|From what I can see RAM is a likely culprit. Start by removing the RAM and cleaning the edge connectors with a soft pencil eraser. Then pop the sticks in and out a few times to ensure there is no oxide on their sockets. See if that helps.|
If not try one stick at a time in first position to see if you can diagnose a RAM issue. There are also RAM tests available:
You will obviously have to create the disk on another computer, and on yours ensure that the disk drive is first to boot (BIOS setting).
Always pop back and let us know the outcome - thanks