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Components adjusted/fixed:
R135
C61
changed R7(4.7k → 1.21k)
Flashed controller board using, PSU testing (13.5 V, 0.8 A limit):
power_distribution
automatically detects as rear board (in minicom)
LED27, LED23, LED4 blink on and off
VBAT: ~13.5 V
Potential component issues
V1 (3V3):
R80
bergstak pins
R102
R132
V5:
bergstak pins