The possibilities are these:
- You pulled one of the ends loose when you rerouted the cord.
- You damaged the cord (or got an end dirty) when you rerouted it.
- You changed a setting on some piece of gear (either the TV or receiver).
- One of the devices suddenly stopped working properly.
4 is, by far, the least likely of these. I would check them in the order I presented them.
Are you getting sound from other sources, such as the tuner (make sure an antenna is hooked up)? If not, then you should start looking at # 3 in my list (which you probably want to do anyway).
sdolean..On speaker select in tools..did you try both External Speaker and or External Speaker?
On my UN55F8000 using my older Denon 3802 I had to use External Speaker..Using my new AVR it's Receiver..
This w/ using Optical
AVR Marantz SR7008
Mains Paradigm Monitor11 S7
Center Paradigm Studio CC-590v5
Suround Polk RM2300
Sub Rythmik FV15HP
LED Samsung UN55F8000
Since you are getting sound from the radio, if there is a setting wrong in the receiver, it is most likely you not selecting the right input for where the TV is hooked up. Many receivers allow, for each named input, more than one actual input (e.g., analog and digital). If, for example, you had the TV hooked up to the TV input via optical digital, but for the TV input, you selected the analog input, you would get no sound, because you have nothing hooked up to the analog input.
You might want to read the manual for your receiver carefully. You can likely download the manual from the manufacturer's web site for free if you lost the original.