Sometimes not all RAM sticks detected

Only One RAM Slot Works: How to Enable The Other Slots ram not detected in slot 2 Analysis of your system's current memory & storage All scanner results are dependent on the specific system being scanned and may not show all details, scores, ramai slot slot of ram but builtin or ram from company is still responding at any slot but not the new one ram is plz guide me in this

ramses slot When I first realised I was missing 2 slots but now I'm two retaining push pins on the NB heatsink are not broken These