Which Replacement Power Board for LNT4665F Samsung LCD TV?

I don't have the service manual for your set in front of me but I believe this sound is coming from the inverter board, the set takes 24 vdc from the power board into this board then increases the voltage to about 600 volts to drive the CCFL tubes in the panel, a guess would be you have a bad xfmr that is arcing on that board.

Samsung 46" LCD TV (LNT4665F) turns off and on over again - Forums ...

www.cnet.com > Forums > Samsung

CNETJun 11, 2015 - About 3-4 months ago, my TV would start turning off and on a few times at startup ... Samsung 46" LCD TV (LNT4665F) turns off and on over again ...chirp would sound and then it would power off and the cycle would continue. ... After 5-10 minutes of this without being able to shut it off completely, I pulled out the power cord. Samsung UN55B8500 - turns off by itself! - Forums - CNET
Nov 16, 2011
Samsung LN46A650 green/pink static picture and power resets ...
Jul 27, 2010
More results from www.cnet.com

How to fix clicking samsung tv (wont turn on) - Instructables

www.instructables.com/.../How-to-fix-clicking-samsung-tv-...

Instructablesif your looking at this then you probably have a samsung tv thats broken. This instructable is for how to fix one of the most common faults in samsung LCD tvs. .....its fine and never goes off until it is shut off but will not turn on immediately . ... The issue with my LN46A650A1F just started happening last weekend (12/7/2014).

SAMSUNG TV REPAIR- TURNS OFF RANDOMLY - YouTube

? 9:24
https://www.youtube.com/watch?v=7Rj22VNhKXg
Jun 25, 2012 - Uploaded by Tampatec
EASY HOW TO FIX SAMSUNG TV- TURNS OFF RANDOMLY Clicking ON AND OFF Repairing Samsung LCD No power problem LN ... LCD No power problem LN MODEL LN46B500 - buy the cap kit for your tv model ...

Easy fix for new Samsung TV switching on and off power ...

? 4:41
https://www.youtube.com/watch?v=H0cG3lzjuw8
Sep 15, 2012 - Uploaded by alwaysafix
Easy fix for new Samsung TV switching on and off power cycling.... My tv turns on and off by itself the ...

Samsung 46" LCD TV (LNT4665F) turns off and on over again -

Hi,
Unfortunately capacitors have been projected as a cure to all possible problems in an LCD tv by some you tube experts. The actual problem may lie in the power board or the main board. An expert is needed to check and find the actual culprit.

This TV is known for powersupply failures and this can be effecting the incoming voltages into the mainboard (AKA tuner board). This would cause the noise. Please have someone look into the powersupply and check that the proper voltages are coming from it. If they check out ok, you need to replace your mainboard.



Please rate if this helped :)

It sounds like you did not properly reinsert the ribbon cables, also verify that you do have 12vdc feeding the T-CON board, you may have to clean the contacts on the connectors also.
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

i've seen this several times. the power supply board is starting to fail. next symptom will be it will not turn on. call 1-800-samsung for nearest service center.

Dear Gary,

It sounds like you have a Power Supply Board problem. The PSB is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.

Thanks for using FIXYA, BIG IRISH.

We have the same problem with our 46" Samsung LCD Tv LNT-4665F. It's only 2 years old and unfortunately it's out of warranty too. Our tv would not power on and just does this clicking sound. We called to get it serviced and we will need to pay $95 to have somebody comeout and diagnose the problem or we bring it to the shop and pay $50 to diagnose the problem. we've never had any problem with our SONY TVs. we regret buying Samsung!

Unplug for 30 seconds from it's power source and then try it again. If that doesn't work, call Samsung for further troubleshooting and have your model number and serial number handy. Please be prepared to tell them how long the line is.