Samsung HT-TXQ120 home theater system sound card stoped working

SOURCE: Unit is smoking and producing burning plastic smell.

Here's how I fixed mine:

I modded an old fan to have the same connector as the dead fan, and slapped that in. That ended up being loud and having a large buzz, in addition to not pushing much air. So, I cut a 120mm circular hole in the top of the case, removed the shroud over all the capacitors, put the case back on, mounted a slimline fan and made a nice little chimney setup. not pretty, but that means i don't have to buy a new receiver.

Short of that:
1. take it to a repair shop.
2. Buy a new receiver.

SOURCE: rear check message on HT-TXQ120 samsung home theatre

Looks like it is to do with the rear wireless speaker. Now, my problem is over. Its gone. I first turned the reciever on and then turned on the rear speaker wirel less on. No rear chk in problem now. Hope this helps. R.

SOURCE: Hook-up Diagram for Samsung HT-Q70 Home Theater System

try to download the user manual here http://www.samsung.com/us/support/download/supportDown.do?group=audiovideo&group_cd=&type=hometheater&type_cd=03030000&subtype=hometheatersystems&subtype_cd=03030100&model_nm=HT-Q70&dType=D&mType=&model_cd=&menu=download&menuLink=/support/download/supportDown.do&prd_ia_cd=03030100&disp_nm=HT-Q70&isEqualsY= let us know. thanks.

SOURCE: Cooling fan stopped working.

http://www.samsungparts.com/search/search.asp

try to check all the accessories for your unit here

SOURCE: Samsung Home cinema HT-TXQ120 system won't read CDs and DVDs.

Hi.
I have had the same problem.
Just unplug the systme and plug it back in.