If you think you are having trouble with your Q-wiz EEG, the first test to do is check with no sensors attached.
1. Download the design for testing the Q-wiz
2. Select and Right-click on the zipped file and select Extract All
3. Open the design:
4. Select 4 Channel mode and Test Tone Helper option.
5. Disconnect all electrodes from the device before continuing.
6. Press Capture/Play and watch the signal.
The signal should cycle from low to high frequencies.