Unplug ac adapter, main battery and coin battery is best practice. Ensure you are at the same electrical potential as the contents of the laptop. 
So I was doing a cpu gpu repaste and cleaning the fans. After I put everything back together im getting this 2x red 4xblue error code which says the Memory or ram failed. I have a 15 R4 and I havent seen a solution to this problem on this device. How can I solve this error?
15 R4, 2x red 4x blue error