Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
That issue could be one of several issues, it could be a faulty processor, or a faulty Ram chip.
lets try this. Unplug the computer from power and then remove all ram chips. Now insert just one and try to start.
If you still get the error, remove that ram chip and set it aside.. then install the next and try to boot.
If at any point you do not get the error message. Then you know its a good ram chip. Hopefully, only one of t he chips have failed.
Let me know the results of this test when you can. Thank you,