A changing display needs a short sequence record. One photograph may catch only half the message, while a note saying "flashing" leaves out which text or light was involved.
Keep the order and uncertain characters
Write each group of characters in the order already observed, preserving leading zeros, spaces and punctuation. Note any blank interval and whether the sequence returns to its beginning. Mark an uncertain character as "unclear" instead of choosing a similar-looking letter or digit.
Describe indicator lights separately: give their printed label or position, whether they are steady or flashing, and whether two lights flash together or alternate. Record a sound separately if one was heard; do not guess a flash count from an incomplete observation.
An outline for the enquiry brief
Follow this outline: "Text in order: [first display] / [next display]; blank intervals: [seen/not seen]; lights: [label or position and behaviour]; sound: [if heard]; programme and stage: [if known]; result: [what stopped or changed]." Enter the observations in the enquiry brief with the full model reference. Leave unknown details marked as unknown.
Use observations already available
Consult the exact manual for the message and any stop-use instruction. Observe only through normal safe access; do not open an operating machine against its instructions or press buttons to recreate a warning. Never rerun a leaking, burning or electrically unsafe dishwasher to obtain a better record.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.