I have a Samsung ln-t4061f that would just click when you tried to turn it on. I pulled off the back and saw that 4 caps were bulged. I ordered the replacement caps and installed them, when I plugged the tv back in it made a startup sound and went to a black (but back-lit screen). It will then shut itself down after about 10 seconds and then try to reboot again after about 5 more seconds. Any advise?
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Re: Samsung ln-t4061f stuck in rebooting sequence
Always a good starting point when asking for assistance.
https://www.badcaps.net/forum/showthread.php?t=39740Willing to help but I'm no expert. -
Re: Samsung ln-t4061f stuck in rebooting sequence
sorry, dick barton. I will get some pics up, but I already replaced the bulged capsLast edited by engelwood39; 04-23-2017, 10:33 PM.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
Might try unplugging t-con and see if it stays on.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
When I unplugged the T-con it didn't change anything.
Here are the pics. I put yellow arrows to the caps that I replaced with these caps:
http://www.ebay.com/itm/172024725260...%3AMEBIDX%3AITAttached FilesComment
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Re: Samsung ln-t4061f stuck in rebooting sequence
Check rectifiers on cold side around where you changed capacitorsI assume no responsibility for any stupid suggestions I might post.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
What voltages do you have on CN801 when it first comes up and when it goes to black.
Check the soldering on T1801 for poor joints.Last edited by dick_barton; 04-24-2017, 11:43 AM.Willing to help but I'm no expert.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
dick_barton, I sent a picture of the solder joints on T1801. They look pretty good to me.
I also sent a picture of CN801 (2nd picture). It has a 24 pin connector to it and I'm not sure what you want me to test on it? Also does the ribbon cable need to be plugged in when I make the tests?
The 3rd Picture is of connector CN1801 and CN1802. I was wondering if that was what you maybe were wanting the voltage on instead of CN801?
Hey dskall, I am not sure how to test the rectifiers. Could you let me know what I should do to test them and where they are?Attached FilesComment
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Re: Samsung ln-t4061f stuck in rebooting sequence
Isn't this model known for bad caps which in turn corrupts the firmware on the main board?Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
+1
The previous threads do indicate bad capacitors and there are repair kits out there on Ebay so may be a good starting point to replace existing capacitors.Willing to help but I'm no expert.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
I replaced the capacitors that were bad already. I replaced all four that are included in the Ebay repair kits. These are the capacitors that I used instead of buying the more expensive kit. They have the same ratings and were pretty popular on BadCaps preferred capacitors thread.
cliff_hootarski, Does that mean that replacing the capacitors may not be the fix? I may need to replace the main board?Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
Would need good pictures of front and back of mainboard to see if this is board with that problem.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
Here are the pics of the main board dskall.
Dick Barton, Do you suggest that I replace all the capacitors on the power board? Also were you able to clarify what point you wanted me to test voltage at? Was it the CN1801 or CN801? (The attached pictures with those close up are on the post 6 up from this one)Attached FilesComment
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Re: Samsung ln-t4061f stuck in rebooting sequence
Not a board I am familiar with having bad capsI assume no responsibility for any stupid suggestions I might post.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
CN801 I think it's marked. There's a legend on the board naming the pin out so if you could provide the voltages alongside could prove useful.
http://www.ebay.co.uk/itm/Repair-Kit...-/230579176045
You may have an EEPROM problem if the set is rebooting but it's best to check the voltages are correct and caps have not failed first.Attached FilesLast edited by dick_barton; 04-26-2017, 03:01 AM.Willing to help but I'm no expert.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
This is what I was thinking of when I said bad caps (on the power supply) could corrupt the eeprom data.
https://wiki.samygo.tv/index.php/UnB...y_EEPROM_Reset
However, I don't see your TV listed.Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
does heating or cooling the boards alter anything?Comment
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Re: Samsung ln-t4061f stuck in rebooting sequence
Here are the voltages:
Power on/off: 2.78V
STB 5.2V: 5.233V
12V: 11.95V
5.4V: 5.38V
13V: 12.95
Just to clarify what is is doing: It plays a start up tune (i think its a startup tune) and then the backlight comes on with nothing displayed. It stays illuminated for approximately 30 seconds when it shuts down for a couple seconds and then starts the cycle over again back in a loop.
I already ordered the Ebay kit that has all of the caps that are on the board. Not sure it that is a waste of time at this point? Here is the kit:
http://www.ebay.com/itm/330524305728...%3AMEBIDX%3AITComment
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