Hello, 

Apart from the fact that I had too many problems with my L502X laptop, right now my problem is:

When I press power button on the device, battery icon blinks white twice, then system boots up. But normally there should be light on Power button and other 3 shortcut buttons, but they keep dark even though laptop works.

Inside of the laptop was opened last week by tech guy from Dell, but as far as I remember, it was fine then.

So what could be the reason of my problem?

Edit: There is no error message or something else related with my battery, and windows says that battery is fully charged when it's plugged in which is pretty normal. I tried diagnostics but there wasn't any error messages.