LG 27BN550Y Owner's Manual page 23

HDMI Timing (Video)
Factory support mode
Horizontal Frequency(kHz)
(Preset Mode)
480P 31.50
576P 31.25
720P 37.50
720P 45.00
1080P 56.25
1080P 67.50
Power LED
Mode
On Mode
Sleep Mode
Off Mode
Vertical Frequency(Hz)
60
50
50
60
50
60
LED Color
White (For a few seconds)
Off
Off
HDMI
O
O
O
O
O
O
Recommend Mode
23