Question about Vizio M550SV 55 in. HDTV

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No imaging, have sound, backlight, etc.

Vizio M550SV Problems: 1. No imaging (picture) 2. Has sound 3. You can see backlite is working when you turn tv on or change input selection. Vizio Emblem lights up as well.. Tried so far: 1. Replaced Main board 2. Replaced Power Board At this point Im not sure where to turn. Could I have gotten a bad main board? Could it be the actual screen itself and not the boards? Thanks in advance for any help. Thanks Greg Baldwin

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It may be an input cable problem. Check hdmi and or coax cables to make sure they are not damaged . If you have another tv hook cables up to it to make sure they are working. Hope this helps.

Posted on Dec 31, 2013

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Posted on Jan 02, 2017

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SOURCE: Orange light is all I get.

99 percent its the mainboard not the powerboard, especially if you have amber led. The mainboard swap is pretty simple if you can get the parts.

Posted on Jul 19, 2009

  • 27 Answers

SOURCE: Vizio VX42L LCD TV died?

it is the power supply. in the given scenario like yours, the PSU is the suspect in 90% of the cases.

Posted on Apr 09, 2010

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SOURCE: my vizio gv42l fhdtv 10a picture flickers like a

you need to check first the power supply board whether the output supply 12-24vdc for the inverter board is stable and not can measure the output voltage with a get a voltage output of 12-24 with the inverter board is connected or loaded to the carefull of the high voltage at the inverter board..once the output is stable replace the inverter board or you can measure the output of the inverter be very carefull..the output range upto carefull..if the high voltage is stable replace the lamps...tnx and good luck..

Posted on Jun 03, 2010

Testimonial: "Thanks again. :)"

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0ne of 3 has failed:
(in order of probability):

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1 Answer

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Hello tbdbitl, First I want you to check all of your inputs, to make sure you have proper connectivity. If your connections are good, then you may have one of two problems which are: 1) defective backlight 2) defective power supply inverter In both of these cases you will need to perform one test. With the TV in a dark room, turn it on and using a flashlight look at the screen and see if you can see an image, if you can see an image then the problem is either in the inverter or the backlight. In either case you need to have this looked at by a qualified TV technician, because these parts are not user servicable. I hope this helps, Thank you, Shuttle83

Jun 09, 2009 | Vizio L32 32 in. LCD HDTV

1 Answer

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Hi bnkbaker, Sorry to hear your having TV problems. We need to check your backlight inverter, While your tv is on and you can hear audio(sound) take a flashlight or a lamp with a bare bulb and shine it on the screen, look very closely at the screen and see if you can see a video image. Let me know what you find and I can assist you further, please rate this solution. lone99star

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