HP E700 manual Solving Infrared Problems

Table 2-13

Solving Infrared Problems

Problem	Possible Cause	Solution
Cannot communicate with	The appropriate software is	Install the appropriate software
another computer.	not running on both	on the second device, start the
	computers.	second device, and start the
		program on both computers.
	The other computer does not	Communication between infrared
	have an IrDA-compliant	devices must use the same
	infrared port. Your Compaq	communications protocol. Check
	computer uses the IrDA	the manufacturer’s instructions for
	communications protocol.	connecting with infrared devices
		or try connecting with a device
		you know to be IrDA-compliant.
Cannot communicate with	The pathway between the	Remove the obstruction, align
another computer (cont.)	infrared ports is obstructed,	the infrared ports to within 30
	one port is more than 30	degrees, and position computers
	degrees (plus or minus 15	within 1.5 feet (about 0.5 meter)
	degrees off the center line)	of each other.
	from the other, or the ports
	are more than one meter
	apart.
	There is an interrupt request	Check for IRQ conflicts in the
	(IRQ) conflict.	Device Manager If two devices
		have the same IRQ address,
		reassign one of the devices.
	There is a baud rate conflict.	Select the same baud rate for
		both computers.
	There is a conflict with the #	Select the same # bits setting for
	bits.	both computers.
	There is a stop byte conflict.	Select the same stop byte for
		both computers.
	There is a parity conflict.	Select the same parity setting for
		both computers.
Cannot transmit data.	Direct sunlight, fluorescent	Remove the interfering light
	light, or flashing incandescent	source(s).
	light is close to the infrared
	connections.
	There is interference from	Keep remote control units such
	other wireless devices.	as wireless headphones and
		other audio devices away from
		the infrared connections.
	There is a physical	Do not place objects that will
	obstruction in the way.	interfere with a line-of-sight data
		transmission between the two
		units.
	One of the units was moved	Do not move either unit during
	during data transmission.	data transmission.
	The orientation of the units is	Adjust the devices so that they
	wrong.	point directly at each other.
	The distance between the	Verify that devices are not more
	units is too great.	than 1.5 feet (0.5 meter) apart.
		Continued

2-18Troubleshooting