INT 15 - Compaq SLT/286 or Portable 386 - SET LCD(Liquid Crystal Display)/PLASMA TIMEOUT
	AX = 4001h
	CL = timeout in minutes, 00h to disable
Return: AL = status
	    00h timeout modified
	    01h timeout cannot be modified
	    40h timeout cannot be modified
	CL = timeout in minutes, 00h if disabled
SeeAlso: AX=4000h,AX=4601h