How to organise a test without missing important checks

When testing used gear, follow the same sequence: identity, physical condition, power-up, core functions, secondary controls and behaviour over time.

Before connecting anything, inspect for damage, missing parts or obvious previous work. Then test essential functions using neutral settings rather than immediately relying on complex presets or configurations.

Next, verify the controls, inputs, outputs and features you actually intend to use. Where possible, leave the unit running for a few minutes to reveal intermittent behaviour.

Write down doubts instead of relying on memory. A methodical test helps distinguish a real fault from a configuration issue or a control you have not yet understood.