So I got this thing broken. When I go to test it, it will turn on and function as a completely normal TV. When I hit the power button when it's cold, it will turn back on when I hit the power button. It will not after being turned on for a long time. And it will run for as long as you want until you turn it off. I brought it to my apartment to temporarily use and now it won't even turn on...All the caps look good on both the main board and the power board although not a fan of the cap choice. Is it probably the voltage regulators on the main board? I'll get my multimeter back tomorrow. In the meantime, is there any ideas to what it could be?
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Re: Vizio 37" having intermittent issues
Sounds like an intermittent regulator though Vizio I know used some crap caps in their 37" PSUs.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Vizio 37" having intermittent issues
Yeah I'll have to check the regulators. The caps on the PSU are Sam Young on the secondary and a NCC on the Primary. Some of the Sam Young's looks like there's pressure in between the vent stamps but not bulging towards the middle, know what I mean?Comment
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Re: Vizio 37" having intermittent issues
I prefer these types of problems rather than the intermittment ones. I have an ATX power supply that sometimes works and then dies and sometimes it doesn't power on. I wish it would just do the latter and then I can start troubleshooting it.--- begin sig file ---
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Re: Vizio 37" having intermittent issues
Okay so I got around to testing this thing. Let me know if there are more I need to test if I missed any. Looks like I have at least 1 bad voltage regulator...Here are the results:
#1
Pin 1 = 0.000
Pin 2 = 1.252
Pin 3 = 3.326
#2
Pin 1 = 2.056
Pin 2 = 3.306
Pin 3 = 5.050
#3
Pin 1 = 0.000
Pin 2 = 0.000
Pin 3 = 0.000
#4
Pin 1 = 0.559
Pin 2 = 1.816
Pin 3 = 3.333Attached FilesLast edited by Pentium4; 10-24-2012, 09:09 PM.Comment
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Re: Vizio 37" having intermittent issues
Thanks for the reply! Part # is: EH11A 127F25. Circled is the closest thing that gets DC power (I didn't test the caps though)Attached FilesLast edited by Pentium4; 10-24-2012, 09:43 PM.Comment
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Re: Vizio 37" having intermittent issues
What is part number TU1? Post a link to its datasheet as well.--- begin sig file ---
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Re: Vizio 37" having intermittent issues
On pin 3 of TU8 (regulator #3), see what it has continuity to. Namely, does it have continuity to any pins on TU1 or the caps TCE5 and TCE6?--- begin sig file ---
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Re: Vizio 37" having intermittent issues
All 4 of them have the same Part # on them.
thank you for your help so far!
Pin 3 of #3 has continuity to only cap TCE5Last edited by Pentium4; 10-24-2012, 10:35 PM.Comment
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Re: Vizio 37" having intermittent issues
I mean the datasheet for TU1 (8 pin IC).--- begin sig file ---
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Re: Vizio 37" having intermittent issues
Ohhh okay. I can't find anything on it. It reads:
432N
C0J5
07
Thank you for being patient with me
Last edited by Pentium4; 10-24-2012, 10:48 PM.Comment
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Re: Vizio 37" having intermittent issues
It could be
https://cdn.badcaps-static.com/pdfs/...a5f3eed1f1.pdf
See if pin 3 (VCC) has any voltage wrt to chassis ground.--- begin sig file ---
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Re: Vizio 37" having intermittent issues
Whats the model I might have the power board?Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
vizio e650i-a2 (LWJAOZBP Serial) led backlight flashes then turns off, has video (via flashlight) and audio.
panel: au optronics T650HVN05.4
72 led total on 12 strips, 6 led per strip wired in three groups of 24 (led driver board has three anode and three cathode pins)
link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1
Vizio 56.04219.641G (liteon PA-3231-01WN-LF) Power Supply Unit
https://www.shopjimmy.com/vizio-56-0...-power-supply/
Vizio 55.75J01.001G (91.75J10.004G) Main Board... -
We've had our Vizio VO42L since before 2010, and it's worked flawlessly this entire time. However, just recently it started emitting a high-pitched buzzing/humming sound. I followed the basic troubleshooting tips of just unplugging it for a moment, and even holding down the power button while doing so, all to no avail.
Furthermore, after I attempted these basic steps and powered the TV back on it would always begin visually flickering while the sound stuttered. After a few moments of being turned on this would go away, but it still periodically comes back.
I also... -
I have this Vizio VO370M TV that I'd like to save because it has very low input lag (as good as the most expensive TVs sold today!, https://alantechreview.blogspot.com/...input-lag.html), but it has a very annoying issue: sometimes the backlight flickers (or is just kind of dim). The flicker is slower than 60hz, so we aren't just talking some kind of motion compensation).
I was hoping maybe it was a power board issue (aka failing caps) but I opened it up and I don't see any that look bad. I have a budget capacitance/ESR meter if it's worth checking those... -
Failure Symptom
No picture, just red vertical stripes. Google search shows quite common problem for these recent Vizio M series although red vertical stripe pattern may differ. Some call it "Netflix" boot screen haha.
Where is the short?
Panel has 4x buffer boards. Quickly found the 1/4 panel buffer board with the problem by selectively disconnecting buffer board flex cables.
Having recently fixed another Vizio with similar symptoms that was a shorted ESD diode array ( link ) Probed the ESD diode array but...
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