Final answer:
A catastrophic failure in a computer system's power supply may manifest as an inability to start the computer, odd noises, a burning smell, or visible damage. Such failures can severely impact business operations and revenues.
Step-by-step explanation:
An indication of a catastrophic failure in a computer system's power supply can include several signs, such as the computer not starting, strange noises coming from the unit, a burning smell indicating a component has overheated or short-circuited, or visible damage like burnt components or smoke.
In a business context, the failure of computer systems can have serious repercussions, potentially leading to downtime, loss of data, and impacts on customer service, which ultimately could affect revenues. Immediate action should be taken to address the failure and restore system functionality to mitigate the impact on business operations.