03-19-2017 08:11 PM
I bought my Yoga 13 (type 20175) brand new in 2014. It shipped with Windows 8, 128GB, 4GB, if I recall correctly. I had a license for W8 Pro that I used and there was a free 8.1 upgrade that I completed not long after purchase.
Upgrades over the last (almost) 3 years have been boosting it to 8GB of ram, installing a Samsung SSD 850 EVO (250GB), Windows 10 (Pro), and now a battery.
Sometime in 2015, I started noticing that if I didn't use the laptop and left it off for 2 or 3 days, the battery would completely discharge to 0%. I chalked it up to age, and could still get several hours of moderate use in a day, so it wasn't a priority.
Finally, I bit the bullet and bought a brand new battery and put it in last week.
Nothing changed. I still have the same problem.
In retrospect, it may have coincided with the installation of Windows 10. Below is a further description of the problem and things I have tried.
When shutting down, the battery loses an average of 2.5% per HOUR. (i.e. after 10 hours, it goes from 100% to 75%)
This is consistent whether I use the Windows Start menu, the power button, or a command prompt (shutdown /s /f /t 0) to turn it off. By the way, putting it in hibernate burns at the same rate.
When putting the laptop to sleep, the battery loses only about 0.75% per HOUR (i.e. after 10 hours, it goes from 100% to 92%). This occurs regardless of how I put it to sleep.
1. I have done a complete fresh install of W10. The one hiccup is that it initially installed Win10 Home (I guess due to the embedded key) and I had to change the product key to upgrade it to Pro.
2. I have disabled fast startup.
3. I have gone through device manager to make sure that nothing has a power management setting to wake the computer.
4. I have rolled back the Intel Management Engine driver to 9.5.x, something in the 8.x range, and disabled it altogether with no change.
5. I have disabled dynamic tick.
6. I have disabled hibernation
7. I have attempted to manage power settings through Group Policy Editor.
8. I have checked to make sure that USB ports are not producing power when shut down.
9. BIOS is upgraded to the latest (Version 55, 5/21/2013)
10. I have upgraded all drivers available from Lenovo that are specific to Windows 10.
11. I have done a battery gauge reset.
I've probably done quite a few other things I just can't recall. It is inexplicable that this machine will use less power in SLEEP mode! There has to be something on that is causing such dramatic battery drain in shut down, but I can't find it.
Any solutions, ideas, help?
03-21-2017 03:20 AM
Thanks for using the Lenovo forums.
Try to revery back to the original version of Windows, maybe that`s whats causing the issue.
You can also try to see if you can run an LSC scan, hopefully it will show something.
1. Please click on the following link
2. Under the section ‘Download’ select the relevant Hyperlink dependant on whether your Lenovo is running Windows 7/8/8.1 32 bit or 64 bit.
3. When prompted, select save and browse to a drive and directory in which to save the downloaded files.
4. Navigate to the folder where you saved the installation file, lscsetup_x86_26001.exe.
5. Double-click the installation file icon to start the installation.
6. Follow the onscreen instructions via the installation wizard that will install Lenovo Solution Centre on your system.
7. Once installed you will have a ‘Lenovo Solution Centre’ icon on your desktop please click to open this.
8. Once solution center is opened please select ‘Checkup’ then ‘Hardware Scan’ and ‘Full Scan’
9. This will take up to 20 minutes, see if this can find any errors.
Hope this helps, let us know how you get on.
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03-21-2017 06:46 AM
I'll try the LSC scan and post the results. It may be a few days before I can do the Win8 rollback since I use the laptop daily for work.
03-21-2017 12:04 PM
So I ran the Lenovo Solution Center hardware scan and it says the machine passed with a Final Result Code of W1W9SAAMF-AFF7EG. HOWEVER, it shows "Warning" on the Video Memory Test, Mathematical Operations Test, and Stress Test on the Video Card. The Video Card Result Code is WVC00V000-JM0X3F.
I would imagine that if it says the unit has passed, that the warnings are the result of some trigger that may not necessarily have anything to do with my battery issues. Despite the warnings, the laptop operates normally when in use.
03-22-2017 08:37 AM
I can't find anything online about the Result Code. Is there something that deciphers what they mean? I assume that since it passed overall that it must not have a bearing on my battery drain issue, but I'd still like to solve whatever is creating the warning messages.