Dell Latitude D820 Notebook "monitor screen twitch" Questions

...screen will just like twitch to the side. i restart and it is fine. i recently put in a new hard drive so i dont know if thats it or what. Take it to a service shop and ask them to open the unit and ...

...screen, then resetting itself. this occurs until the computer is turned completely off, repeatedly glowing white and resetting, twitching, and beginning the annoying cycle again every few seconds. I ...

second or two when you first turn the laptop on then it's the motherboard that is faulty. Careful with the monitor to motherboard plug as I damaged mine and the screen is now a permanent shade of blue