Manual for C70-A/C70D-A/C70t-A/C70Dt-A

Manual for C70-A/C70D-A/C70t-A/C70Dt-A

Brand: TOSHIBA

Category: Laptop

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 9:23 p.m.

Warranty Information

No specific warranty period is mentioned in the extracted text.

This manual provides comprehensive instructions for operating your TOSHIBA laptop. It covers various aspects including getting started, understanding the computer's components, performing basic operations like using the touch screen and keyboard, managing power options, and utilizing various software utilities. Key sections include:

  • Getting Started: Unpacking, hardware checklist, and initial setup.
  • The Grand Tour: Identification of computer parts and indicators.
  • Operating Basics: Using touch screen, touch pad, keyboard, optical drives, and media players.
  • Utilities and Advanced Usage: Explanation of pre-installed software and special features.
  • Troubleshooting: Guidance on resolving common hardware and software issues.
  • Appendix: Specifications, regulatory information, and legal footnotes.

The manual also details battery management, wireless connectivity, security features, and system recovery options.

Troubleshooting and error codes

Problem Procedure
Computer shuts down automatically. Leave the computer off until it reaches room temperature. If the computer has reached room temperature and it still does not start, or if it starts but shuts down quickly, contact TOSHIBA Support.
AC adaptor doesn’t power the computer Check the connections to make sure that the power cord/adaptor is firmly connected to the computer and a working power outlet.
Check the condition of the cord and terminals. If the cord is frayed or damaged it should be replaced, while if the terminals are soiled, they should be cleaned with a clean cotton cloth.
If the AC adaptor still does not power the computer, you should contact TOSHIBA Support.
Battery doesn’t power the computer The battery may be discharged - connect the AC adaptor to recharge the battery.
Battery doesn’t charge when the AC adaptor is attached. If the battery is completely discharged, it will not begin charging immediately, in these instances you should wait a few minutes before trying again. If the battery still does not charge, you should check that the power outlet the AC adaptor is connected to is supplying power - this can be tested by plugging another appliance into it.
Battery doesn’t power the computer as long as expected If you frequently recharge a partially charged battery, the battery might not charge to its full potential - in these instances you should fully discharge the battery and then attempt to charge it again.
Check the Power saver option under Select a power plan in the Power Options.
The BIOS setting and system date/ time are lost. The charge in the Real Time Clock (RTC) battery has run out - you will need to set the date and time in the BIOS setup application by using the following steps:
  1. In the Settings charm, click Power and then select Restart.
  2. Hold down the F2 key and then release this key one second after the computer is power on - the BIOS setup utility will load.
  3. Set the date in the System Date field.
  4. Set the time in the System Time field.
  5. Press F10 - a confirmation message will be displayed.
  6. Press the ENTER key - the BIOS setup application will end and the computer will restart.
Output to screen is garbled Please refer to your software's documentation to ensure that it is not remapping the keyboard in any way (remapping involves changing or reassigning the function of each key).
If you are still unable to use the keyboard, you should contact TOSHIBA Support.
No display Press the function keys to adjust the display priority, and to make sure it is not set for output to an external monitor.
Markings appear on the computer's display panel. These marks may have come from contact with the keyboard and Touch Pad while the display panel has been closed. You should try to remove the marks by gently wiping the display panel with a clean dry cloth or, if this fails, with a good quality LCD screen cleaner. In this latter instance you should always follow the instructions with the screen cleaner and always ensure you let the display panel dry properly before closing it.
Computer does not boot from Hard Disk Drive Check to see whether there is a disc in the optical disc drive - if so remove it and try to start the computer again.
If this has no effect, check the Boot Priority Options setting within the TOSHIBA System Settings.
Slow performance The files on the Hard Disk Drive may be fragmented - in this instance you should run the disk Defragmentation utility to check the condition of your files and the Hard Disk Drive. Please refer to the operating system's documentation or online Help File for further information on operating and using the Defragmentation utility.
As a last resort you should reformat the Hard Disk Drive and then reload the operating system and all other files and data. If you are still unable to resolve the problem, contact TOSHIBA Support.
You cannot access a CD/DVD/Blu-ray Disc™ in the drive Make sure the drive’s disc tray is securely closed. Press gently until it clicks into place.
Open the disc tray and make sure the disc is properly seated. It should lie flat with the label facing up.
A foreign object in the disc tray could block laser light from reading the disc. Make sure there is no obstruction. Remove any foreign object.
Check whether the disc is dirty. If it is, wipe it with a clean cloth dipped in water or a neutral cleaner.
Memory media card error occurs Remove the memory media card from the computer and then reinsert it in order to ensure it is firmly connected.
If the problem persists, then you should refer to the documentation supplied with your memory media card for further information.
You cannot write to a memory media card Remove the memory media card from the computer and check to ensure that it is not write protected.
You cannot read a file Check to ensure the required file is actually on the memory media card that is inserted into the computer.
If you are still unable to resolve the problem, contact TOSHIBA Support.
The Touch Pad does not work. Check the Device Select settings.
Click Desktop -> Desktop Assist -> Control Panel -> Hardware and Sound -> Mouse.
On-screen pointer does not respond to pointing device operation In this instance the system might be busy - Try moving the mouse again after waiting a short while.
Double-tapping (Touch Pad) does not work In this instance, you should initially try changing the double-click speed setting within the Mouse Control utility.
  1. To access this utility, click Desktop -> Desktop Assist -> Control Panel -> Hardware and Sound -> Mouse.
  2. Within the Mouse Properties window, click the Buttons tab.
  3. Set the double-click speed as required and click OK.
