of the bad parts.
If the inverter is good, then it's probably backlights themselves (several in most TVs). These are sandwiched on the perimeter of the TV (usually under some tape that holds the lamp, reflector and other parts together. You need to order by length and width and get ones for your TV size. Separate the panel from the bezel. Remove the tape, and separate the reflector (make a note of how things are put together) then you have to Dremel (or use another rotary tool) to remove the plastic to get the backlight out. (They are often molded into the frame.) Then put in the new backlight and reassemble everything. (http://www.lcdparts.net/howto/default.aspx) but for an overview: http://www.inventgeek.com/Projects/BacklightFix/overview.aspx Then push the new backlights into place, reconnect the wires and close up the sandwich of tape and other parts around the screen. Then replace it in the bezel.
With a good spare backlight, you can test an inverter for condition (plug together and turn on the tv while the box is open). Similarly a good inverter can test the backlight.
I hope this helps.
Posted on Sep 22, 2010
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