yeah those machines , including the CC can take a few seconds to light up.

i noticed the G3 AIO's those take a bit to light up too!

but The LC 5XX and the Color Classic if those have not had caps replaced, it needs to be done.

even if they are not dripping , if you look closely at the where the leads come out,  ( once you remove the caps )

there is almost always corrosion... or wetness around the spot where the lead exits the cap.