TVs & Home Theaters forum

Question

Samsung model#: un55ju6400fxza, No pic, no sound, just buzzi

I have a Samsung model#: un55ju6400fxza. Version#: fd05. When plugged in I get a red power light, but no picture and an electrical buzz from the rear. I opened the back and located the buzz coming from the power supply board, specifically from the silver heat sink looking block on the top left. When I disconnect the ribbon cable to the main board, buzzing stops and backlight/screen comes on. Is this issue with my mainboard or power supply board? I see no swollen capacitors or signs of issues. Thanks in advance for your advice.

Answer This Ask For Clarification
Discussion is locked
You are posting a reply to: Samsung model#: un55ju6400fxza, No pic, no sound, just buzzi
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: Samsung model#: un55ju6400fxza, No pic, no sound, just buzzi
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.

All Answers

Collapse -
Answer
How to tell.

In reply to: Samsung model#: un55ju6400fxza, No pic, no sound, just buzzi

You would get the service manual for that model and then follow it's instructions on what voltages to measure and then replace the board it calls out. It could be other than these two boards. I'm sure techs have found shorts on other areas but if you are guessing the advice is "replace the cheapest part first."

Service manuals for a lot of the US models is over at samsungparts.com

Collapse -
Answer
An Excuse to Improve

In reply to: Samsung model#: un55ju6400fxza, No pic, no sound, just buzzi

Sounds like time for a new TV. Fortunately you can get a better, more capable set in a 55" size these days for a remarkably low price.

Popular Forums

icon
Computer Newbies 10,686 discussions
icon
Computer Help 54,365 discussions
icon
Laptops 21,181 discussions
icon
Networking & Wireless 16,313 discussions
icon
Phones 17,137 discussions
icon
Security 31,287 discussions
icon
TVs & Home Theaters 22,101 discussions
icon
Windows 7 8,164 discussions
icon
Windows 10 2,657 discussions

REVIEW

Sublime suburban chariot

High on style and technology, the 2019 Volvo XC90 is an incredibly satisfying everyday crossover.