Re: samsung LNS4695DX TV Has blinking power light - No Picture
What does heating the board do ?
I have yet to replace the 50v, 10uf caps yet (in the mail today) but I have heated the heatsink at UB801. I just took my iron and placed on the metal for about 3 min and that allowed the TV to actually turn on. Just wondering what that mean exactly.
I then turned it over and hit those joints with some new solder thinking that there may be cracking there, but it didn't resolve.
dietzcj
Senior Member
Last Activity: 06-19-2018, 01:42 PM
Joined: 03-04-2011
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Re: samsung LNS4695DX TV Has blinking power light - No Picture
I am now working on this model as well, has any found where the typical soldering cracks are located. I have already replaced all of the larger caps, except for the 50v 10uf caps.
I may just spend one night hitting every joint with the iron.
Happy Holidays everyone !Leave a comment:
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Re: Samsung LN40A500T1F
Okay final post, I got my replacement power supply board and it is now working.
Thanks to all who helped me, I really appreciate it very much. BADCAPS Rules !!!!Leave a comment:
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Re: Samsung LN40A500T1F
I saw a you-tube video where someone was jumping 2 points together because the ccfl bulb was bad.
[url]http://www.youtube.com/watch?v=oE6K4xBVweA[/url]
What if I made a harness to plug in instead of the CCFL closing the circuit. That would bypass the light itself to just test each light individually.Re: Samsung LN40A500T1F<br /> <br /...lug in insteadLeave a comment:
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Re: Samsung LN40A500T1F
okay, I just tried it and it did not work.
I think I will try testing each bulb individually. If it is shutting down a broken bulb could be the issue, or the inverter card.Leave a comment:
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Re: Samsung LN40A500T1F
the 2 points in red ?...Leave a comment:
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Re: Samsung LN40A500T1F
try jumping the 2 solder points for the power button ? With a resistor or straight alligator clips ?Leave a comment:
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Re: Samsung LN40A500T1F
no relay clicks. But without the power button how is it turning on ?Leave a comment:
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Re: Samsung LN40A500T1F
So maybe try to bypass the on switch using the same technique ?
Btw, the main board is a BN94-02257A. and I have posted previous pics.
The connector from the power switch is (Pin 1-IR)(Pin 2-gnd) (Pin 3-stb3.3) (Pin 6 Key1) (Pin 7-Key2) (Pin 8-stb5v). So maybe try Pjn2 and Pin 8 with the 1k resistor ?Leave a comment:
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Re: Samsung LN40A500T1F
okay, mmartell.
Tried that also. Unplugged the speakers and then the power switch.
Should I still have the 1k resistors still jumped in at this point? Right now I have them removed from the previous experiment.Leave a comment:
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Re: Samsung LN40A500T1F
Yes, I tried just unplugging the Tcon board and it just blinks red light by the power switch.Leave a comment:
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Re: Samsung LN40A500T1F
I thought that when the backlights came on that the PSU was okay. Also I did not have the main board plugged in when I "Jumped" it with the 1k resistors.
Should I try that with it plugged in ?Leave a comment:
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Re: Samsung LN40A500T1F
I got the main board replacement today from amazon, but it still didn't work.
Not sure what I should do now, except ebay the boards and get my cash back out of it.Leave a comment:
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Re: Samsung LN40A500T1F
So you would just recommend that I get a replacement Main board ?
Don't worry, I won't hold your feet to the fire if you say yes and it still doesn't fix the problem.
I would just like your honest opinion.Leave a comment:
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Re: Samsung LN40A500T1F
Is there a way to troubleshoot the main board and T-con ?Leave a comment:
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Re: Samsung LN40A500T1F
okay, the result is that the back lights power on.
So that means that the power supply and the inverter boards are good ?
And the main board is bad ?Leave a comment:
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Re: Samsung LN40A500T1F
so like this ? See photo.
but the other end of the ribbon cables shown here should be unplugged from the Main Board....Leave a comment:
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Re: Samsung LN40A500T1F
is a half watt carbon film resistor 1k ohm the right resistor ?
I have both metal film 1 watt and carbon film.Leave a comment:
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Re: Samsung LN40A500T1F
so do I try it with the main board plugged in ?Leave a comment:
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Re: Samsung LN40A500T1F
Okay I will try that once I dig up a couple of 1k 's.Leave a comment:
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