Originally Posted by Cube
You have to add a second relay that is activated by something on the laptop, i.e usb, power on indciator lamp or something similar. When the laptop is on, it activates that relay and breaks the circuit of your current design and prevents it from sending the 'short' again. Here's the diagram.
Oh, and I used a 1000uf electrolytic (sp?) capacitor. Gives about 1/2 second short. For the resistor I used was 10k ohms. Check out my sig :-)
Also, the second relay, since it has to be powered(activated) off a lower voltage/current from the laptop like usb, you'll need a relay that also is activated by the lower voltage.