Acer S191HQL Service Manual page 40

6.4 Check the firmware version.
S1. Connect VGA source to monitor and turn it on.
S2. Pressing "e" and power on, when the screen lights, release the key and press "MENU" again to open the menu
with "F" and select "F" to open factory menu.
S3. Restart the monitor. And then open the user menu. Factory reset will turn off Burn in mode.
38
Check
this F/W
version.