[Arcanum-XIII]

Not all DMM have probe small enough to connect to the lane. If it's even possible. What's more, you need to know where to put it, which can be daunting without the proper knowledge. Switching hardware is easier, faster and often the best solution in those case.

Finding hardware fault is hard. Tracing it is even harder.

[userbinator]

I think there's something wrong with your DMM probes if you can't measure the ATX power connector with them.