The on-screen pointer moves too fast or too slow In this instance, you should initially try changing the speed setting within the Mouse Control utility.
  1. To access this utility, click Desktop -> Desktop Assist -> Control Panel -> Hardware and Sound -> Mouse.
  2. Within the Mouse Properties window, click the Pointer Options tab.
  3. Set the pointer speed as required and click OK.
The reaction of Touch pad is either too sensitive or not sensitive enough. Adjust the touch Sensitivity.
To access it, click Desktop -> Desktop Assist -> Control Panel -> Hardware and Sound -> Mouse.
If you are still unable to resolve the problem, contact TOSHIBA Support.
On-screen pointer does not respond to mouse operation In this instance the system might be busy - Try moving the mouse again after waiting a short while.
Remove the mouse from the computer and then reconnect it to a free USB port in order to ensure it is firmly attached.
Double-clicking does not work In this instance, you should initially try changing the double-click speed setting within the Mouse Control utility.
  1. To access this utility, click Desktop -> Desktop Assist -> Control Panel -> Hardware and Sound -> Mouse.
  2. Within the Mouse Properties window, click the Buttons tab.
  3. Set the double-click speed as required and click OK.
The on-screen pointer moves too fast or too slow In this instance, you should initially try changing the speed setting within the Mouse Control utility.
  1. To access this utility, click Desktop -> Desktop Assist -> Control Panel -> Hardware and Sound -> Mouse.
  2. Within the Mouse Properties window, click the Pointer Options tab.
  3. Set the pointer speed as required and click OK.
The on-screen pointer moves erratically The elements of the mouse responsible for detecting movement might be dirty - please refer to the documentation supplied with the mouse for instructions on how to clean it.
If you are still unable to resolve the problem, contact TOSHIBA Support.
USB device does not work Remove the USB device from the computer and then reconnect it to a free port in order to ensure it is firmly attached.
Ensure that any required USB device drivers are properly installed - to achieve this you should refer to both the device documentation and the operating system documentation.
I cannot use the Sleep and Charge function. Sleep and Charge function may be disabled. Enable the Sleep and Charge function in the TOSHIBA System Settings.
When there is a current overflow of the external device connected to the compatible port, USB bus power (DC5V) supply may be stopped for safety reasons. When this happens, disconnect an external device if some external devices are connected. After that, turn the power of the computer ON/OFF to restore the function. If this function can not be still used even if only one external device is connected, stop using the external device because its current is over the acceptable value of this computer.
Some external devices may not be able to use the Sleep and Charge function. In this case, please try one or more of the following methods.
  • Turn OFF the computer while external devices are connected.
  • Connect external devices after turning OFF of the computer.
If this function cannot be still used, change the setting to disable the function and stop using this function.
The battery depletes quickly even when I turned OFF the power of the computer. If Sleep and Charge function is enabled, the computer's battery will discharge during hibernation or when the computer is turned off.
Connect the AC adaptor to the computer or disable the Sleep and Charge function.
External devices connected to the compatible ports do not work when connected to a compatible port. Some external devices may not work when connected to a compatible port if the Sleep and Charge function is enabled.
Reconnect the external device after turning the computer ON.
If the external device still does not work, connect device to an USB port that does not have the Sleep and Charge function or change to disable the Sleep and Charge function.
The "USB Wakeup function" does not work. When Sleep and Charge function is enabled, the "USB WakeUp" function does not work for ports that support the Sleep and Charge function.
In that case, use an USB port that does not have the USB Sleep and Charge function or change to disable Sleep and Charge function.
No sound is heard Press the function keys to increase or decrease volume.
Check the software volume settings.
Please check to see if Mute is turned to Off
Check to make sure the headphone connection is secure.
Check within the Windows Device Manager application to ensure the sound device is enabled and that the device is properly working.
Annoying sound is heard In this instance you may be experiencing feedback from either the internal microphone or an external microphone connected to the computer - please 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.
Monitor does not turn on After confirming that the monitor's power switch is on, you should check the connections to make sure that the power cord/adaptor is firmly connected to the monitor and to a working power outlet.
No display Try adjusting the contrast and brightness controls on the external monitor.
Press the function key in order to change the display priority and ensure that it is not set for the internal display only.
Check to see if the external monitor is connected.
When the external monitor is set as the primary display device in extended desktop mode, it will not display when the computer wakes up from Sleep Mode if the external monitor has been disconnected while in Sleep Mode.
To keep this from happening, do not disconnect the external monitor while the computer is in Sleep or Hibernation Mode.
Remember to turn off the computer before disconnecting the external monitor.
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 the function key 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 TOSHIBA Support.
Cannot access LAN Check for a firm cable connection between the LAN jack and the LAN hub.
Wake-up on LAN does not work Make sure the AC adaptor is connected. The Wake-up on LAN function consumes power even when the system is off.
If problems persist, consult your LAN administrator.
Cannot access Wireless LAN Make sure the computer's Wireless communication function is on.
If problems persist, contact your LAN administrator.
Cannot access Bluetooth device Check to ensure the computer's Wireless Communication function is on.
Check to ensure the Bluetooth Manager application is running on the computer and that power to the external Bluetooth device is turned on.
Check to ensure that no optional Bluetooth Adaptor is installed in the computer - the built-in Bluetooth hardware cannot operate simultaneously with another Bluetooth controller.
If you are still unable to resolve the problem, contact TOSHIBA Support.
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