PC Diagnostics Software

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We Listen To Our Customers and this is what they have said: Our customers have asked us to include additional more practical PC testing tools in our Professional Technicians Kits, other then loopback test plugs they can build their selves and many times they don't even use. So, with that said we now include additional Motherboard Test Cards for both desktops and laptops, Power Supply Testers and Cable Testers as well.

Loopback Plug Set Diagram:

Many of our customers have asked us to include a diagram so they could build their own Serial, Parallel Port and Printer Port test   Loopback   plugs if they require them. Loopbacks are used to test and diagnose if your ports are working correctly. You can find Loopback plugs on line at companies such as L-Com and there are many other companies out there as well.

Parallel Port, Serial Port and Printer Port external loopback testing requires the following plugs below.

Loopback Plug Wiring Diagrams connect pins as follows:

  Serial Loopback Plug, DB9 female, connect 9 Pin
  02 to 03
  07 to 08
  01 to 04 to 06 to 09

Parallel Loopback Plug, DB25 Male, connect 25 Pin
02 to 03
04 to 05
06 to 08 to 20 to 22

Printer Loopback, connect wrap plug pins
01 to 13
02 to 15
10 to 16
11 to 17
12 to 14