Understood Glitcher, thanks for the feedback. I'll call it good then & get the $50 core return
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DIY
Last Activity: 08-09-2014, 12:06 PM
Joined: 06-21-2014
Location: Mesa, AZ
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Re: 55" Vizio XVT553SV Powering off problems
Understood Glitcher, thanks for the feedback. I'll call it good then & get the $50 core return
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Re: 55" Vizio XVT553SV Powering off problems
Please see post# 18, I have replaced the main board and now the TV is fixed. I am looking for help just to troubleshoot the problem on the old main board. Now that I have a good board & a bad board I'm hoping to get help to try & find the problem on the old board so I have a spare.Leave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Any help, anyone?Leave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Thank you truep. How do I check them & where are they?Leave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Solved: Couldn't get any help on this one so I ordered a new main board, plugged it in and now the TV works like it should again. Now that I have narrowed the issue down to the main board, is anyone willing to help me try & find the problem on the board so I can have it for a spare? I hope this helps other Vizio (throwaway-TV) owners, I know it's impossible to find resolved issues online anywhere, everyone seems to give up!Leave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
OK, now the TV flickered on & off for about 10secs & went off. Now it wont respond to the power button or remote at all. When I plug the power cord in it doesn't even flash the Vizio amber & white any more, it just stays steady amber. I do have 5.17V everywhere on the boards, fuses have not blown. The way I think it works is the 5.17V standby is used to boot up the main board. Does anyone know the steps to measure standby voltage on the main board, after the fuse? The fuse is good, 5.17V on both sides, but where does...Leave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Yes it does stay warm
After the TV powers off, I unplug power & leave it for a while then plug the power back in. I have the 5.17V standby everywhere. In this condition when I measure the caps on the main board CE39 now measures 4.81V & 1.107V on ground side, does this sound normal? All other caps are 0.0V on ground side & 0.0V mostly on rest with a couple reading 2.5V & 3.3VLeave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
HDMI chip is not hot & CPU is not hot when it powers off, only gets hot after that. I have no inputs to the TV at this point. I checked all caps & all are within voltages you listed except CE39 this one reads 0.013V. This is located just to the right of the ethernet plug in socket. As you look at the picture there are two next to the ethernet socket, it is the top one with no voltage. Also I have 18V on some caps, but I believe this is normal right? As I have 18V on this board normally.Leave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Hi ecking767, I am just plugged in, I dont have a separate input. The CPU is more than warm, it's pretty hot! but when the TV turns of after 10 secs, it's not that hot. The voltages remain after it powers off and the CPU continues to get hotter. I'm not sure which is the HDMI chipLeave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Well ok, can anyone help me troubleshoot the main board?
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Re: 55" Vizio XVT553SV Powering off problems
Any help out there? Is this TV repairable? I have a good meter and don't want to throw parts at it, just need a little direction. I know Vizio is not very good, AT ALL! Anyone willing to tackle it?
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Re: 55" Vizio XVT553SV Powering off problems
No it doesn't, everything powers off togetherLeave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Can anybody help me?Leave a comment:
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Re: 55" Vizio XVT553SV Powering off problems
Thanks for responding. If I unplug the power from either PSU to T-conn board, or ribbon from main board to T-conn board the TV stays on for about 2 minutes (instead of 10 seconds), then powers off in same way. I have to get some freeze spray. Could you look at the pictures & tell me what to unplug for testing?...Leave a comment:
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55" Vizio XVT553SV Powering off problems
So I've been living with this issue for a couple of years, resetting by unplugging but slowly it's been getting worse & worse. now the TV only stays on for 10 seconds then powers off. Once it turns off, the power button doesn't work unless left alone for about 30 minutes, then it will power on for the same 10 seconds then power itself off again. If I unplug it, then plug it back in, I only have to wait about 2 minutes for it to power on for the same 10 seconds.
I have the back off, looked hard, but don't see anything burned or bulged. All fuses are good. I have made some measurements;... -
Re: New Members - please post your introductions here
Sup? just a DIY guy hoping for help repairing my TV... and anything else electronic in the future
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