Acer AT3720A AT3720A Service Guide - Page 67
HDMI Cable, plug in ?, Check HDMI cable or, Replacement HDMI CABLE, Read EDID DATA, EDID Data, Sound
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Page 67 highlights
12. HDMI no sound L HDMI Cable plug in ? Read EDID DATA EDID Data normal ? Sound output? no Check HDMI cable or Replacement HDMI CABLE no Write EDID data no Replacement Main/B END Chapter 4 61