If they do then a reinstall is looking to be the likely solution. This will boot you to the recovery disk, see if the pointer and keyboard work there. If you don't see one listed as Recovery then restart one more time and hold command-R. Key (s) feel 'sticky' or do not respond in a consistent manner.

It should show a row of icons showing what you can boot from. One way to test is to power on and hold the option key. Hopefully it's just the sequence not fixing the issue because then it sounds like a software issue (possible reinstall of the operating system). Padarsey New Laptop Replacement Keyboard with Backlight Backlit for MacBook Pro 13-inch A1278 2008-2015 Year with 80Pce Keyboard Screws. Some models have the trackpad, keyboard and power button going directly to the logic board while some have the keyboard loop through the trackpad (if I remember correctly, it's basically opposite of how the MacBook Air would be internally). Padarsey New Replacement US Layout Backlit Keyboard Compatible for MacBook Pro 15' A1398 2013 2014 2015 Retina W/Screws(Please Confirm Your Your Keyboard Layout is US Layout). If it is a hardware issue the extent depends on what year Retina and what size it is. The distinction is important as you may have a hardware issue. Am I correct in reading that command-option-P-R no longer fixes the issue or the sequence itself no longer restarts the computer?

Macbook pro 2015 keyboard