Toshiba L755D User Manual

User’s Manual

8-17

Troubleshooting

When the display panel and an external monitor 

are set to clone mode and they are turned off by 

the timer, the display panel or the external 

monitor may not display when turned on again.
If this occurs, press FN + F5 to re-set the display 

panel and external monitor to clone mode.

Display error occurs

Check that the cable connecting the external 

monitor to the computer is firmly attached.
If you are still unable to resolve the problem, 

contact your reseller, dealer or service provider.

Communication 

software can’t initialize 

modem

Make sure the computer's internal modem 

settings are correct - please refer to the Phone 

and Modem Options link within the Windows 

Control Panel.

You can hear a dial 

tone but can’t make a 

call

If the call is going through a Private Branch 

Exchange (PBX), take care to ensure that the 

communication application's tone dial detection 

feature is disabled.

You place a call, but a 

connection can’t be 

made

Make sure that the settings are correct within 

your communication application.

After making a call you 

can’t hear a ring 

Ensure that the communication application's tone 

or pule dialling selection feature is set correctly.

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 within your 

communication application.

A CONNECT display is 

quickly replaced by NO 

Ensure that the communication application's 

error control feature is set correctly.