So I had this monitor (Sony SDM-S73) just sitting somewhere not being used so over summer I decided to pop it into my computer for a secondary display over summer, it worked flawlessly, even when I got a new PC it still did the job perfectly. But on October 1st while using my computer the secondary screen stared to do a kind of flicker, at first I thought it was my computer or the connection was loose. I unplugged it and it still flickered, after a while it got back to normal. on November 1st it started happening again and this time it didn't fix itself. now all it does is give me a while screen with a few vertical lines of colours, and when it's on for about 10 seconds it starts to change to green then purple then black. Any way of fixing this? Any help would be appreciated.