Toshiba u300 Manuale Utente

9-14

User’s Manual

Troubleshooting

Modem

No display

Try adjusting the contrast and brightness controls 

on the external monitor. 

Press hot keys Fn + F5 to change the display 

priority and make sure it is not set for the internal 

display. 

Display error occurs 

Check that the cable connecting the external 

monitor to the computer is attached firmly. 
If problems persist, contact your dealer. 

Communication 

software can’t initialize 

modem 

Make sure the computer's internal modem 

settings are correct. Refer to Phone and Modem 

Properties in the Control Panel. 

You can hear a dial tone 

but can’t make a call 

If the call is going through a PBX machine, make 

sure the communication application’s tone dial 

detection feature is disabled. 
You can also use the ATX command. 

You place a call, but a 

connection can’t be 

made 

Make sure the settings are correct in your 

communications application. 

After making a call you 

can’t hear a ring 

Make sure the tone or pulse selection in your 

communications application is set correctly. 
You can also use the ATD command. 

Communication is cut 

off unexpectedly 

The computer will automatically cut off 

communication when connection with the carrier 

is not successful for a set time interval. Try 

lengthening this time interval. 

A CONNECT display is 

quickly replaced by NO 

CARRIER 

Check the error control setting in your 

communications application. 
You can also use the AT\N command.