Why does the laptop display stop turning on after turning it off?

Question

laptops

Good afternoon. I was working on an HP Pavilion dv6 laptop and decided to close it at one point. I saw that the indicators were on, so he didn’t go to sleep, I open the lid - a black screen with the cooler running and the indicators flashing. Yesterday I managed to start it by creating a recovery flash drive. Today, this trick did not work at first. I pulled out and inserted the RAM and inserted the USB flash drive - it worked. I decided to update the BIOS - I seem to have updated it, but the display after that also remained black even with a flash drive. Once again I pulled out and inserted the memory - it did not help. I do not know what to do. Tell me, please, if suddenly someone came across.
UPD1: now I poked the memory again - it worked. I noticed that when I insert the wire from the charger into the laptop, if the indicator lights up there, the display turns on, and if it does not light up, it does not turn on. And yet, when I start the laptop, if the sound indicator turns white, the display turns on, and if it remains red, it does not turn on.

Answer 1

You most likely have a floating fault. Either a break in the LVDS cable (which connects the motherboard and the LCD screen of the laptop), or a crack in the soldering of the chipsets, or the multicontroller of the motherboard fails. In any of these cases, I do not recommend solving the problem at home - take it to a service center.

Answer 2

the model of the laptop, at least, was written, otherwise all the regular telepaths are on vacation.