Which environmental condition should be avoided when working on computers?

When working on computers, excessive dust and debris in the workspace is a condition that should be avoided due to its potential negative impact on the internal components of the devices. Dust can accumulate on sensitive electronic parts, leading to overheating, blocked ventilation, and even component failure. It can also interfere with connections and other critical areas inside the hardware, leading to malfunctions. A clean working environment reduces the risk of these issues and helps ensure that the computer operates optimally.

In contrast, working in a well-lit area, a low humidity environment, and maintaining a stable temperature are generally beneficial conditions for computer maintenance and repair. Adequate lighting helps a technician see the details of the components they are working on, a low humidity environment helps prevent static electricity buildup, and a stable temperature ensures the components do not suffer from thermal stress. Thus, the focus on avoiding excessive dust and debris highlights the importance of maintaining a clean workspace to protect the integrity and longevity of computer systems.