Two years ago I purchased a Z-4000 on eBay. The seller claimed it had never been used. When I received it the unit appeared brand new. When I unpacked it I remember thinking it might not have ever been used.
I remember plugging it in but honestly might have just seen the green light and not looked at the meters.
So, I'm finally upgrading and pulled it out today. When I plugged it in, the meter does not light up.
Also when I first power it up, the red light stays on for about 15 seconds.