The purple dots in the LCD as called "LCD rot": it's not repairable and a good PB100 screen is sort of hard to find. Anyway you know what you are looking for as the purple dots are always visable even when the laptop is turned off.
Originally the screen definately did not have tantalum capacitors at the back of the panel ( see back right side ): there were 8 or 10 small radial electrolyte one's so someone has probably already replaced them.