The screen is almost certainly running on ignition power alone. With a permanent 12V feed from the battery plus switched ignition, the system wakes in roughly 1 to 2 seconds. Without the permanent feed it cold boots every time.
Check in order:
- Permanent 12V. Measure at the connector with the ignition off. If it reads zero, that is your answer.
- Confirm the permanent feed is not switched. Some accessory circuits look permanent but drop with the key.
- Intro logo. Turn it off if you want the dashboard to appear immediately.
- Battery isolator. A vehicle on an isolator loses standby power every time it is switched off.
Related: Why Your Screen Needs Permanent Battery Power · Power Wiring: Battery, Ignition and Ground · Turning the Intro Logo On or Off
