This is a very common problem with that version display. It was usually the power brick actually. There is a short cut... but it may be a fire hazard in and of itself. The power brick doesn't put out as much juice and the display thinks there isn't enough current and starts the dreaded coded flash.
I did the paper trick and it worked... but I only used it till I got another display.

All sizes of those lucite monitors had this problem.

I have 2 torn down in the back room of my studio ... on a shelf. What a waste.

A society grows great when old men plant trees whose shade they know they shall never sit in.