Given its weight and high-density interior, the AVC-A1SE is notoriously difficult to take apart. The service manual provides step-by-step instructions for: Removing the outer casing without damaging the finish.
Protection circuit triggers (often caused by DC offset or overheating). Initialization errors in the digital control logic. Troubleshooting: Factory Reset Procedure Denon Avc-a1se Service Manual
Release the buttons once you see flickering on the front display. Where to Find the Manual Given its weight and high-density interior, the AVC-A1SE