Hi! I have the same issue unfortunately :))) I haven't bothered getting a new cable as it seems that simply reseating the cable on the monitor side seems to fix the issue for some time (remove the 2 rubber thingys at the bottom of the monitor - on the upper part of the hinge; undo the screws, remove the plastic bezel on the monitor (I usually flex it from the side and I can pop it out slowly), unscrew the panel, remove and plug the lcd cable back in
If you want to change it you'll have to remove it entirely, and you can find a dissasembly tutorial on youtube, just follow the lcd cable onto the motherboard, take it off, put the new one back in :))) It should be fairly simple but extremely annoying :)))
Considering this thread is almost 3 weeks old I think you have already fixed it by now, but I just wanted to say that you are not the only one with this issue :)))
PS: when the display goes black, resetting the video drivers (ctrl + shift + windows key + B) may fix it :))