brightness of laptop set to 0 and stuck

[Meziane]

Hello,
I have this Dell Latitude E6420 laptop with i5 version,
I accidentally lowered the brightness of the screen under Windows 7,
Now I do not see anything on the screen and even after rebooting, I can not see the BIOS, I could actually see it and I could try to change the BIOS brightness after 30 minutes of testing, but it did not work no, if I put an external monitor. works after I’m in Windiws but even if I change the brightness nothing happens!
HELP ME PLEASE !!!

[veeg]

Hello

Hopefully some of our members will chime in soon.
@Rustys @Bruce

[Malnutrition]

Sounds more like a hardware issue than a problem that is windows based. But if it is a windows issue, then I believe a system restore is in order.

https://www.howtogeek.com/howto/windows-vista/using-windows-vista-system-restore/

Edit: might as well set your bios to default as well.
https://www.lifewire.com/how-to-clear-cmos-2624545

[Bruce]

what was the method you used to lower the brightness ‘accidentally’ ?

[phillpower2]

, I can not see the BIOS

Do you see the Dell splash screen at all, if not, it is 100% hardware related.

[phillpower2]

Any update for us?

[phillpower2]

Thread closed due to lack of any feedback from the OP.