Yes, it is an AMOLED screen, but they have similar symptoms when cracked. So I'm still pretty certain that it's not the display screen that is cracked. Here's the only pic I could find of a cracked AMOLED:
Nexus One mystery: How did our screen crack? | Crave - CNET
And it looks like the instructions I found were just the Instinct, not the InstinctQ. But there they are:
Rapid Repair - Samsung Instinct Take-Apart-Guide by RapidRepair
But I'm going to take mine apart, and I'll try to put pictures up here.