How to get 13V-17V on the primary output of your CNX-2140 - Solution inside.
I just ordered a set from the mp3car.com store. They are basically jumpers you place onto the 2140 board in place of the 20V output to enable more output voltages. The standard options only allow 12V, 18.5V, or 20V, but with these jumpers you can get 13V, 14V, 15V, 16V, or 17V for whatever your laptop or computer requires. I had to buy the whole set but only need the 16V one so the rest are up for grabs.
In case you do need 16V, please remember that the vast majority of computers will allow a +/- 1V variation without any problems (I know because I've tried it out on a few old laptops). If you measure the output from your power brick, you'll notice that it doesn't actually stay right at what its rated anyways, and jumps around by about 1V.
I'd like to help the rest of the community out. If you need primary output voltage at anywhere from 13V-17V just PM me or email me at hari.trivedi at gmail.com, and I'd be glad to help. Best of luck!!