The laptop periodically extinguishes the backlight of the screen, close it - open it - it flares up again. What about him?

Question

Iron

You start the system (Xubuntu 18) and work from 2 to 10 minutes (although sometimes (rarely) much longer) and the screen backlight goes out. That is, if you shine a flashlight on it, you can see that the image is being drawn.
I close the lid, open the lid - I move the mouse, the password entry appears - I enter it, I work a little more and goes out again.
On the Windows that was in it once there was the same garbage. Or rather, not quite like that, I didn’t check the trick with closing the opening there. It's just that the screen goes blank from time to time.

I remember that there were extinctions in the BIOS. If you leave it on the OS selection screen, it will also die in a minute or two. The same with open bios settings. "Open-close" - helps

The method - "open-close" does not work with 100% reliability sometimes stops.

The laptop is old - eMashines D520 but good enough not to want to write it off - it crawls well in the net.

Answer 1

It looks like a malfunction, contact is lost, etc.
Try to enter BIOS and leave the laptop in this state. Will it go out? Iron problems. To service.
PS I looked in the Internet - the "sick" is more than 10 years old, the backlight is lamp. It seems that this backlight is cut down periodically. They closed the lid - the backlight was de-energized, the lid was opened - it turned on again. It is pointless to carry it to the service - the repair will cost more than the same, but a living laptop.
Or in the trash / on his organs, or use it further with an external monitor.

Answer 2

There are 2 options, either the backlight "sat down" and the backlight controller is cut down due to emergency operation, or the backlight controller itself dies.
If you really really want to, then on aliexpress you can look for a spare lamp or a spare controller, better both at once

Answer 3

It looks like dying capacitors in the backlight circuit of the monitor.

Answer 4

Monitor backlight dims.
Try to solder the contacts in the workshop. But in 70% of cases, "that's all", one day the screen will go out and will no longer come to life.
Laptop is already 12!!!! years, it's time for him.

Answer 5

Sounds like a hall sensor glitch. In Windows, I would remove the action when closing the lid. In rebellion xs where is it)