Fans running hard after repair of LCD

had the LCD screen repaired on my iMac (early 2009) last week.
now the fans are running much harder than they have before
I have performed the SMC reset, as per the troubleshooting guide, but it's had no effect.
please advise
respectfully,
Patrick in Dallas

Try an SMC Reset (SMC controls functions like fans.)
-Shut down the computer.
-Unplug the computer's power cord. (After shutting down, leave the computer unplugged for an hour or more)
-Press and hold the power button for 5 seconds.
-Release the power button.
-Attach the computers power cable.
-Press the power button to turn on the computer.

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