Driver Information Center

I’ve got an 04 Grand Prix that recently had the ignition cylinder replaced (new key, whole nine).

When I picked it up the Driver Information Center, the tiny screen above the radio that shows mileage and displays issues, was blank.

Turns out these things go bad all the time. I didn’t raise a fuss because I figured it would be an 3asy part to swap.

I bought a used one on ebay thay was verified ‘working’. Of course it didn’t. Anyone know a good way to test these things aside from plugging them in?

Anyways. Fuses for display look good so thats out.

Im not sure what to check next. If it helps the radio display is also having issues. I think I read the radio an DIC are connected in some way.

Any advice would be helpful.