Trouble-shooting can be divided into two kinds of situations: repair and development.
In repair, you know that the equipment you are trouble-shooting did, at one time, work. Maybe a component failed. You need to find out what went wrong and then to fix it.
In development you are working on prototypes. When it doesn't work properly there are three possibilities. First, there may be a faulty component. Second, the breadboard or prototype wasn't built according to design. Third, there may be a fault in the design. Usually, there is a combination of all three in an early prototype.
HEALTH AND SAFETY
Don't do anything that may harm you, others, or the equipment you are working on. Remember that high voltage can cause burns, and a shock across your chest can stop your heart.
For this reason you are not allowed to work on your own in the Laboratories.
Anti Static Precautions
ESD sensitive devices may be protected by one of the following methods:
Grounding is achieved by connecting the work area, the operator and the items being worked on, to a known good grounding point with grounding straps.
Isolation and neutralization is achieved by using the conductive protection materials.
Work stations where static sensitive equipment is handled must be equipped with the following equipment:
Personal grounding straps must be worn in close contact with the skin and are usually fitted around the wrist. The function of this strap is to make sure the operator is at the same potential as the work, and the work surface. A 10 Mega ohm resistor is included in the ground wire from the wrist strap to reduce the possibility of a fatal shock occurring if accidental contact with mains voltage, or other high voltage source, should occur.
The wide range of static safe containers includes:
Make sure you have a reliable ground point available near the work site
Connect your body to the ground point with a wrist strap.
Ground all equipment you are working on with ground straps
Handle components only on a grounded anti-static work surface.
Do not handle static generating objects while working on your circuit.
Store all chips and other components in appropriate anti-static containers.
Keep all Printed Circuit Boards in anti-static envelopes until required.
Be sure to turn off the power and remove the power plug from all equipment before working on it.
Do not plug in or remove devices while the power is on.