First I had the "click of death" - TV did not turn on. Then I replaced faulty capacitors and cleaned up soldering joints (power supply). Power supply was fine for a while - and then when hot the picture would go after 15 minutes or so - but the sound would stay on. Where do I start looking? Power supply or Y-sustain or Y-buffer or what? Or do I just get a big hammer and beat the thing to death?
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Re: Samsung PS-50C91HD - after 15 minutes picture goes off but sound stays on.
You could check what voltages are failing when losing the picture after 15 mins.
Use freezer spray to cool down components to try and isolate the component causing the problem.Willing to help but I'm no expert. -
Re: Samsung PS-50C91HD - after 15 minutes picture goes off but sound stays on.
also check the soldering on the psu on any components mounted on the heatsinks as they have a habit of cracking around the solder joints even if look good maybe worth re flowing them with fresh solder.Comment
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Re: Samsung PS-50C91HD - after 15 minutes picture goes off but sound stays on.
+1
Plasma do seem to have problems with dry or cracked solder joints so I would meticulously check all the boards for any defective joints. The effort could prove worth while.Willing to help but I'm no expert.Comment
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Re: Samsung PS-50C91HD - after 15 minutes picture goes off but sound stays on.
Thanks dick barton and vinceroger69. It does seem like it could be failing voltage to the Y-sustain board - and I have already re-soldered one of the components (transistor) on a heat sink. It was so loose that it was sparking. I will check the voltage and also the soldering. Would a Y-sustain board be OK when cold - but when hot not work?Comment
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Re: Samsung PS-50C91HD - after 15 minutes picture goes off but sound stays on.
Yes, this can often be the case. Again due to poor solder joints, a failing component or component going out of spec when hot.Willing to help but I'm no expert.Comment
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Re: Samsung PS-50C91HD - after 15 minutes picture goes off but sound stays on.
parts some time heat up when hot and shrink when cool hence working for a time period so when cool makes good contact and works, when gets hot/warm solder joint expands and breaks contact thats my theory.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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