Hello.
My name is John Chol de Mawuer, a South Sudanese who pursued his tertiary education in Kenya.
Although my feedback will reach you at a time when you might have already dump your old Laptop for another one. I think i will have to tell you these simple tricks to help you next time when you experience this same problem or helping your friends/relatives who might be stuck with this problem.....
As i was taught back then in school. there are several problems which cause the screen to experience the blackout.......
JUST TRY THESE SIMPLE STEPS TO SEE IF IT GONNA HELP.
Electrical hitches.
Remove your laptop's battery, unplug the power, hold power the button for 1 to 2 minutes, turn on computer with power plug only, then shutdown, add battery and restart
Magnetic On/Off Switch to detect of Close/Open Lid
Your magnet switch is fubar some how. Open up the speaker cover and see if your lid actuator switch that come in contact with the magnet on your lid cover is stuck or not (find where the magnet is in the back of the front lid cover, trace where the magnet area actually touches the base of the computer and you will find the switch) Workaround, start windows with lid at 30 degree angle
Software
Try Fn + F5 or something like that
For the hardware's perils. I may not be able to truly execute it because i'm not competent in the computer hardware's issues.....
Thank for your question and i hope this elaborated trial gonna help you and the others who might be experiencing the same problem and confused on what to do.
John Chol de Mawuer, Juba-South Sudan