Teac A170S won't play, RW, FF, or record.

The manual is here, you just have to register at the site.

https://www.hifiengine.com/manual_library/teac/rw-cd22.shtml

More resources here

https://www.google.com/search?q=teac+rw-cd22+manual

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Check the power source with another item.
Check on the back for a fuse holder.
Take it for service.

A couple of people have the same issue.

https://www.google.com/search?q=Teac+RW-H300+won%27t+power+on

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You need new brake pads installed as the ones in there now are dried up and may have fallen off. This is very common with older decks or 30-40 years old.
I am still working on these decks at Skywave Tape Deck Repair in the Chicago area.

try recording from some other source like ipod or mp3, that will let you know if recorder is working

Go to the Teac website. download manual you should find the solution there. You may have set something to auto sync

The TEAC site seems impenetrable as far as just asking for a certain model number but you could give it a try. As a customer you could also complain that it isn't as straightforward as it should be.

http://www.teac.com/consumer_electronics/cd_players_&_recorders/

I have a Teac RW-CD22 and it keeps telling me there is no TOC> I am unable to record a disc.

You have to look for input selection and make sure whatever way your recording from is connected. If you doing digital to digital, make sure the optical line is connected and the other is powered on. if it's analog or input or other also the same. I think it needs to recognize the other device. This is info from my teac rw d200. I love this and also use these disc's and maybe they would work on yours. The CD's MUST be made for Audio Burners and I recommend these two kinds...The label below MUST be printed on the CD's in order to work.

these RW and all purpose are whatever you can find online. The RW just became discontinued. I bought some 2 years ago.

easy, download the software update from the teac website- had the same problem myself

The CD's are still available everywhere. ALL PURPOSE or AUDIO must be printed on the package