HP ProBook 4525s P540 Laptop Screen 15.6 LED BOTTOM LEFT WXGA HD 1366x768

so this is a HP probook 45 25s and it was given to me because the display stopped working well after like 700 a tenth to turn on and off no that's just I'm just being sarcastic or whatever takes about 20 or 30 tries huh but after a while the display will start working so something what's the motherboard or the display Carter I don't know and it's not a loose cable cuz I've already taken the whole run off and looked and everything's literally attached I've even taken this little flap off so I don't know what it is but it's on but nothing's happening nothing on the screen you see nothing not a damn thing and sometimes if you turn it off then unplug the damn thing and then turn on display will work but not all the time yeah see I still got nothing nada zip so it's a really messed up um mm-hmm computer I have a gun line in and brought me to YouTube and other computers of this near same mod