Question concerning Samsung SyncMaster?

Q: I inherited a Samsung CRT SyncMaster model #750s manufactured in 2003, I don't have a computer handy, to check if it works, but I did plug the mains wire in to the wall and the screen saver 'box' came on indicating ;"check signal cable". Seems okay, nice colour but every several seconds it momentarily (fraction of a second) flashes, as if refreshing itself. Is this normal? All else seems normal.

A: i used to have the same model pete and it did it with mine so id say its normal pal

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