MacBook Pro :: Mid-2012 Keyboard Not Working?

Dec 3, 2014

My son's MacBook Pro Mid-2012. Definite signs of liquid spilled on keyboard.  Wouldn't start. 

Plugged in external keyboard and power supply.  Mac came out of safe sleep -- battery discharged.  External keyboard works fine.  Trackpad works fine. 

Computer completely functional, save for most keys dead on internal keyboard. 

Powered down.  Tried to restart but power key unresponsive. 

Installed new keyboard.  Computer powered up.  Keyboard still messed up in same way -- some keys work, most don't, though power key now does work.  External keyboard works fine. 

Reset PRAM and SMC.  No effect. 

Short hardware test showed nothing.  Still awaiting results of long test.  Backed up all data while I was at it. 

My son has a number of shady apps.  Torrents, etc.  Can imbedded viruses cause keyboard flakiness? 

Info:
MacPro, MacBook Pro, MacMinis, MacBooks, iPhones, iPads, AppleTVs, Mac OS X (10.6.3)

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