Tried that but now nothing seems to make it want to power on
Blackwolf
Member
Last Activity: 05-08-2016, 01:27 PM
Joined: 03-22-2012
Location: Green Cove Springs FL
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Re: Seiki SE39UY04 Unreliable power on
Tried that but now nothing seems to make it want to power on
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Seiki SE39UY04 Unreliable power on
I have a Seiki SE39UY04 (yes i know these things are notoriously crappy) and when connected to power the red light (standby) comes on but the tv wont always power on. If i give it a good whack on the back of the unit, it will come on and work fine for hours. It will even turn on and off fine after that until i turn it off and let it sit for a few hours, then the same problem happens. Im thinking it might be some kind of bad connection or bad solder joint somewhere given that a good whack makes it work. I took apart the tv and looked for any obvious signs of bad components but everything looks...Last edited by Blackwolf; 05-08-2016, 12:58 PM. -
Re: Vizio VS420LF1A Screen/backlight goes off after awhile
Some pics i took before are available here
[URL="https://www.badcaps.net/forum/showpost.php?p=226233&postcount=3"]https://www.badcaps.net/forum/showpost.php?p=226233&postcount=3[/URL]
These are the only 2 boards i see, is there another i may be missing somewhere?Re: Vizio VS420LF1A Screen/backlight goes off after awhile
Some pics i took before are available here
[URL="https://www.badcaps.net/forum/showpost.php?p=226233&postcount=3"]https://www.badcaps.net/forum/showpost.php?p=226233&postcount=3[/URL]Leave a comment:
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Re: Vizio VS420LF1A Screen/backlight goes off after awhile
The sound does stay on, and i do see the picture on the LCD when i look closely at it with a flash light, so it must be the back light. I turned it on today and it stayed on for several hours with out going out but then it happened. Is it bad inverter or psu issue perhaps? Why does it sometimes work for hours then other times only a few min? Maybe theres a short or something?Last edited by Blackwolf; 08-13-2012, 11:05 AM.Leave a comment:
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Re: Vizio VS420LF1A Screen/backlight goes off after awhile
Ok i will try that, but would that cause the backlight/lcd to turn off but leaving the vizio logo white? (not orange like when its in standby)Leave a comment:
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Vizio VS420LF1A Screen/backlight goes off after awhile
I have a Vizio VS420LF1A that i had previously posted about here in this forum.
The back light and lcd was not coming on at all, yet the Vizio logo at the bottom was turning white. After testing several components i just gave up and purchased a new (used) PSU off ebay. I connected it and the TV worked great for 2 months or so. Unfortunately now Im having a problem where the tv will come on and work fine, but then the back light and lcd will just turn off (vizio logo still white) sometimes after several hours of use, or sometimes after just a few min. If i turn off the tv and let it sit... -
Re: Vizio VS420LF1A No picture/backlight
Any luck? Should i just look into replacing the entire PSU?Leave a comment:
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Re: Vizio VS420LF1A No picture/backlight
Let me know if you need any other pics, or to know what components are
Thanks againLeave a comment:
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Re: Vizio VS420LF1A No picture/backlight
It says STR w6251 8n06jLeave a comment:
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Re: Vizio VS420LF1A No picture/backlight
And heres the rest......Leave a comment:
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Re: Vizio VS420LF1A No picture/backlight
Here are the pics, please let me know if you need any retakes, i tried to do the best i could but my camera isn't so great.
Also just wanted to say thanks for spending your time helping me out with this....Leave a comment:
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Re: Vizio VS420LF1A No picture/backlight
Did you need different pictures then the ones already posted? If so what exactly should i take pics of?Leave a comment:
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Re: Vizio VS420LF1A No picture/backlight
i get 2.09v when the tv is powered onLeave a comment:
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Re: Vizio VS420LF1A No picture/backlight
Ok i read the voltage on the 450vdc
it read 165v in standby, after powering the tv on, it went up to 387v.
Attached is the requested pics...Last edited by Blackwolf; 03-28-2012, 04:30 PM.Leave a comment:
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Re: Vizio VS420LF1A No picture/backlight
Sorry for the delay in response, I was traveling and havent had a chance to test until today.
The first thing i checked was the connector circled in blue.
Legend is as follows
Pin 1 - PSU on/off
Pins 2 3 4 - +12v
Pins 5 6 7 8 9 - GND
Pins 10 11 12 - +5v
Pin 13 Dim
Pin 14 Inverter on/off
I checked voltage on +5v and it checks out,
however on the +12v line i am not getting +12v. Its reading 0.19v
So im guessing this is...Leave a comment:
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Re: Vizio VS420LF1A No picture/backlight
These are the only 2 boards i see, i do see wires running from the PSU to either side of the panel, Im guessing these wires go to the inverters.
I cant see any easy way to get to them, ill have to take the entire panel apart.
I will try to do that if you think it could be an inverter issue.
Ive repaired sets before that have bad inverters and usually im able to see something on the screen when using a flash light and looking very closely, in this case i cant so Im not sure if its an inverter issue or not but you guys...Leave a comment:
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Re: Vizio VS420LF1A No picture/backlight
Attached are the pictures, I do have a multimeter and I am familiar with how to use it.
Thanks for your help...Leave a comment:
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Vizio VS420LF1A No picture/backlight
Ive got a Vizio VS420LF1A and having an issue with it:
When power is connected, Vizio logo glows orange,
i press power button... the logo turns to white and that's it. I see nothing on the screen, i don't see the back light come on, just a solid white Vizio Logo showing its powered on.
I opened it up and looked for the obvious things like bulging/leaky caps
and everything appears ok.
I also took a flash light and tried to look closely at the panel when it was on to see if i could see anything on the screen (like if the back light wasn't working, but...
No activity results to display
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