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LG 86UN8570AUD RS232 Power On not Responding
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Post 1 made on Tuesday December 8, 2020 at 16:34
Junior Member
December 2020
We just installed a new 86" LG with a 3.5mm TRS service/control port connected to an Extron MLC64 serial controller. The control works for all functions except for the most important one: Power On

Extron thinks that the 1/8" TRS port is somehow being powered down like the USB based control, but this doesn't make sense since it should behave like a serial 3 pin serial port. LG has been useless -surprise.

Any Ideas? We have worked with other recent LG's with the same port and had no problems.

A/V Installer
Post 2 made on Tuesday December 8, 2020 at 22:30
Lyndel McGee
RC Moderator
August 2001
If there is an eco mode/green option, turn it off.
Lyndel McGee
Philips Pronto Addict/Beta Tester

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