It's Fried.......
Like a bad piece of KFC chicken.......
From being wired incorrectly, either by your guy, or the person you bought it from.
The vidio board has went by-by, and APEX does not sell parts for electronic products.
I learned my lesson the hard way, to Never buy one of those, unless the seller shows it fired up.
When I need one, I only buy from someone who shows it powered up, with the same back ground in the picture, as the non-powered up unit.
And not in the dash of a car, because you never know who's car that picture is from.
Too many pictures posted on the web that a con-artist can down load in order to sell his crap.
And if it is from another car of yours, and it was working, your guy is at fault