8-12 TroubleshootingModem ProblemsThe modem does not work.z Make sure that the modem driver is correctly installed.z Make sure that the telephone line is properly connected.z Make sure that the COM port in the communication software iscorrectly set.z Turn off power management.PC Card ProblemsThe PC card does not work.z Make sure that the PC card is correctly seated.z If the card requires an IRQ (Interrupt ReQuest), make sure that thereis one available.z The PC card may be attempting to use a COM port in a manner thatconflicts with the COM port being used by another device. Tryrunning the SCU program to change the COM port setting. If yourPC card uses COM1, set COM1 as Disabled. If your PC card usesCOM2, set COM2 as Disabled. If your PC card uses COM4, setCOM4 at Disabled.WARNING: COM3 is reserved for use by the touchscreen, do not disable it. If COM1/2is disabled and COM3/4 is enabled on the SCU Setup (refer to chapter 5), upon bootingsystem would recognize the enabled COM3/4 and designate it as COM1/2.The following table is the default settings:COM Port I/O (Input/Output) Port IRQ (Interrupt ReQuest)COM1 (available) 3F8 IRQ4COM2 (available) 2F8 IRQ3COM3 (reserved fortouchscreen only)3E8 IRQ5COM4 (available) 2E8 IRQ11
