I'm sure that your experience details will be different from mine. That's why my "three fails, then add" has been so handy. I'm getting into more and more network issues and failed modular power supplies. With a VOM I can quickly check the power supply and save hours of head scratching chasing after a "rogue" router that is simply starved for power.

I'm debating if I should simply add a 12V 2A power supply to my kit.