I own a Hitachi 50HK6100U with a display fault. After some troubleshooting, I've found that removing one tcon cable produces a clear image on the side still connected. Removing the other tcon still provides display output; however, this is a heavily distorted image. With both cables connected, only the top ~25% of the screen provides display output which is still distorted. It's only when both are connected that most of the screen no longer provides output. The attached images show the screen with each tcon cable disconnected, and one with both connected. The red line shows where the display cuts off; the 'no signal' box appears/disappears as it moves up/down past this point. I've attempted to multimeter voltage test all of the available points on the tcon and the connected LCD boards; all within range and no difference noted between the left and right LCD board. I've seen other posts starting 'bad panel/backlight' but when each tcon cable is checked individually there is still display output across the whole panel albeit one heavily distorted. Looking for some advice on next point of troubleshooting, if any, or potential solutions. If tcon is the most likely root cause I can likely source a replacement.
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Answer selected by MDY94 at 12-18-2024, 03:02 PM.
i saw many UHD panel with size 50 have same issue at same side of the panel...
try mask only the first 3 pins left at the effected side.. -
i saw many UHD panel with size 50 have same issue at same side of the panel...
try mask only the first 3 pins left at the effected side..Comment
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So, that absolutely resolved the issue! What do these first 3 pins control; do you know what causes this issue?Comment
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I wonder why often users are so few smart to show only a miserable flying window with 'no signal' instead of an entire screen image, i know you are probably delighter instead of professional, i'm delighter too but i try to approach with more effort such a fascinating matter,
plus, as a new member it deserves of at least a greeting...
anyhow, for me, it's a bad tcon, hard to find good tcon in the market, used boards often hides troubles..Last edited by Davi.p; 12-18-2024, 03:12 PM.Comment
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well its conflict , the side which it show correct image.... if you testing all ceramic caps at buffer boards you will have low resistances, however the bad image side caps have to read normal... so the issue inside the panel at gate transistor., blocking the feed from bad side will help to have acceptable image.
the big questions which i don't know till now the answer .... why only the UHD 50 size effected with this issue !!Comment
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Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side... -
The TV shows a black screen with no image.
TCON ribbon connectors were disconnected individually for image and there was no half image even.
Later both ribbons were disconnected and TCON voltages were tested.
12V, 3.3V, 1.8V were seen present but VONE signal reads 0V.
There is also a short to ground in this circled inductor.
Is this a TCON issue or something else ?... -
I have an Arcelik TV with BOE HV650QUB-F70 TCON board, but I think there's an issue with/around PMIC.
PMIC: iML8940
There is backlight and sound, but no picture. I watched a YouTube video and turned it off, half an hour later it was dead.
Input 12v, fuse ok
DVDD1V2 = 1.2v
DVDD1V8 = 1.8v
DVDD3V3 = 3.3v
VGL = -7v
**VGH = -0.3v
**VCOM0, AVDD, HAVDD = 0v
SWBK1 = 3.3v
SW1 = 12v
VGH to GND resistance is 500kohm as expected
Readings are same after I disconnected the two cables from TCON to panel... -
Got this TV free. Guy said it tries to turn on and doesn't. I haven't seen this specific issue before but shown in video. Any way to test the screen to rule it out on these Vizio? Or anyone seen this issue before?
Any help appreciated
https://youtu.be/tPeV2Q7TXIQ?feature=shared -
I have a Hitachi 57F710E Rear Projection TV that was working great until 3 or 4 days ago. I came in and tried to turn it on and it was just dead. So, I unplugged it and plugged it back in. Nothing, not even the slight click that it makes when you plug it in. So, I removed the power supply board (It's a vertically mounted board, I believe model HA01312) and inspected it visually for bulged caps or burnt or overheated components, anything that didn't look right and couldn't find anything.
I noticed on the bottom of the board there was a row of solder joints with voltages printed next...
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