Synths and keyboards: wear, connections and display

Add details of:

• yellowed, damaged or marked keys;
• encoders;
• faders;
• buttons;
• joystick or wheels;
• display;
• rear ports;
• power connection;
• panel scratches;
• damaged side panels.

If the display has lines, defective pixels or dim areas, photograph it powered on with an exposure that makes the issue readable.