Kernel Tasks Swamping processor-2012 13" Retina Acquired a 13" Retina liquid damaged - Apple Certified Tech.  Trying to salvage.

Haven't disassembled yet to see the extent of the liquid but it boots and runs.  No liquid spill indicators triggered.  

Battery is recognized but in "Replace" mode and does not charge or function.  Boot time is slow, run time is slow.  

Activity monitor shows that CPU's are "swamped" in the 85% to 90% range at all times with nothing but the O/S installed.  Primary usage is pegged to Kernel Task. 

I am seeing some posts that this could be battery related?  I disconnected the battery yesterday  but there was no change in CPU usage. 

I am also wondering if it is possible that there is a security software that has been activated that is looping causing the CPU's to to load up.  I got this from an Apple employee but I suppose it's possible that it has a dark past.  

Have tried Safe mode, no change.  

Anyone?  

Thanks.

John
I'd suggest running AHT to check the temperature sensors are giving within-range results.

An Apple Certified Technician will also have access to ASD, which should give a more thorough test.