Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
Follow up for anyone looking to do repair themselves. The repair ended up being the control board (green circuit board). Because the Vizio logo lit up but did not change when the power button was pressed the repair man deemed it the control board. He ordered and replaced the board, synchronized the remote and all work well.
Matt C
Member
Last Activity: 04-22-2014, 05:39 PM
Joined: 02-18-2014
Location: Clinton Township, MI
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
guess that I'll call Vizio and have them come out to repair...Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
Can I include some different information that would make it easier to guide me through the diagnosis? Or is anyone aware of the main part(s) that would cause this malfunction? I'm not opposed to replacing an entire board if that is what it takes.Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
Thanks everyone. When I measured voltage using the 450V cap hole on the main board I got a reading of 37.6ACV on Fuse A (Red stripe) and a reading of 17.47ACV on Fuse B (Yellow stripe). This to me seems suspect in that I am not getting a 120ACV on any fuse now. To take the reading using the 450V cap I just jammed a lead to my meter in the hole of the cap as described by "tom66". The symbol that was where I probed for ground using the 450V cap negative (and no capacitor was present) had this...Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
Anybody know where the Negative leg of the 450VDC Main filter cap is?Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
OK I have confirmed my voltage regulator measurements (VR). I have included a better picture of the logic board with the measurments indicated on each VR right on the photo (I will also include the measuremnets belowwithin the body of this post). Also on the photo I have indicated my ground point. As a point to note I have not been able to find the Negative leg of the 450VDC Main filter cap for properly reading voltage accross the fuse maked "FUSE B" in the photo "power supply with Fuses...Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
Thanks budm. I'll recheck the fuse. Your statement "Did you check the two fuses on the main board (where you have those input connectors)" is something I'm not clear on. I know that the White board has two fuses and I have checked those. The green board has three very small fuses. I checked them for open but obviously could not get a voltage reading because I have no power to that board that I'm aware of. And voltage regulator ICs I have checked...I think. I checked everything that looked like...Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
OK a small update. I have reviewed most of the data that was supplied by budm and was blown away. To be hones I'm a bit overwhelmed. I did do some testing with the the TV plugged in (something that I wasn't so sure I should do before reading the documents). I took some photos that I'll use to help tell my story. Because of my symptom "TV has power but won't turn on" I decided to try and isolate the problem to either the power supply side or the control side. In the picture "Overall layout...Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
You had a similar problem? What did you replace?Leave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
If you call Vizio they can schedule a service person to come to your home for repair. This will be done for a fixed price. Or since you found this forum you could have a run at fixing it yourself. Lots of talented people out there to help you throughLeave a comment:
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Re: Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
Yes that was me. Sorry. This is actually my first time on a forum and I'm sure that there will be plenty of "teachable moments". Thanks for the response I will review the information that you've provided and respond with my findings. I have attached some pictures of the board. It may take me a few days to test since I'm doing this all in the evenings when I have the time. Who knows, maybe the solution is provided within the context of the information that you've already given. Excited to say...Last edited by Matt C; 02-19-2014, 07:34 AM.Leave a comment:
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Vizio model SV422XVT "VIZIO" logo lights orange but won't turn on
It seems that a lot of folks are having trouble with this Vizio model SV422XVT. I love the TV but it went right out on me. The "VIZIO" logo lights orange when it is plugged in but it does not turn white when the power button is hit. Just a black screen, no sound. Before giving up the ghost it did scew the picture a couple of times (like when the channel signal wasn't quite right on an old school tv for those of you that can remember that far back). I'm new to this site and to diagnosing TVs any help would be greatly appreciated. I am a technical guy and write electrical schematics for... -
Re: Vizio SV422XVT no backlight, photos and details inside
It seems that a lot of folks are having trouble with this Vizio model SV422XVT. I love the TV but it went right out on me. The "VIZIO" logo lights orange when it is plugged in but it does not turn white when the power button is hit. Just a black screen, no sound. Before giving up the ghost it did scew the picture a couple of times (like when the channel signal wasn't quite right on an old school tv for those of you that can remember that far back). I'm new to this site and to diagnosing TVs any help would be greatly...Leave a comment:
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Re: Vizio e320vl stuck on vizio logo
It seems that a lot of folks are having trouble with this Vizio model SV422XVT. I love the TV but it went right out on me. The "VIZIO" logo lights orange when it is plugged in but it does not turn white when the power button is hit. Just a black screen, no sound. Before giving up the ghost it did scew the picture a couple of times (like when the channel signal wasn't quite right on an old school tv for those of you that can remember that far back). Any help would be greatly appreciated. I have it apart and have inspected it for obvious...Leave a comment:
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