IhaveaseriousproblemwithSu

So I recently got a Subaru and while everything from the engine to the trim is running good, it has one issue, which are the interior center dash LCD screens which are dead (Clock, A/C). The Legacy's running a Aftermarket Radio which works (barely) and an Aftermarket Cazzio (Dead), but the weirdest part is that the A/C unit works without any problems (just a dead LCD screen) I've checked the cables with a Polarity, and their sending power. I've also checked the Circuit board of the clocks LCD which looks completely normal. I have been told that it might be the internal computer, but I have no idea, has anyone had this issue?