Dell Inspiron R15 5520- One RAM slot is not working -beeping

AlphaBravo1 Posts 1 Registration date Friday January 27, 2023 Status Member Last seen January 27, 2023 - Updated on Jan 27, 2023 at 05:38 PM

My Dell Inspiron 15R 5520's upper RAM slot is working fine. But when I put the same RAM stick in the lower RAM slot, it causes beeps, and the laptop doesn't boot up. The RAM stick is working absolutely fine.

I have cleaned the RAM slot and stick and there are no visible damage or bent/broken slot pins.

How to confirm that the slot is faulty or there is some fault at the motherboard?

And how to rectify this problem?