Clevo M860TU laptop, Change CMOS-battery

Hallo!

A couple of years ago I bought a Clevo M860TU. Recently my clock on the computer is not working well and I then thought of changing the CMOS-battery on the motherboard.

I found on internet a service manual for the computer (see link below) but it does not say anything about how to change the battery. At page 22 and 23 there is pictures of the motherboard. The CMOS-battery is located at the top side of the motherboard (below the keyboard).

How do i get to this battery? Have somebody done this before and could explain the easiest way to change the CMOS-battery? Should I remove the keyboard or do I have to dissemble the whole computer to get to the battery?

Thanks in advance for the help!

http://tim.id.au/laptops/noname/clevo%20m860tu.pdf

 

There isnt specific CMOS battery removal instructions but if you follow the ones to remove the modem that will get you to the battery (reference 2-4). It looks like that one is also the most steps

 

Use section 2-20, removing the modem. It gives you the instructions necessary to get to the battery. The battery itself is a customized assembly and you are better off getting the whole assembly than just the battery itself, but whichever is easier for you. If you can disassemble the battery package carefully enough, you should be fine.

 

same happened to mine but i cant be bothered to change it so just change date every time i turn it on after the beep and its good to go.

 

While going through that many steps to get the top case off is a little time consuming, the batteries are easy to find, at least (they all typically use CR2032 batteries).

 

Hi, my english is not so good, I'm confused about the type of battery I have to buy for my clevo M860TU...

Is there someone that has replaced, with successfull, the cmos battery of clevo m860tu?!?

 

Hey guys,

I've read the thread above, carefully followed the steps 2-20 from the manual, and replaced the CMOS battery with a new CR2032 battery (already attached to a 2-pin cable). When I restarted, the display was black, so I turned it off again to check, if I might have forgotten some connections (which was not the case). After doing exactly the same steps one more time again, the laptop did not even start anymore. I was very careful during the whole handling process and even renewed the cooling paste between the heat sink and the respective heat sources. Has anyone a clue what I might have damaged, or how I can reset the CMOS in a way that the computer starts again?

Thanks for your help!

 

hi
have you tried putting the old dead battery back in again to see if it will boot.
as i said above mine has been dead for about a year now and the only problem i have is i have to set the date every time i boot.

when you say you replaced the cooling paste was this for the cpu or gpu or both. and was it at the same time you changed the battery. if so then it might not be a cmos problem but youve missed something while re installing the fans,heat pipe and cpu/gpu.
also did you use an earthing cable as static from your hands could well have blown something.

first you could try a EC reset.
remove mains and battery and press and hold the power button down for 20 seconds.
then plug the mains cable in and leave the battery out and turn it on.
if that doesnt work repeat the 20 second button push and then try to boot with batter only.

if none of that works then im sorry to say i have no idea what it could be.

 

Hey MrDJ,

thanks for your quick reply! Unfortunately I've cut the cable with the old battery, since I tried to replace basically the battery first. So that's not really an option. You are right, I did not use an earthing cable in the first place, I should have done that. Apart from that I tried to get rid of any remaining electricity by pushing start button for >20s. The cooling paste was replaced both for cpu and gpu, when I opened the laptop the second time (after replacing the CMOS, the laptop started, but the display didn't show anything). I will try to reset the embedded controller later @ home.I hope that helps....

Thanks a lot for your help!

 

Possible ESD damage here, as MrDJ alluded to. Draining the current first is a good practice, but you can still pass a small enough charge to an electrical component from your body and damage it if you're not grounded. Hopefully that's not what happened here, but it seems to be a likely possibility.

 

Double check all connectors and cables. I had similar problems with my M570TU after I had to replace its chassis a few months ago. It's remarkable how this laptop is still working, it outlived it's own chassis ...

 

I would do a complete strip of the machine and run the motherboard on a non conductive surface with minimal devices plugged in and an external monitor.