Laptop not recognizing old ram

Hello everyone. First time poster here, needing some advice. Well I had applied new quality thermal paste and cleaned out the vents to my rig presario cq62. After doing everything, it's not recognizing one stick of ram. I switched them to see what will happen and I got the same result. Does that mean one slot is faulty? Does the fact that I got a bios error have anything to do with it. It was cmos 502 error but for some reason after it was shown, it booted without any problems except the time is always wrong which might be because if the error

Hello @happytohelp,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that your notebook is not recognizing the new or old RAM module in one of the memory slots on your notebook, and that your system displayed a CMOS error. Which slot on the system board is affected when you insert a new RAM module, and is it inserted by itself? I would be happy to help you, but first I would encourage you to post your product number for your computer. Below is a is an HP Support document that will demonstrate how to find your computer's product number. In addition, it will also help if you indicate which operating system you are using; and whether your operating system is 32 or 64 bit. The more information you can provide, the better!
How Do I Find My Model Number or Product Number?
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the necessary information, this way I will be able to research this further for you. I look forward to your reply!
Cheers!
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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Message was edited by: old comm guy

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