Ok,
First let me say sorry if I'm posting this in the wrong place I'm new to this place..
So I've been out of the car audio game sense 05 other than installation of brand new equipment in my own vehicles..
Well I'm trying to help my neighbor. He fixes and sells car's.
Well on 1 of the cars the battery went dead and from there on out all the HU displays is
Program start up error
I tried to do a hard reset but that didn't solve the issue..
I been reading on here about test mode..
Is that what I should be trying next? and farther more will it
