Re: Samsung PS42C96HD no picture/sound OK
Ok so what could be bad? What next to check. Is the Y-main problem or something wich control it?
Ok so what could be bad? What next to check. Is the Y-main problem or something wich control it?
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Re: Samsung PS42C96HD no picture/sound OK
I think the Y-main is good, but something is up with the control board or main board.
Here, I highlighted a test point on X-main. Please check this too. The waveform will be different. Capture at 2ms and 20ms/div.
I'm still confused why doing the 3-4 jump doesn't make the panel run test patterns, as it simply looks like the control board is receiving no video.Attached FilesPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
Yes i have same feeling... I did unpluged LVDS shorted 3-4 fired TV up and nothing changed.
I will take X-main waveform.Comment
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Re: Samsung PS42C96HD no picture/sound OK
ok i have new pictures... X-MAIN test pointAttached FilesComment
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Re: Samsung PS42C96HD no picture/sound OK
Again the waveform is completely wrong - so I suspect the control board.
Can you see if the X-main waveform changes when the Y-main is unplugged (power and control?)
And then measure on the Y-main again with the X-main unplugged.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
With Y-main unpluged is X-main waveform completely the same no change.
And with X-main unpluged is Y-main waveform same too no change.Comment
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Re: Samsung PS42C96HD no picture/sound OK
So how can I check t-con? there is some test point.Comment
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Re: Samsung PS42C96HD no picture/sound OK
I am thinking control board right now. We can also check the main board. For that I will need a close-up shot of the LVDS connector on the control board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
ok i have here motherboard near LVDS and T-con.Attached FilesComment
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Re: Samsung PS42C96HD no picture/sound OK
Simple question all these measrements was with no signal.. no input pluged in... but that doesnt matter i guess.Comment
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Re: Samsung PS42C96HD no picture/sound OK
Shouldn't matter. TV should still display "NO SIGNAL" with no input.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
I've highlighted some points. Test here for any waveforms with LVDS connected.Attached FilesPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
ok that will be dificult to test but i will try and do you know what is V-togg test point in the right top? and what should be hereComment
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Re: Samsung PS42C96HD no picture/sound OK
I don't know what V-togg is.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
ok i tried test that points but all looks similar and its some noise only here... or is that right signal?Attached FilesComment
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Re: Samsung PS42C96HD no picture/sound OK
No, the main board is sending no signal. I guess the self-test doesn't work on this model or the control board also has a fault. Either way, something on the main board looks to be faulty.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
ok can i test video output from the motherboard?Comment
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Re: Samsung PS42C96HD no picture/sound OK
There are some crystal oscillators on the main board which could be bad, as well as some regulators. Checking those points on the control board shows the main board is not sending the right signal.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung PS42C96HD no picture/sound OK
I checked oscillators as well as vregs at first time.. all looks good.
TV stoped working from day to day without any signs of getting worse.Comment
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Re: Samsung PS42C96HD no picture/sound OK
I would suggest a main board swap, although, there are schematics available (for Q96, which I believe is very similar.)
http://www.tgohome.com/ServiceManual...h=Submit+QueryPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Hi, I have a Samsung UE50TU with:
- sound and backlight, but no picture
- when it arrived, it had a picture for a few seconds
- it keeps rebooting
- without ribbon cable between the two panel boards, it does not reboot but I have no picture
- without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
- when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.
- without cable between mainboard and lcd panel and with a jumpered... -
I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and... -
Hello everyone,
Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
Anyway I still fully expect that there has been something seriously damaged... -
Hi all
I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.
Symptom:
No picture no sound.
When I plug in the power cord, Backlight LED turns on for a half second and then turns off. The red LED next to the power button located center bottom flashes 2 or 3 times. When the power button is pressed after, it does the same thing.
No sound at all.
What I tried:
1. I tried unplugging the left or right ribbon... -
Hello all,
This is my first post, but long term lurker on the form learning as much as possible about these TV's. I was given this TV as due to a power outage of constant On/off of power to TV. The TV originally would just click on and off (Typical Reboot Cycle). I opened the back of the TV, and troubleshooted by taking the 96 pin LVDS off one at a time to see if I had a picture on either side. I finally fixed the reboot cycle by finding the error on the left side of the screen off connector CN 1301, and the TV would stay on. Further troubleshooting led me to the driver boards where...
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