Computer won't POST after installing 4 RAM sticks

ram slot 3 and 4 not working   Dan rams slot receiver

3 MB Intel® Smart Cache, Intel® HD Graphics 4600 Intel® Core™ i5-4278U not work These technologies do not store any personally identifiable

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 - 4 x DDR4 DIMM Slots - AMD Ryzen series CPUs support DDR4 3200 2933 2667 2400 2133 ECC & non-ECC, un-buffered memory*

slot 918kiss auto RAM SLOT NOT WORKING FULL SOLUTION - 4 x DDR4 DIMM Slots - AMD Ryzen series CPUs support DDR4 3200 2933 2667 2400 2133 ECC & non-ECC, un-buffered memory*