Im not sure what to plug in where (excluding the speakers) help!!

Open up your computer the speakers plug/outlet is usually at the back of the computer
to check the lead attached to the rear of the input plug make sure the connection is good
or you might have to clean the dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the CPU central processing unit and your sound card dust causes static to build up in a computer causing it to overheat any many other problems
if this fails to fix the problem you might have to uninstall your soundcard restart your computer then reinstall it

click start control panel administration tools computer management device manager scroll to sounds and video controllers expand right click select uninstall
then restart your computer and reinstall your soundcard
hope this helps

you will probably have to buy some 2 to 1 input plug adapters and set them up
i cant see your television so im not sure of its speaker set up
hope this will help you

is the rem terminal connected to the blue/white wire coming from your head unit?

there is a speaker socket behind the tower

There should be a green color cable (3.5mm in size) coming out of one of the speakers. That cable connects to the green color port in the back of the computer.

If your still having trouble please comment back with the model of the speakers... Altec Lansing Series 100 Model ??? and brand name and model of the computer. If it's not a brand name computer but a generic PC, then the brand name and model of the motherboard.

http://www.gigabyte.com.tw/Support/Motherboard/Driver_Model.aspx?ProductID=1929 download the sound drivers

I would suggest first to unplug it completely and plug only the power,ground, and remote and see if you get your beloved green light again.

If this indeed gives you the green light, it means that the amp is protecting itself from a short circuit caused by the speakers, check the speaker cables or the speakers themselves..

if this remains the same, it'll be internally in the amp's circuitry.. unfortunately, it'll be dificult to tell you exactly what failed in it.

Plug in the green cable to the green plug. To plug in the rest of the cables you will need to buy a 5.1 or greater sound card.

im pretty sure that there is no possible way to fix those speakers but new ones will work just fine. (ive had this problem but different circumstances) Hope i helped!

Based on the fact that you have put a headset in and another speaker system and it is working properly there is nothing wrong with your windows settings. I would leave them alone. The issue appears to be with the hardware. Have you attempted to plug the speakers into another source (ie. cd player, ipod, etc)? If you plug them in there and they don't work, take the speakers back and have them exchanged. If they're not under warranty you're going to have to either get them fixed or replace them. Good luck on this one! JC