Memory extensive check failed and CMOS checksum error

[Gaz18]

Kind of a couple of issues but the request was put on for the most recent one.

-Oldest is the fact that I replaced the battery a few months back as the one that came with the laptop was starting to run its course, since then I've had to manually calibrate the battery a good few times as the HP support app has told me it needed calibrating a few times.

-Second issue is that recently on start up, when the laptop charger cable isn't plugged in, my laptop has the black screen and is saying something like the CMOS checksum failed (I read up and saw that this may be a simple case of replacing the CMOS battery but I haven't got around to ordering one yet)

-The most recent issue is that I did a battery check and it came up with the message that my battery is failing and was stuck on 88% and not charging, I then restarted the laptop and ran the test again and it then said it needed calibrating again but was not failing. I thought id try doing this first before I resigned myself to swapping the old battery back in (that I've kept). While running the extensive memory test on loop for the manual calibration it said the extensive memory test had failed with failure ID: "0GEFTH-90LASP-XD7UQK-40J203" and it says underneath memory slot two (a few months ago I expanded the ram and added a stick in the vacant slot, so maybe its come loose ?). 

So does anyone have any advice/ solutions for these problems, any would be appreciated.

[Echo_Lake]

@Gaz18

Thank you for posting on HP Support Community.

Don't worry as I'll be glad to help,

I appreciate your efforts to try and resolve the issue. After reading your post I did decode the failure and found out that the memory module failed.  In order to fix this issue computer needs to repaired. As we have limited support boundaries in the support community as of now. 

I would request you to reach out to our Support and our Support Engineers should be able to check the available service options in order to diagnose the computer physically. 

HP Support can be reached by clicking on the following link:  www.hp.com/contacthp/​​​​​​​
 

Please feel free to contact us here anytime you need any further assistance. Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.