Re: Safety precautions and power safety.
true, you can flip the magic switch on the back of the power supply, but whatever you do, you should always make sure that you cut the power to the motherboard somehow, it can get damaged. and always wear and esd strap, and if you take something out to work on it, make sure you work on a properly grounded static mat.
When all else fails...Ham Radio!
I still have the same old HP DV9700T laptop I've had for years...still kickin'