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I purchased 4 of these used. 3 of them power up properly - an on screen display message window reports "waiting for input signal". 4th unit comes up and immediately begins displaying solid colors one after the other [3 seconds per color]:
Then, repeats this cycle.
I have powered off and unplugged for 5 mins attempting to make it go dead and reset / default. No luck.
Thanks - can't return them. But it sure seems that all the basic functions are good - and i'm stuck in this diagnostics mode.
I even have a vague partial memory that this unit had powered up properly - but the backlight/brightness had seemed low turned down. So, I started pushing the 3 front panel buttons trying to get the config screen to come up so I could turn brightness up. I feel it's moderately likely that this button pushing sequence had caused the monitor to go into this color flipping/diag mode.