Hello, and thanks for using FixYa.
The powersupply of the display is failing, most likely electrolyte capacitors are wearing out, most likely easily noticable that they are bad, most likely the surface will be bent, bulky etc.
just take a look at this picture to learn how to identify bad capacitors
http://www.auroracomputer.ca/images/bad_cap.jpgyou must replace the bad caps with same voltage and either same UF rating or HIGHER capacitors, DO NOT replace with LOWER VALUES, the cap will blow.