This receiver is very hard to find as many of them their face go blank or dead due to age. There are guys prefer this over F1. I sold two of these last year.
Couple guys told me the same thing. Sitting for awhile and display went dead.I have one that I only used for a week or so. It was brand new, but didn't use it for a couple years. Display went out & the warranty was gone. I'll have to check to see if they still fix them.
Nice HU's though. I've had two other ones.