"Trouble-Shooting" tools and "Repairing" tools are actually different tools.

These tools are available from numerous vendors, among the vendors are Fluke, Jensen, Techni_Tool, etc.

Tool kits for "repairing" PCs are available from $15.00 to $500.00 or more. I would recommend a kit that costs around $150 - 300.00. These kits will include at least the following:

1. Nut drivers - 3/16 and 1/4 inch.
2. Screw drivers - small and medium sizes, phillips and flat-blade types.
3. Chip extractors and inserters.
4. Tweezers and screw grabbers.
5. Needle-nose pliers (small and medium sizes)
6. Hemostats
7. Wire Cutters (small) and Wire Stripper.
8. Torx drivers - I haven't seen any need for them yet.
9. Small vise or clamp
10. Small file
11. Adjustable desk mountable light and small flashlight.
12. Soldering Iron - high quality adjustable.
13. Static grounding wrist straps.
14. Cable Tool for network wiring - COAX and twisted pair to RJ45 cable connectors.

Devices for "trouble-shooting" computer electronic circuits and networks should also be available. I agree that in most cases you will send a computer off for repairs; however, some tools such as the following may be useful:

1. Loop Back Connectors. (9 pin and 25 pin)
2. Cable Scanners (For Network Wiring include 10Base2 and 10BaseT connectors or more).
3. Ohmmeter/Voltmeter/Multi-Meter
4. Break-Out-Box (BOB)
5. Logic Probes and Logic Pulsers
6. Outlet Testers
7. Memory Testers (SIMM and DIMM if available)