A D.C volt tester. Just something that can read D.C and 12 volts.
They could over heat.
If you mean computer techs to help with computer problems, most do not. However most office supply companies should have a customer support department.
The Tunderbolt Interface, which is also known as the Light Peak is a hardware unit that allows several connections to a computer. A major advantage of this unit is that it utilizes copper wiring. Copper wiring is beneficial for sufficient power supply.
Any of the physical components that make up the computer. motherboard, RAM modules, CPU, drives, interface or adapter cards, power supply, etc.
I am not sure why 2 things... What you need is powerful enough power supply, enough space in your computer case and good ventilation to prevent overheating. And a compatible interface.
usb and firewire
If it is a computer power supply it is the box that gives the computer its power from the outlet.
In order to supply power supply to your computer you would need an outlet plug near your computer. Then you can plug your computer into that and necessarily, use an extension.
Usb and firewire
USB and FireWire
The "power supply" supplies power to a computer. A computer's power supply is a "switchmode power supply" responsible for converting the AC voltage from the wall into several DC output voltages.
The power supply makes the computer run, without any type of power supply it would be impossible to run a computer. The mains power supply for a laptop and the power supply unit of a desk top, both convert the high AC voltage from the mains power and convert it to low voltage DC, for the electronics of a computer to use.