linderman

the CPU popping out while the lock lever is still in the hold down position is a very common mistake, very seldom does it result in permanent damage.

I would be more concerned with removing any remaining thermal agent from the socket of the motherboard, as the thermal grease could act as an insulator and stop those begins effected from doign their job?

get a magnifying glass and inspect closely, you will need to remove the motherboard from the case to perform the clean-up properly.

You may need to swab some goof-off (paint & adhesive remover found at hardware stores) onto the cpu socket with a Q-tip to disolve the thermal grease, then dry VERY well away any residual solvent with a hair dryer. Another good removal fluid is toluene, or xylene (found at paint stores) you will need a solvent that air dries completely, be very careful these are very flammable but work well!

prior to reinstalling, apply new thermal grease as soon in link above