A user reports that their laptop screen flickers intermittently. Which of the following should a technician check FIRST?

Correct answer: Check the display cable connection

Option B is correct because intermittent screen flickering on a laptop is most commonly caused by a loose or damaged display cable (the LVDS or eDP cable) that loses contact when the lid is flexed, making it the first and least invasive component to inspect before any other action. Option A is wrong because reinstalling the operating system addresses software issues and would have no effect on a physical connection problem causing flickering. Option C is wrong because replacing the motherboard is an extreme, costly repair that should only be considered after all simpler causes, including the display cable and the display panel itself, have been ruled out. Option D is wrong because RAM modules do not control display output and a faulty RAM stick would manifest as crashes or boot failures, not intermittent screen flickering.