u/Maximum_Building_541

Not very techy here, So 2 days ago I was going to just turn on my laptop (hp 250 g8), I pressed the power button but it didn't display anything, I heard the fans whirring and the charging light indicator beside the charger port was on but ,, nothing got displayed. I kept turning on and off the laptop, tried holding the power button for 30 seconds and turning it on again, laptop finally powered on a few minutes later when the logo appeared. However yesterday I encountered the same problem and this time it really didn't turn on, so earlier I went to a local technician and showed him the laptop, and in his hands the laptop turned on when he tried turning it on, he said he couldn't determine what the problem was (he said it must have been LCD, but I didn't have any glitches or anything, Gemini said it must have been the eDP cable but I'm sick of AI responses) I'm in limbo thinking when's this laptop gonna have the problem again. So how do I know it's a hardware or software problem? Any help guys