EDIT: Originally posted on StackOverflow but removed due to off-topic. One suggestion was that the backlight needs replacement. I am yet to try that solution.
I have recorded the issue in this video
I would include system specs but the fact that this happens to the monitor even when it is detached from any of the computers I have tried it on makes me suspect that the issue is with the monitor itself rather than with any of the systems.
Screen model: Samsung 206BW
Screen type: GH20WS
I received this screen from my colleague who would've otherwise thrown it away and it worked ok in the beginning but then the above issue started happening. The screen is turned on but is completely black and once every 3-4 seconds it flashes really quickly and then goes black again. This happens regardless of the screen being connected to a computer or not. When this started happening I would just wait it out as it would turn on after about 5 minutes. When this didn't work I started switching between 2 monitor display (extended screen) and duplicate screen and it would eventually work out (I hardly think that this is the reason it worked as it probably would've worked if I waited long enough but superstition).
I was told that it could be the monitor cable that is either damaged or loose but the video above where I filmed the issue is when the only thing that is connected to anything is the monitor to the power outlet which removes that possibility as well.
I've been wildly guessing on other likely issues but since I'm no expert in this I ask you; do you have any suggestion as to what the issue might be and what I could do to resolve it?
EDIT2: This is the inside of the circuit board. It looks like the capacitor on the upper left on the first picture is broken and I will try to replace that. Are there perhaps any other parts that seems broken as well?