Backlight issue repair.
Remove stand by removing 3 screws and sliding stand out.
You need to use force to pry a part front and back of the plastic case with some tool.
I used stiff knife between front and back cover plastics and twisted to pry it open little by little.
Take insides a part piece by peace to get hands on the power supply
Power supply has some obvious issues with capacitors so they need to be changed and hope that it will solve the problem.
Use soldering iron on the solder side and pry capacitor gently by hand from side to side to get it out.
Clean soldering pads and insert and solder new capacitors.
Succes!