2007 monitor, 11 years old.
what lock? name it? the OSD menu button dead? why not say what is locked, or does lock mean dead screen./???
hold the button. down for 10 + seconds and release.(most mon./s)
lets read your manual.... bingo there it is.
btw first google hit, amazing no?
no button lock on this model.
so what does lock mean,
power on the monitor it glows and shows a logo
and tells you there is no signal if the data cable is missing
if during (no PC) monitor power on , you press the OSD buttons
you will get a OSD menu, from the monitors cpu brain.
if not the monitor is dead.
many 2007 monitors up to 2010
have CCFL back lamp, and most are dead now.
end of life dead, the flash light trick proves this on an stuck black screen (see data, yes, CCFL are dead) RIP.
https://www.manualslib.com/download/270479/Gateway-Fpd1975w.html
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