If the power cable is detachable, it should be a standard plug which is easy to find at goodwill, etc. or online. Very common cable for many home audio component. Probably look like figure eight. If not, you would have to open the unit.
Hi Bill, your Samsung TV, has digital audio output by fiber optic, to be able to connect powered speakers, they must have that type of input
You can connect this output to an amplifier with Digital Fiber Optic input and thus have the audio in the amplifier speakers
Another option is to use a converter of Digital Audio input (Optical Fiber or Coax) and Audio output by RCA
I send you the link of the D / A converter
I hope you can listen to your TV by external speakers
Greetings Franco Dosil
Hola Bill, tu TV Samsung, tiene salida de audio digital por Fibra ?ptica, para poder conectar parlantes potenciados, estos deber?n contar con ese tipo de entrada
Puedes conectar esta salida a un amplificador con entrada Digital de Fibra ?ptica y as? tener el audio en los parlantes del amplificador
Otra opci?n es utilizar un conversor de entrada de Audio Digital(Fibra ?ptica o Coaxil) y salida de Audio por RCA
Te envi? el link del conversor D/A
Espero puedas escuchar tu TV por los parlantes externos
Saludos Franco Dosil
http://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=UNI_MX&CttFileID=6033976&CDCttType=UM&ModelType=N&ModelName=UN32J4000AF&VPath=UM/201510/20151030153502738/J4000-ZX-BF_BN68-07180Y-00ENG-0728.pdf&OriginYN=Nhttps://www.ad-net.com.tw/product/2-port-rca-audio-1-stereo-fiber-optical-converter
Try unplugging it for 15 to 30 minutes and try again. Mine did this last year and unplugging it got it working again. I had to reconfigure the settings again.
It sounds like a settings issue. Either on the receiver or TV or both. Check that they can pass Dolby signals. It probably won't work on PCM. Some receivers have the option for different sound on various settings. For example the one for TV could be switched off or on a different connection socket than the one you use. For example it might be on optical, or RF, or HDMI.
Make certain that any Blu-Ray player connected is putting out the right signals. Sometimes they can have the option to "mix" signals for certain TV's. This however will kill the signals needed for Atmos.