Samsung UN46ES8000 - continuous power on/off and random display output - easy fix

[ngth82]

Hi all -

Perhaps this will help someone else down the line.

I picked up a Samsung UN46ES8000 today. All the caps appear to be fine, but the unit powers up and displays a funky pattern, then it turns off and rinse and repeat.

I looked at it closely. It appears the two 5V pins on the power board side are burnt on the 20pin ribbon cable on pin 17 and pin 19(See pics). On the power board side, it measures 5.12V, on the main board side it's closer to 5.0V. 100mV of drop across this cable was enough to cause the TV to turn off.

I ended up cleaning the cable pins and the power board pins to remove any corrosion. I also ended up rotating the cable 180 degrees which connects these two pins on pins 1 and 3 -- these are low current pins (PS_ON and BL_ON).

If needed, eBay sells this cable for ~$30.
Alternatively, if this problem shows up again down the line, i'll just solder the 5V ribbon cable leads directly to the 5V pins on the power board.

I now have a TV that was $2699.00 MSRP in 2012 for free. And it only took 15 minutes of investigation.

Time for hours of burn in testing!

Cheers!
-Thomas

[budm]

Re: Samsung UN46ES8000 - continuous power on/off and random display output - easy fix

Samsung Bulletin for UE too. Poor quality parts.

Also see page 13 of the second PDF for your model.
'5Samsung May 2013 Tech Talk Newsletter.pdf'

[budwich]

Re: Samsung UN46ES8000 - continuous power on/off and random display output - easy fix

i wonder if this type of issue might be appearing in some of the other samsungs especially in and around the one connect type ones... the "5v" stuff would likely be "travelling" in that direction also. Not saying that it would impact the actual one connect box but impact how "stable" the main board is. IF the connector is the same for these types of sets, might be worth the "try".

[ngth82]

Re: Samsung UN46ES8000 - continuous power on/off and random display output - easy fix

Thanks for the PDFs budm! I didn't know that there was a service bulletin out for it.

Good to know

[ngth82]

Re: Samsung UN46ES8000 - continuous power on/off and random display output - easy fix

6 month update: I still own this TV and it works great. It's used as our picture album TV above the fire place.