I have an Asus laptop I turned it on and I left the black screen following the YouTube tutorials I disassemble it I did what they told me and I got it turned on worked fine one day the next day I did not boot I did the same thing but I can not get the screen boot up to see if anyone can help me

Hello! What exactly did you do? ... According to the tutorials ?? At times the black screen is only due to dirty RAM or exhausted battery, try replacing the battery and cleaning contacts of the memory. RAM. (Wipe it with a soft cloth moist with alcohol). I wait for answers. Regards!