Toshiba Satellite L675D-S7104 User Guide - Page 178

178 If Something Goes Wrong Sound system problems Sound system problems No sound is coming from the computer's speakers. Adjust the volume control. Try pressing Fn + Esc to see if volume mute is disabled. Check that the volume control on the computer is turned up. If you are using external headphones or speakers, check that they are securely connected to your computer. The computer emits a loud, high-pitched noise. This is feedback between the microphone and the speakers. It occurs in any sound system when input from a microphone is fed to the speakers and the speaker volume is too loud. Adjust the volume control. Modem problems (Available on certain models.) This section lists common modem problems. The modem will not receive or transmit properly. Make sure the cable from the modem to the telephone line is firmly connected to the computer's modem port and the telephone line jack. Check the communications parameters (baud rate, parity, data length and stop bits) specified in the communications program. It should be set up to transmit at 300, 1200, 2400, 4800, 9600, 14400, 28800, 33600 bps (bits per second) or higher. The modem is on, set up properly but still does not transmit or receive data. Make sure the line has a dial tone. Connect a telephone handset to the line to check this. The other system may be busy or off line. Try making a test transmission to someone else. For more information regarding your system's V.92 modem, visit the Toshiba Web site at pcsupport.toshiba.com.