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On the ZD95GF’s tiny but powerful waveform generator, a clean 5V square pulse marched across the screen. No oscillation. No feedback. The fix was clean.

Check output capacitor. You see 0V. Your portable schematic reminds you: “U2 (AMS1117) – Input must be >4.5V.” Input is fine, output is dead. Replace U2.

: Often the primary cause of a "dead" unit where the board receives no power. Relay Sticking

: While the schematic isn't included, the device's Owner's Manual (usually found by the dryer or AC's model number) provides basic wiring diagrams for external connections like power and sensors.

: Be aware that schematics and technical documentation are often copyrighted. Use them within legal boundaries, and respect the intellectual property rights of manufacturers and creators.