‎Aurora R4, Dimm slots 3 and 4 not working

3rd + 4th RAM slots not working ram slot 3 and 4 not working Well, I'm out of ideas If BIOS is showing the RAM as being in Slots DDR3_1 & DDR3_2 then logically there must be a communication error between ramai slot Also try only one stick of RAM at a time in the first slot that the motherboard manual says to use

ramses book slot Clean all slots with IPA Cleaner or some sort of air blower or if not available then using a soft brush but very gently Then test 2 RAMs in