Hello everyone, I have a shot at this TV and was wondering if anyone else thinks this is potentially a "Gamma Correction Chip" issue, or maybe something similar?
Thanks everyone!
Thanks everyone!
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They call me......."threadkiller"
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Re: Vizio E65x-C2 question about Gamma
Well (gulp) here it is in my living room and what the screen looks like with a picture on it.
WOW that's bright!
What do you all think?Attached FilesThey call me......."threadkiller" -
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Re: Vizio E65x-C2 question about Gamma
How about the pictures of the T-CON board and some Gamma Voltage readings?
What is the history of the TV?
Hard to help with so little details information.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 E65x-C2 question about Gamma
I haven't opened it up yet, so I'll post this pic of the one choice of t-con from ShopJimmy and ask for instruction on test points to obtain gamma voltage readings. I'll check the voltages and post pics of the back of the TV at that time.
Image courtesy of ShopJimmy.comAttached FilesThey call me......."threadkiller"Comment
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Re: Vizio E65x-C2 question about Gamma
Hasn't this tv been posted before? If you look at the corners, there is some darkness there plus the panel appears to have "waves" (left side). It appears to have had some led work done on it and maybe some of the layers aren't right.Comment
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Re: Vizio E65x-C2 question about Gamma
Hi Budwich, I suspect the same thing about LED work and the waviness, diffusion sheets bunched up behind the screen artifact. I searched the forum and found only one other post for this model TV and it wasn't this one.
Still hoping for the test point locations and anticipated voltages to check the gamma chip.They call me......."threadkiller"Comment
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Re: Vizio E65x-C2 question about Gamma
yes I found the other post, different set... same strange wave display. But if the layers aren't back properly, can the display show up like this "white out"?Comment
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Re: Vizio E65x-C2 question about Gamma
So what is the history of the TV? Someone worked it and took the panel apart?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 E65x-C2 question about Gamma
The guy I got it from told me someone had worked on it before he got it. Apparently he wasn't sure of what repairs took place. He said him and his girlfriend were watching it when the screen went the way it looks now and has been this way since. This is all I know of its history.They call me......."threadkiller"Comment
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Re: Vizio E65x-C2 question about Gamma
probably won't help much as the poster didn't go much further based on responses. Its just strange that the display has similar waves.... not necessarily the "white out picture" though.
https://www.badcaps.net/forum/showth...highlight=waveComment
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Re: Vizio E65x-C2 question about Gamma
Maybe that is just the way the Panel failures for these sets show up. To be certain, if it was my personal TV I would try a T-CON Bd to be absolutely certainComment
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Re: Vizio E65x-C2 question about Gamma
It does look similar to how my screen appears.
They are cheap for this TV. I'll be looking at this today, later. Maybe by then I'll have the info I need to check the voltage readings related to gamma. I hope this isn't a failed panel. It's all gamma'd out but the motion of the images on the screen are smooth. Like you said, maybe this is how these panels fail, or will tend to fail as time goes on.They call me......."threadkiller"Comment
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Board pix
Ok now I know a little more about this TV. First off, its pretty dusty in there, so it looks like its been a while since the back has been off, or whoever worked on it beforehand didn't clean anything. There are witness marks on the main board and trim bezel screws that show it's been apart previously.
It looks like the person I got it from was telling the truth when they said "they don't want to deal with it" and "didn't touch it". None of the dust inside looked like it was recently disturbed.
There are no obvious failures I can see on any of the boards, all of the cables are seated and all the board screws are tight.
Interestingly enough the main board itself is the same board in the Vizio E55-C2 I recently did a cap bypass on. Link: https://www.badcaps.net/forum/showth...ghlight=e55-c2
I'm now ready to test the Gamma voltages.Attached FilesThey call me......."threadkiller"Comment
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Re: Vizio E65x-C2 question about Gamma
Guys, I don't know how to check the gamma voltage on this board. Does anyone have any service information for this? Thanks
They call me......."threadkiller"Comment
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Re: Vizio E65x-C2 question about Gamma
U600, U700 look to be for GAMMA BUFFER IC's.
What is the P/N as printed on top of the IC'S?
VG_A*, VG_B* test points look to be for GAMMA Voltages but we cannot tell until we verify the P/N of the IC's.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 E65x-C2 question about Gamma
budm, here's the numbers:
U600:
AUO-G1422
1450 89.14
59
U700:
AUO-G1422
1501 98.15
59
Since there are two, is one for the right side of the panel one for the left?
Picture followsAttached FilesThey call me......."threadkiller"Comment
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Re: Vizio E65x-C2 question about Gamma
So far no luck finding the spec sheet.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 E65x-C2 question about Gamma
Yeah me neither.They call me......."threadkiller"Comment
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Re: Vizio E65x-C2 question about Gamma
Since you are "thinking gamma", you could just do some "blind measuring" with hopes of seeing some "pattern" on the pins.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....
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