Lenovo IdeaPadS145 sleep mode problems

See my laptop recently got back from that last problem with the fan, that got fixed. I could use it normally yesterday, but today: -It took a lot of time to turn on, when I pressed the power key it blinked VERY slowly, after a forcing the shut down and turning it on again after some minutes it started normally. -Now after I left it for a moment, it went to sleep, pressed the power key makes it turn on again but some 2 minutes passed and it restarted.

Any setting that could've caused this or any solution?