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Re: Vizio e470va No Picture
RECAP of Measurements:
Power Board
Out to Inverter: 24v=Yes, On/Off=Yes
Out to Main Board: 24v=Yes, 12v=Yes, 5v=Yes, PS-ON= Yes
Large Filter Caps= ~Good~ reading was >360Vdc
Inverter Board
Backlight On: Yes
Fuse: ~Good~ measured 24v
In from Power Board: 24v=Yes, On/Off=Yes
Main Board
In from Power Board: 24v=Yes, 12v=Yes, 5v=Yes, PS-ON= Yes
Out to T-Con: 5v=yes
Volt Regs Outputs:
U103 - (G9084) = 5.02v,
U608 - (17809 0501) = 5.07v,
U704 - (M171 1117-18) = 3.28v,
U706 -(M189 1117-33) = 1.77v
T-CON
In from Main Board: 5v = yes
Fuse: Good 5v on each side.Comment
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Re: Vizio e470va No Picture
O.k. So power supply and the inverter board are good.
What are the voltages on all 3 pins on U103, U608, U704 and U706 on the main board?
Then there could be a bad eeprom or some other wired fault that requires replacing the main board.Last edited by CapLeaker; 02-17-2015, 04:18 PM.Comment
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Last edited by budm; 02-17-2015, 04:31 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
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Re: Vizio e470va No Picture
I was grounding at the wrong location. Sorry for being an idiot. I'm still learning. Here's what I got...
U103
Output tab = 0v
Pin 1 = 0v
Pin 2 = 0v
Pin 3 = 0v
U608
Output tab = 0v
Pin 1 = 0v
Pin 2 = 0v
Pin 3 = 0v
U704
Output tab = 1.80v
Pin 1 = 0v
Pin 2 = 1.8v
Pin 3 = 3.32v
U706
Output tab = 3.32v
Pin 1 = 0v
Pin 2 = 3.32v
Pin 4 = 5.12vLast edited by at1105; 02-18-2015, 10:44 AM.Comment
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Re: Vizio e470va No Picture
What would cause U103 and U608 to not have any voltage?Comment
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Re: Vizio e470va No Picture
Check for open fuse on main board. (F701)5ampComment
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hi guys, i need your help again...i have tcl u65x9006. while i was watching it become darker like when a movie ends, little by little the image disappear. now if i turn on i have back light on, after like 1 min i have also sound but no picuture. the back light is on i take off one at time the ldvs but nothing change always no picture. i tried to cover with a piece of paper the pin of ldvs i cover like 7 8 pins but nothing worked. the tv stay with no picture. there is a tcon board.i checked the voltage there on the fuse i have 11,8 volts. there is caps in shorts on the exit of the tcon i have... -
Hi people!!
The owner said it showed bad picture once in a while (attached)
I see that there is back light but no picture.
I want to ask if it is possible to disable the NVIDIA GPU and use the intel one?
Also attached schematic and BDV
LINK to schematic & boardview - https://www.badcaps.net/forum/troubl...ll-vostro-5590...07-13-2025, 01:03 PM -
Hey guys,
I have a Vizio P502ui-B1E with no display activity at all with the power light on. It broke in a very specific way, and now exhibits strange behavior when turned on (slow response to power off command, restarts every 90 sec, more below), so I'm hoping that someone with experience working on this TV can point me in the right direction.
I already tried the 2 most common fixes with no luck:
- Replacing the T-Con board.
- Re-flashing the firmware on the U202 chip (from here: https://www.badcaps.net/forum/showthread.php?p=840012)
Here's exactly... -
Hello, i am working on Vizio M70-C3. It can hardly power on, it takes 15 power button presses or remote. Seems like eeprom problem that I seen before but all reading online says that this tv has power board or main board problem.
When tv powers on vizio V logo shows nice on whole screen. picture 1
When it goes into tv mode it only shows good picture on left side of screen, right is all scrabbled up. pic 2
When i start youtube picture shows on left side fine, right is all scrambled. pic 2
When i click video to start playing picture goes black(like when you change... -
Hello all ~
I’m working on this Samsung 60” LED and purchased a new main board a couple of days ago that did not fix the 5 blink issue. The original main board’s HDMI ports (all 4 of them) failed to work and no amount of reflow remedied that.
This 5 red light blink code on the front panel LED is followed (about 15-20 seconds afterward) by an automatic reboot, and results in 5 more red light blinks. Then the entire cycle repeats itself indefinitely.
No picture. No sound.
I tested all the voltages coming out of the power supply...
Comment