When I plug it in I get a white standby light then after a few secs it goes out. Pressing the power button does nothing. Tested the power supply was getting 5v and the 12v was coming back 12.32v
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
What happens to the standby voltage on the PSU after the LED goes out? -
Re: Vizio 39 Tesla M321i-A2 Not Powering On
About 30 secs to a minute after hitting the power button the voltage begins to decrease til at 0Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
So pin 1 (5V) goes to zero volts and then there no voltages on any of the other pins after the LED dies out?Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
If the 5Vstby is coming on but then dropping to 0V I would check C105 & C107
Are there components on the underside of the power supply and if so can you post a sharp picture?Willing to help but I'm no expert.Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
plug the tv in, do NOT turn it on and measure all 16 pins on the PSU (last picture of your post #1). Turn the TV on, let it fault and redo the measurements. Post the pin out name with the corresponding voltages you measured.Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
Before pressing power button
1- 4.95
2- 3.27
3- .11
4- 0
5- 0
6- .01
7- .01
8- 0
9- 0
10- 0
11- 0
12- 0
13- 0
14- 0
15- 0
16- 0
After led goes off
1- 4.94
2- 3.27
3- 3.06
4- 0
5- 0
6- 12.31
7- 12.31
8- 0
9- 0
10- 0
11- 3.25
12- .09
13- .08
14- .10
15- 3.05
16- .09Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
Pin 8 should also be 12V. Can you recheck it.Willing to help but I'm no expert.Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
your correct 8- is 12.31 it doesn't have a wire going to that pin so i misread itComment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
must be something with the main board. The PSU is fine.Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
Can you disconnect the PSU from the main board and connect PS_On to 5V using a 1K resistor and check that all the output voltages remain constant for over the minute as described in your post #3.Willing to help but I'm no expert.Comment
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Re: Vizio 39 Tesla M321i-A2 Not Powering On
Can some tell me where the main board fuse is for this model?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... -
Hi.
picked up another TV. This time is a Vizio M65-C1. TV does not turn on. I had repaired another 60 inch vizio , Bad main board.
When power button is pressed, the Power led indicator on the bottom right, turns for a few seconds and then it fades away. No backlight or Vizio logo on screen. Removed back cover and repeated test.
This is the TV This TV is a little different from the Samsung I have worked on. Power supply is on the Left side, Main Bd is on the right side, T-CON , not in the picture is on the bottom. I am assuming that the boards in the middle are the LED... -
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... -
Bug looks like hardware so thought I posted it here. Exact same behavior on 2 different model 4K Vizio TVs running their SmartCast smarttv software. After launching youtube app, press vizio button on remote to return to the smarttv menu, once in awhile, a column of bad pixels will show for few seconds on the left hand side.
It seems the vizio software is reinitializing hardware when returning to the smarttv menu. In general, SmartCast software isn't very good. Also will randomly (relatively infrequent) get no network connection when on wifi and require reboot....
Comment