u/Character-Golf-5291

Trying to control a Samsung QH75C commercial display via RS-232 from a Q-SYS NV-32 and can’t get power commands working.

Current setup:

• Samsung QH75C
• Q-SYS NV-32
• Direct RS-232 connection (DB9)
• Display ID set to 1
• Serial settings:
  • 9600
  • 8
  • None
  • 1

Commands being sent as Hex Bytes:

Power ON:
AA 11 01 01 01 14

Power OFF:
AA 11 01 01 00 13

I also used these commands [POWR1]\x0D and [POWR0]\x0D

I already verified:

• Q-SYS is transmitting now
• Hex mode enabled
• No CR/LF being added
• Tried swapping TX/RX
• Not using EX-LINK, using direct RS-232
• Samsung commercial display, not consumer TV
• Tried different BAUD Rate too up to 115200