12-24-2017 02:01 AM
My Yoga 500 ideapad totally loses it when I plug it into power. The CPU slows down imidiately and runs at 100% usage every time I make an action (opens Chrome takes like 30 seconds). In Speccy, I can see, that the CPU runs at a speed of approx. 500 Mhz (Core speed).
If I unplug the laptop, the speed goes up to like 1,9 Ghz when I opens chrome (chrome opens instantly) and CPU usage maxes out at 40% or so. I can now close Chrome, plug in the laptop once again, and if I open chrome now,it maxes out at 500 Mhz speed with 100% CPU usage.
I have just completely reinstalled windows (10, 64 bit) hoping that this would solve the problem. But it haven't
I have downloaded ALL the drivers and software possible from Lenovos own support page for my laptop, I have ran numerous tests from Lenovo, and other thirdparty applications, no one in which finds any problems.
What should I do? I have done everything in my power to try and fix this problem. I have tried every possibly advanced power options, I have even changed the "when plugged in" power options to match the "on battery" ones, but without any change in performance. I cannot figure out, if this is a problem with my power supply? Or the CPU itself? And no tests suggests any problems...
Anyone able to help me out with troubleshooting? (Yes, I have restarted multiple times, I have updated everything in windows update and drivers using Lenovo support page and a third party driver update software (driverbooster from iobit)).
02-01-2018 04:04 AM
Thanks for using the Lenovo forums.
Unfortunately I have not come across this one before, sounds like it could be some sort of power problem, something perhaps not grounded properly.
I`d recommend perhaps trying another charger, it may be able to help.
Also, see if you can run an LSC scan, see if that is able to point to anything at all:
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.(Will work on Win10)
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.
Otherwise, I think the best option would be to send it in for your local Lenovo support line for an investigation, and possibly a repair if need be.
Below is the link to the phone list where you can find these numbers
Hope this helps, let us know how you get on.
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