Toshiba Tecra C40-D1412 Users Guide for Portege R30-D and Tecra C40-D/A40-D - Page 141
External monitor
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Problem Annoying sound is heard Procedure In this instance, you might be experiencing feedback from either the internal microphone or an external microphone connected to the computer. Refer to Sound System and Video mode for further information. Volume cannot be adjusted during Windows start up or shut down. If you are still unable to resolve the problem, contact TOSHIBA Support. External monitor Also refer to Operating Basics, and to the documentation supplied with your monitor for further information. Problem Procedure Monitor does not turn on After confirming that the monitor's power switch is on, check the connections to make sure that the power cord/adaptor is firmly connected to the monitor and to a working power outlet. User's Manual 6-14