You are here:

TV/VCR/Stereo Troubleshooting/Samsung HDTV LCD 40; BLACK SCREEN, NO POWER


My Samsung HDTV, Model LN40B630N1F10H went black, while watching; total power loss. Will NOT show ANY indications of power when plugged in, or otherwise.  I have REPLACED the Power Board; BN44-00264A; did NOT solve anything.  I bought, and replaced this myself.  I'm trying a board at a time, if this is worth saving. Any suggestions?  Tried both remote control, front screen power buttons, and a different power cord.  NO HELP. Thanks.

This model has a history of bad capacitors that can be at the cause of your problem.  In which case replacing the boards will not solve the problem.

Quit frankly, if it were my decision I would replace the set with a new model.  They are getting less expensive every day and your model is getting quite old.  You could end up spending $$$ on new boards and still not get it working.

Replacing the caps is an advanced technical matter and unless you are experienced with small parts replacements it may not be a good DIY for you to undertake.

WIsh I have a better answer for you!  

TV/VCR/Stereo Troubleshooting

All Answers

Answers by Expert:

Ask Experts




Consumer Electronics of all kinds. Audio, esoteric audio systems and components, video, tv. Digital equipment for consumer use. Ham radio and automotive electronics. Note: I give advice on tv repair based on general consumer electronics engineering experience but I am not engaged in actual repair of sets. MAKE SURE YOU GIVE THE MAKE AND MODEL NUMBER AND AGE OF THE SET. BE SURE TO CHECK YOUR EMAIL FOR THE RETURN ANSWER DURING THE NEXT 24 HOURS AS I TRY TO REPLY TO ALL QUESTIONS WITHIN THE SAME DAY IF NOT THE SAME HOUR.


Electrical Engineering; recording, broadcasting, design, international standards, tv and radio theory and practice.

FELLOW of AES (Audio Engineering Society)
Senior Life Member of IEEE (Institute of Electronic and Electrical Engineers)
International Consulting Organization

IEEE Spectrum
Various Consumer Electronic publications


Awards and Honors
Famous Engineer for Digital Audio

©2017 All rights reserved.