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Search: Posts Made By: lfhlaw
Forum: Troubleshooting TVs and Video Sources 05-23-2022, 07:14 PM
Replies: 3
Views: 237
Posted By lfhlaw
60LN5600 white reflective sheet

So I had to replace the LED lights on this TV and that worked out nicely. But the White reflector sheet that helps to diffuse the led lights evenly was glued into the back chassis which had to be...
Forum: Troubleshooting TVs and Video Sources 03-21-2021, 01:31 PM
Replies: 14
Views: 3,507
Posted By lfhlaw
Busted/cracked Light diffuser plate Samsung UN55NU7100

I was attempting to replace the LED lights on an Edge-lit Samsung UN55NU7100...While removing the sheets and the light diffuser plate which already had cracks at the bottom. The plate bent(more than...
Forum: Troubleshooting TVs and Video Sources 02-18-2020, 09:47 PM
Replies: 5
Views: 962
Posted By lfhlaw
Re: 50UH5500 No picture/sound

Turned out that it was a bad LED strip.
Forum: Troubleshooting TVs and Video Sources 02-08-2020, 10:45 PM
Replies: 5
Views: 962
Posted By lfhlaw
Re: 50UH5500 No picture/sound

ok I can get a car light bulb, but not sure what you mean by put it on the 13v/0v outputs - the outputs on the power connector and just physically place it against the pins? Or should I purchase a...
Forum: Troubleshooting TVs and Video Sources 02-08-2020, 12:21 AM
Replies: 5
Views: 962
Posted By lfhlaw
50UH5500 No picture/sound

So I picked up this 50UH5500 the other day.

When I power it up, the main board gets power for brief second, the backlights flash and then power shuts down to the Backlights and Main.

Testing...
Forum: Troubleshooting TVs and Video Sources 10-23-2019, 10:14 PM
Replies: 19
Views: 1,581
Posted By lfhlaw
Re: Samsung UN50JU6500F Blank Screen Boot Loop; Clicking sound can be heard.

Back in March, I stumbled onto this same model of TV that I got for $50. I had to replace the Power board and the TV came back to life for me. I was a bit confused on the PSU testing but figured it...
Forum: Troubleshooting TVs and Video Sources 04-22-2019, 08:34 AM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Well. I did buy a new Power Supply board and that fixed the whole problem. still not sure what caused it to fail though...so a bit concerned that it might happen again after fixing it, but will see...
Forum: Troubleshooting TVs and Video Sources 04-15-2019, 07:42 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

okay finally got time to post.

PS-on is 3-4 Volts
pins 3,5,7,9 fluctuate from 8 v to 13 v
pins 4,6,8 still show about 3-4 volts.

the A13v and the 8V standby both fluctuate from 9 v to 13 v....
Forum: Troubleshooting TVs and Video Sources 04-10-2019, 02:32 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Ok I didn't realize I had the black lead on pin 2 (which I thought was pin 1). I tested it briefly this morning and got much better numbers similar to post#3. I will post the voltages and variance...
Forum: Troubleshooting TVs and Video Sources 04-09-2019, 09:52 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

This was with the PSU Separated from the LED and Main and just plugged into AC and PSU Flipped over. I was testing based on your picture you posted and that's what I got.

so the one pic. Was...
Forum: Troubleshooting TVs and Video Sources 04-09-2019, 07:25 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Ok I did the A13V which fluctuated from 4v to 8V. the 8V standby side had 0 Volts.

The Power-on with ground read little either 0.7 or 0 Volts.
Forum: Troubleshooting TVs and Video Sources 04-09-2019, 07:14 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Yes I'm still getting the same voltages as post#3.
Forum: Troubleshooting TVs and Video Sources 04-09-2019, 10:54 AM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Just Checking before I test again so i understand. You want me to re-check the Pin 8 - power on voltage correct to the main board with LED plugged in and AC power.

or something different?
Forum: Troubleshooting TVs and Video Sources 04-09-2019, 07:28 AM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

No the originally what I did was replace just the bad one FIRST and noticed the very dim blinking lights. Then I proceeded to replace them all to see if it made a difference.

I replaced all the...
Forum: Troubleshooting TVs and Video Sources 04-09-2019, 06:34 AM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

ok understood.

I Do not have tools to do surface mounted component repair. I was assuming we were testing to see if the board was bad or not. I can do simple repairs like capacitors, and maybe the...
Forum: Troubleshooting TVs and Video Sources 04-08-2019, 09:51 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

I had the Red lead on the A13V and the black lead on the TV metal chassis. Meter was set to 20V DC as was looking for low voltage of 8 and 13 v.
Forum: Troubleshooting TVs and Video Sources 04-08-2019, 09:45 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

5) I got about 98 v high and 88 v low over the 10 seconds plus with the LEDs connected , but Main board not connected with the Lead on negative of C9071 and CH1 test point.
Forum: Troubleshooting TVs and Video Sources 04-08-2019, 09:35 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

I'm not an electrician, so much of this feels very technical to me so bear with me.

I attempted to test the A13v standby by flipping the PSU board over and unplugging the LED and Main board....
Forum: Troubleshooting TVs and Video Sources 04-08-2019, 08:53 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

ok Diah wanted some additional pictures. Including complete set up.


as far as BudM's post...i might've tested incorrectly now that I saw the picture posted. As I Was testing it ...like my 2nd...
Forum: Troubleshooting TVs and Video Sources 04-05-2019, 03:41 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Unable to turn the TV off or on. But plugging in the Power into the AC cause the
Voltage from the C9701 and R3090 to cycle from 0 to 183 thereabouts.

I do get 3 v to the main board.
it appears...
Forum: Troubleshooting TVs and Video Sources 04-04-2019, 06:47 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

OK Replaced the panel and connected it up, but still no backlights on the panel showing up with or without the mother board connected.
Forum: Troubleshooting TVs and Video Sources 04-04-2019, 09:01 AM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Is this different from the regular LED TVs? because normally in "plain" LEd Tvs without the panel, the LED strips will still light up without the Motherboard being attached or Panel.

Is it a new...
Forum: Troubleshooting TVs and Video Sources 04-04-2019, 06:03 AM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

No I did not install the panel back in yet.
Forum: Troubleshooting TVs and Video Sources 04-03-2019, 09:58 PM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

Ok I did find a couple of bad LEDs and replaced All the Strips(From Shopjimmy). However, with the Main board unplugged, The LED lights are rhythmicly flashing although very dim.

If i plugged in...
Forum: Troubleshooting TVs and Video Sources 03-30-2019, 07:08 AM
Replies: 43
Views: 4,884
Posted By lfhlaw
Re: Samsung UHD UN50JU6500

ok will have to do that first.

In the old LED TVs normally you'd get a dark image....with no backlights but sound. Did the 4k TVs change in the way they process logic with bad LEDs?
Showing results 1 to 25 of 59

 
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