Depending on your monitor:
Solution 1
1. Disconnect power cord.
2. Press and Hold button 1.
3. Plug power cord back in.
4. If necessary, press power button while still holding button 1.
Solution 2
OSD and Power Button Lock Modes
OSD Lock This mode locks all current control settings and prevents access to
the control menus until this mode is unlocked.
? OSD Lock: Press and hold [1] and the up arrow for 10 seconds. If any
buttons are pressed the message OSD Locked will display for 5 seconds.
? OSD Unlock: Press and hold [1] and the up arrow again for 10 seconds.
See page 7 of this User Guide for further instructions:
http://www.viewsonic.com.au/support/manuals/files/LCD/Series%20X/VX715-2%20User%20Guide%20English.pdfIf you found this information helpful, please give me a big thumbs-up when you rate my answer. Thanks!
OSD lock should now be cleared.
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