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am having macbook air suddenly working/ responding slow,fan is running at high speed . disk utility ->verify disk permission shows Warning: SUID file “System/Library/ CoreServices/RemoteManagement/ ARDAgent.app/Contents/MacOS/ARDAg ent” has been modified and will not be repaired. In activity monitor system usin 85% when make AHT it shows an error 4SNS/1/ C0000008:THSP–124 by google it this is a temperature sensor problem what to do if i want to replace a logic board or a temperature sensor. if it so what may be the approximate cost of repairing it MacBook Air, iOS 7.0.5, intel i5 processor 4gb ram
THSP is thunderbolt proximity sensor. I have no clue where this is on your board because you gave no information. 11", 13", who knows? I am going to guess 2012 13.3" 820-3209 board. Check Q5520, and R5540, and R5541. Most likely a tin whisker between 1 and 2 of Q5520, or blown resistor R5540 or R5541. Check there.
