Thanks for updating the BIOS on the computer. Please boot into BIOS (F2 during startup) and check if the screen dims - if it does, please share a video of it.
For my reference, please click on the message tab next to your avatar– click “New Message” & search for my Dell username (DCFAdmin) & send a private message with the service tag, registered name & email address.
Rebooting the laptop resets the screen brightness. The issue seems to occur randomly, sometimes taking hours. I'm not able to consistently repro it in Windows. I don't know if I would be able to repro it in BIOS, let alone catch it on video.
I'm having the same issue with my Inspiron 15 3567 laptop.
It started after the last Windows 10 update. For no known reason, the screen will suddenly dim (plugged in to AC) and then go back to normal. It's very random. It happens daily though, just no known way to recreate it and no pattern (like specific website etc). I'll be looking at a webpage and it will just dim, stay dim for differing amounts of time but no more than 5 seconds, then go back to normal. I have run the Support Assist and updated the Bios but it still continues. I have restarted the laptop several times, cleared cache and even wiggled the power cord in case that's it. I can't figure out what is causing it.
Viltris
5 Posts
0
December 26th, 2018 23:00
UPDATE: This seems to happen even when my laptop is plugged in and charging.
DELL-Fuzail M
2 Intern
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130 Posts
0
December 27th, 2018 10:00
Thank you for your message here.
Please boot into BIOS and check if the issue persists - if it does, it would be a hardware issue.
Please update BIOS to the latest version 1.18.0 ,1.18.0 from our support site to check if this resolves it - https://dell.to/2V72BtI
Viltris
5 Posts
0
December 31st, 2018 14:00
Updating to BIOS 1.18.0 did not fix this.
DELL-Cares
Moderator
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27.6K Posts
0
January 1st, 2019 10:00
Thanks for updating the BIOS on the computer. Please boot into BIOS (F2 during startup) and check if the screen dims - if it does, please share a video of it.
For my reference, please click on the message tab next to your avatar– click “New Message” & search for my Dell username (DCFAdmin) & send a private message with the service tag, registered name & email address.
What is a Dell Service Tag and how do I locate it?
- Ravi
Viltris
5 Posts
0
January 2nd, 2019 18:00
Rebooting the laptop resets the screen brightness. The issue seems to occur randomly, sometimes taking hours. I'm not able to consistently repro it in Windows. I don't know if I would be able to repro it in BIOS, let alone catch it on video.
Viltris
5 Posts
0
January 10th, 2019 21:00
Any update? This is still an issue.
Toobusy2
4 Posts
0
February 11th, 2019 12:00
I'm having the same issue with my Inspiron 15 3567 laptop.
It started after the last Windows 10 update. For no known reason, the screen will suddenly dim (plugged in to AC) and then go back to normal. It's very random. It happens daily though, just no known way to recreate it and no pattern (like specific website etc). I'll be looking at a webpage and it will just dim, stay dim for differing amounts of time but no more than 5 seconds, then go back to normal. I have run the Support Assist and updated the Bios but it still continues. I have restarted the laptop several times, cleared cache and even wiggled the power cord in case that's it. I can't figure out what is causing it.