Picked up this set today. It will power on. No picture or sound. And it will not turn off. I think mainboard. I have all voltage 24v,12v 5vsb 5vps-on 3vbl but no dimming. Pictures will come later.
-
-
Re: vizio l42hdtv10a
My camera is on the fritz. But here are some voltage reg. reading.
u4
In 5
out 3
adj 0
u5
I 3.3
o 1.9
.69
u6
i 5
o 3.2
a 0
u7
i 0
O 0
a 0
u8
i 5
o 0
a 0
u9
i 0
o 0
a 0
u10
I 0
O 0
A 0
U16
I 5
O 2.48
A 0
U18
I 0
O 0
A 0
DU2 I 5.5 O 3.3 A 0 DU3 I 5 O 2.48 A 0 DU4 I3.25 O1.25 A 0Attached Files -
-
Re: vizio l42hdtv10a
replace u9 on the board and recheck the voltage on all of them. Normally just that voltage reg goes out from what I seen.Last edited by jeffecor; 10-22-2015, 08:29 AM.Comment
-
Re: vizio l42hdtv10a
u8
i 5
o 0
a 0
Input is 5V and no output? it is dead if that is the case or shorted load (you can check the resistance on output pin against GND).Last edited by budm; 10-22-2015, 09:04 AM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: vizio l42hdtv10a
Will do that tomorrow. I found u18 shorted. Replaced it and still the same.Comment
-
Last edited by budm; 10-22-2015, 06:27 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: vizio l42hdtv10a
I replaced u8, u9, and u18. Still same results.What is the MLCC?Comment
-
Re: vizio l42hdtv10a
So when you removed the regulators, did you check the resistance between the solder pads where the regulators were against GND to see of the shorts went away?
MLCC: Multi Layer Ceramic Capacitor.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: vizio l42hdtv10a
yes i did check and the short didn't go away.Comment
-
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: vizio l42hdtv10a
Sorry but i haven't been able to troubleshoot this down to the component. I have ordered a new mainboard and will follow up later.
Thanks for the help!!!!!Comment
-
Re: vizio l42hdtv10a
Ok replace the main board. Still the same. There is no bl_on voltage or no dim light voltage. I got 4.4dvc on the ps-on. What you guys think?Last edited by fixerupper75; 11-05-2015, 04:02 PM.Comment
-
Re: vizio l42hdtv10a
Where did you get this board from? Those signals are generated by the main board.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: vizio l42hdtv10a
Electroparts off of ebay. I think I've made a rookie mistake the board number doesn't match. Orginal 3642-0062-0150 new 3420-0012-0150. ugh.Comment
-
Re: vizio l42hdtv10a
Is their any other site besides ebay or shop jimmy to get parts?Comment
-
Re: vizio l42hdtv10a
a quick google search no one seems to have the board in stock maybe for now whilst your looking put your old board back in and maybe we can do some more fault finding like budm suggests in post 8, also most repair kits online consists of these so double check on your board
Kit contents
Replacement components for U5 , (U4, U6, U8).Last edited by vinceroger69; 11-05-2015, 04:54 PM.Comment
-
Re: vizio l42hdtv10a
My soldering skill could use the practice.Comment
-
Problem
Fixing a dimming zone TV with LEDs not lighting up. Dimming zone circuit introduces added variable to diagnose LED and/or Dimming Zone Driver board? Some 1/2 rows of LEDs appears to be out in active dimming zone off AND some brightness flickering with active dimming zone high while playing changing video
Model & Board Pics
Conflicting Spec
Vizio indicate this TV has 10 dimming zones. However, LED strips and Zoned light driver connector suggest 12
https://www.shopjimmy.com/vizio-gj-2k1... -
EDITED: I thought my Vizio E470VL has +5VSB and no 12v on the PS board, but after plugging the cable back in and testing the pins on the Main board I realized that I do have 12V. I assume the 12V is turned on when the ON/OFF switch is pressed. The Vizio light in front does go from Standby Orange to White when ON. But, I still have no picture or sound. Test values of PS board are below.
+5VSB= +5.09
12V= +12.18
PS_ON= +2.25
I_ON/OFF= +3.27
LAMP= +3.18
DIM= +2.97
Any more testing I can do on Main board or is it just a replacement?... -
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... -
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...
Comment