Power status for PCS500

The power “ON” light located on the front of the unit is always on, even when the PCLab software is not running. Is this correct? If not, how do I fix it so that the unit is not drawing power when the software is not running. Thanks.

[quote]The power “ON” light located on the front of the unit is always on, even when the PCLab software is not running. Is this correct?[/quote]No, this is not correct.
It seems there is something wrong with the power on/off control circuit.

Some of the components in this section may be defective:

The circuit diagram for the PCS500 is on the CD in the folder: d:\Technical info\PCS500 2ch PC scope
Or you can use this link to download the complete circuit diagram and operation description:
box.net/shared/ybz9k9adq4