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Screen flickering when the charger is not plugged in

The screen flickers when the charger is not plugged in, but it happens only while using Windows, not in the bios. What could it be?

I’ve had this laptop for 5 years and the screen started to flicker after 1 year of use (I should have tried to fix it before).

I’ve also noticed that the battery is a little bit swollen.

Battery report:

DESIGN CAPACITY: 38.025 mWh

FULL CHARGE CAPACITY: 31.275 mWh

CYCLE COUNT: 153

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Hi,

Does it do this if you start the laptop in safe mode?

It may be a sign that the battery is starting to fail and needs to be replaced.

Create a Win 10 battery report to find out the condition of the battery.

In BIOS the laptop uses a lot less power than when Windows is operating, even if you’re not doing anything in Windows. There’s a lot happening in the background.

Open Task Manager to see what goes on when you’re not doing anything on the desktop.

To view Task manager, right click on the Taskbar to find the link.

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5 Comments:

Thank you, it still happens in safe mode. Also I've created the report but I don't know if the battery is failing, the difference between the two values doesn't seem to be too significant.

DESIGN CAPACITY: 38.025 mWh

FULL CHARGE CAPACITY: 31.275 mWh

CYCLE COUNT: 153

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@Alessandro Vanuzzo ,

OK,

Still happening in safe mode means that it is not a driver problem.

As you say the battery is only down to 82% of full charge capacity so it should be able to handle it.

Try running this free memory test program and check if the problem still occurs.

The idea here is not that you are testing the memory as such. What is happening it that the hardware components are being used to test the RAM i.e. CPU, motherboard, RAM itself, all of which require using more power than just the BIOS menus needs. The program is a standalone program that doesn't require Windows to be loaded or running.

Just trying to see if it is truly Windows related somehow or if it is just a power problem that occurs when more power is required than when just in BIOS as virtually nothing much is happening as far as the hardware is concerned.

You could always try connecting an external monitor to the laptop and check if it happens on it as well as a check in case it is laptop display related or not somehow. Even a TV can be used as an external monitor so long as it has HDMI inputs and you have the cable that can connect the two together.

Did you check Task Manager to see if there was anything that stood out as far as high utilization of resources, you didn't say?

Just trying to eliminate possibilities to try and narrow it done a bit further as to what may be happening.

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@jayeff I've tried to connect an external monitor and the flickering not happens on it, also in the task manager the total usage of CPU is at 2% and the memory is used at 51%, the processes that use a lot of memory are: Antimalware service executable using 73,1 mb and SysMain using 44 mb. The hard drive is used round 5% and only sometimes rise to 50%. I'm trying to run the memory test but the bios refuses to boot the USB drive instead of Windows, I will post the results soon (I hope). Thank you very much for the help!

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@Alessandro Vanuzzo ,

In BIOS there is a setting "legacy USB" (or maybe "CSM", not sure regarding your laptop)

You need to enable it to be able to boot from a USB.

When finished testing remember to restore setting to original value

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What was the resolution to the problem? My issue is the same as described, does not flicker when connected to a monitor. what is the fix for the flickering?

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I would never like to use a swollen battery, you never know how fast it may get worse and you don’t want the battery to explode or damage other components when expanding.


I can’t say that it will solve your problem by changing it, but I would recommend you to do so anyway. But it may as well solve the problem because if a battery is swollen, something is bad with it.

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Alessandro Vanuzzo will be eternally grateful.
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