Re: Vizio 40” V405-H19 has backlight, no display
[ATTACH]270202[/ATTACH]
I included the above drawing. Hopefully you can make sense of my scribble.
I still need to draw a diagram of the other chip but I measured 12.63 volts as well as 5v. There were other voltages that measured between .600 and 1.5 volts.Re: Vizio 40” V405-H19 has backlight, no display
[ATTACH]270202[/ATTACH]
I included the above drawing. Hopefully you can make sense of my scribble.
I still need to draw a diagram of the other chip but I measured...
mattd1979
Member
Last Activity: 05-13-2023, 01:00 PM
Joined: 04-07-2014
Location: Callahan, FL
-
Re: Vizio 40” V405-H19 has backlight, no display
[ATTACH]270201[/ATTACH]
The only two voltages I found close to what you were asking was pin 1 starting from the top left above the “I” in “INX” which measured at 4.970V and pin 3 above the “N” at 12.63V. I tried looking up the chip but couldn't find anything specific.Re: Vizio 40” V405-H19 has backlight, no display
[ATTACH]270201[/ATTACH]
The only two voltages I found close to what you were asking was pin 1 starting from the top left above the “I” in “INX” which measured at 4.970V...Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
Which of the 3 ICs do I check?
[I][/I][ATTACH]270024[/ATTACH]...Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
Wow, that was a lot of information and good Q/A. Is there a way to test the IC? I suppose I would need a pin out diagram and what the voltages should be.Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
I just finished checking resistance on all of the capacitors I could find on the T-CON board and the readings ranged from 550 ohms to 30.00 k ohms.Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
The only capacitors I am familiar with are the cylindrical capacitors and I don’t see those. I see very tiny chips. Some are tan and some are dark brown that seem to vary slightly in size. Are those capacitors?Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
Which ones are the brown caps and how do I go about testing them?Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
[CENTER][/CENTER]
Readings are the same when unit is on or off.
VGH = .793 V
VGL_AA = 1.156 V
VGL_GOP = 0.00 VRe: Vizio 40” V405-H19 has backlight, no display
[CENTER][/CENTER]
Readings are the same when unit is on or off.
VGH = .793 V
VGL_AA = 1.156 V
VGL_GOP = 0.00 VLeave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
I recently tried disconnecting the ribbon cables as you said but it didn't make a difference. What should the voltages be on the VGH and VGL test points?Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
Yessir I get 12.64 volts at each end of the fuse next to the ribbon connector.Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
I tested the resistance on the fuse and it is at .02 ohms.
[ATTACH]269311[/ATTACH]
[ATTACH]269312[/ATTACH]
[ATTACH]269313[/ATTACH]
[ATTACH]269314[/ATTACH]
[ATTACH]269315[/ATTACH]
[ATTACH]269316[/ATTACH]
[ATTACH]269317[/ATTACH]
[ATTACH]269318[/ATTACH]Re: Vizio 40” V405-H19 has backlight, no display
I tested the resistance on the fuse and it is at .02 ohms.
[ATTACH]269311[/ATTACH]...Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
[attach]269309[/attach]
[attach]269310[/attach]Re: Vizio 40” V405-H19 has backlight, no display
[attach]269309[/attach]
[attach]269310[/attach]...Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
Are you referring to the little white chip to the lower right of the connector in the photo on the T-CON board?
[ATTACH]269308[/ATTACH]...Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
I have attached 4 photos. One wide shot and 3 up close shots of the T-CON board.
[ATTACH]269303[/ATTACH]
[ATTACH]269304[/ATTACH]
[ATTACH]269305[/ATTACH]
[ATTACH]269306[/ATTACH]Re: Vizio 40” V405-H19 has backlight, no display
I have attached 4 photos. One wide shot and 3 up close shots of the T-CON board.
[ATTACH]269303[/ATTACH]
[ATTACH]269304[/ATTACH]
[ATTACH]269305[/ATTACH]
[ATTACH]269306[/ATTACH]Re: Vizio 40”...Last edited by mattd1979; 07-21-2022, 05:33 PM.Leave a comment:
-
Re: Vizio 40” V405-H19 has backlight, no display
Is there anything I can do at the component level to fix it? The T-CON board to LCD ribbon cables are bonded to the LCD.Leave a comment:
-
Vizio 40” V405-H19 has backlight, no display
I have a Vizio TV that I am trying to fix for a friend. The problem is when you turn it on, you get a back light but no picture. If I press the input button one time on the remote, I will hear music. I ordered and replaced the main board as well as the power board from Shop Jimmy but no change. Any ideas on what else I can try to get a picture? The TV is a couple of years old.
Thanks in advance,
Matt -
Re: Vizio vp422hdtv10a turns on, no video or sound
Anybody have any ideas? Would it be worth replacing the power supply to see if that takes care of the problem? The voltages are around double what they are suppose to be on the two that I could find.Leave a comment:
-
Vizio vp422hdtv10a turns on, no video or sound
When I press the power button the Visio name switches from amber to light blue but there is no picture or sound. I pulled the back panel off to get readings at the PSU and found that Va=111.4 V(suppose to be 54 V) and Vs=436 V(Suppose to be 207 V) with the power on. I couldn't find Vsc or Ve to take their readings. -
Re: Proscan 40LC45S57 with red LED and clicking.
Just wanted to let everyone know that replacing the inverter indeed restored the TV back to operational standards. I found a good board on Ebay for $14.00 including shipping. It looked brand new and was well packaged.
I noticed on the backside of the original inverter board that it has three brown spots in the lower left corner area. On the front side of the board it has three small ICs under the large transformer. You can see them in the first picture of the group of pictures in post #5.Last edited by mattd1979; 05-07-2014, 10:13 PM.Leave a comment:
-
Re: Proscan 40LC45S57 with red LED and clicking.
Is there anyway I can test the inverter or the PSU board independently? If so then please give me some instruction on how to go about proceeding. ThanksLeave a comment:
No activity results to display
Leave a comment: