My FSC Xa 3530 laptop has the fan at full speed. To use the embedded controller the register 0x93 controls the fan power (bit 2^4 is off, bit 2^2 is on). The register 0x94 controls the speed 0xFF is fan stop and 0x01 is fastest speed. Feel free to write me an e-mail.

Usage:
"O" = fan on
"X" = fan off
"A" = fan software control
"D" = fan user/hardware control

Link: http://bit.ly/o6otCt