Sony VGN-C1Z User Manual

NUser GuidePersonal ComputerVGN-C series

10nNBefore UseMy Club VAIOIn My Club VAIO you can find:Documentation, which gives you:❑ Access to the User Guide. This manual explains the features of

100nNUsing Peripheral DevicesConnecting a PrinterYou can connect a Windows-compatible printer to your computer to print documents.Connecting a Printer

101nNUsing Peripheral DevicesConnecting an i.LINK DeviceNotes on connecting i.LINK devices❑ Your computer is equipped with an i.LINK port, which you c

102nNUsing Peripheral DevicesConnecting a Digital Video CamcorderTo connect a digital video camcorder1 Plug one end of an i.LINK cable (1) (not suppli

103nNUsing Peripheral DevicesConnecting to a Network (LAN)You can connect your computer to 1000BASE-T*/100BASE-TX/10BASE-T-type networks with an Ether

104nNUsing Peripheral Devices!Telephone lines cannot be connected to the network (LAN) connector on your computer.If the network (LAN) connector is co

105nNCustomizing Your VAIO ComputerCustomizing Your VAIO ComputerThis section briefly describes how to change the main settings of your computer. Amon

106nNCustomizing Your VAIO ComputerSetting the PasswordUse one of the BIOS functions to set the password.Once you have set the password, you will have

107nNCustomizing Your VAIO ComputerTo add the power-on password1 Turn on the computer.2 Press the F2 key when the VAIO logo appears.The BIOS setup scr

108nNCustomizing Your VAIO ComputerChanging/Removing the Power-on PasswordTo change or remove the power-on password1 Turn on the computer.2 Press the

109nNCustomizing Your VAIO ComputerSetting Up Your Computer with VAIO Control CenterThe VAIO Control Center utility allows you to consult system infor

11nNBefore UseHelp and Support CenterHelp and Support Center is a comprehensive resource for practical advice, tutorials, and demonstrations to help y

110nNCustomizing Your VAIO ComputerUsing the Power Saving ModesWhen you use a battery pack as the power source for your computer, you can take advanta

111nNCustomizing Your VAIO ComputerUsing Standby ModeStandby mode turns off the LCD screen and places the hard disk and the CPU into a low power consu

112nNCustomizing Your VAIO ComputerIf the computer is not used for 25 minutes, it will enter Standby mode. To avoid this, you can change the Standby m

113nNCustomizing Your VAIO ComputerUsing Hibernate ModeIn Hibernate mode, the state of the system is saved on the hard disk and power is turned off. E

114nNCustomizing Your VAIO Computer✍If you do not use your computer for a long period of time, place the computer into Hibernate mode. This power savi

115nNCustomizing Your VAIO ComputerManaging Power with VAIO Power ManagementPower management helps you set up power schemes for running on AC power or

116nNCustomizing Your VAIO ComputerActivating VAIO Power Management Power SchemesVAIO Power Management provides several predefined power schemes. Each

117nNCustomizing Your VAIO ComputerConfiguring Your ModemBefore you can start using your internal modem (not all modem are built-in), or each time you

118nNCustomizing Your VAIO Computer9 Click Apply/OK. Your modem is configured.✍Before applying new country settings, please make sure your phone cable

119nNUpgrading Your VAIO ComputerUpgrading Your VAIO ComputerYour computer and memory modules use high precision components and electronic connectors

12nNBefore UseErgonomic ConsiderationsYou will be using your computer as a portable device in a variety of environments. Whenever possible, you should

120nNUpgrading Your VAIO ComputerAdding and Removing MemoryIf you want to expand the functionality of your computer, you can increase the memory by in

121nNUpgrading Your VAIO Computer❑ Use the special bag delivered with the memory module or wrap the module in aluminum foil to protect it from electro

122nNUpgrading Your VAIO ComputerRemoving and Installing a Memory ModuleTo change or add a memory module1 Shut down the computer and disconnect all pe

123nNUpgrading Your VAIO Computer6 Remove the memory module:❑ Pull the latches in the direction of the arrows (1).The memory module is released.❑ Make

124nNUpgrading Your VAIO Computer8 Slide the memory module into the memory module slot and push it in until it clicks into place.!Do not touch any oth

125nNUpgrading Your VAIO ComputerViewing the Amount of MemoryTo view the amount of memory1 Turn on the computer.2 Click Start, point to All Programs,

126nNPrecautionsPrecautionsThis section describes safety guidelines and precautions to help you protect your computer from potential damage.❑ On Handl

127nNPrecautionsOn Handling the LCD Screen❑ Do not leave the LCD screen facing the sun. This could damage the LCD screen. Be careful when using your c

128nNPrecautionsOn Using the Power Source❑ See the online Specifications to check the power operation of your model.❑ Do not share the AC outlet with

129nNPrecautionsOn Handling Your Computer❑ Clean the cabinet with a soft cloth, which is dry or lightly moistened with a mild detergent solution. Do n

13nNBefore Use❑ Viewing angle of the computer's display – Use the display's tilting feature to find the best position. You can reduce eye st

130nNPrecautions❑ Use only specified peripheral equipment and interface cables; otherwise, problems may occur.❑ Do not use cut or damaged connection c

131nNPrecautionsOn Handling Floppy Disks❑ Do not open the shutter manually or touch the surface of the floppy disk.❑ Keep floppy disks away from magne

132nNPrecautionsOn Handling Discs❑ Do not touch the surface of the disc.❑ Do not drop or bend the disc.❑ Fingerprints and dust on the surface of a dis

133nNPrecautionsOn Using the Battery Pack❑ Do not leave battery packs in temperatures above 60°C, such as in a car parked in the sun or under direct s

134nNPrecautionsOn Using Headphones❑ Road safety – Do not use headphones while driving, cycling, or operating any motorized vehicle. It may create a t

135nNPrecautionsOn Handling Memory Stick Media❑ Do not use the media in a location subject to static electricity or electrical noise.❑ Do not touch th

136nNPrecautionsOn Handling the Hard DiskThe hard disk has a high storage density and reads or writes data in a short time. However, it can be easily

137nNPrecautionsOn Handling the Memory Card Adapter❑ Do not touch the memory card adapter connector with your finger or metallic objects.❑ Use only th

138nNTroubleshootingTroubleshootingThis section describes how to solve common problems you might encounter when using your computer. Many problems hav

139nNTroubleshootingComputerWhat should I do if my computer does not start?❑ Make sure your computer is securely plugged into a power source and turne

14nNGetting StartedGetting StartedThis section describes how to get started with using your VAIO computer.❑ Locating Controls and Ports (page 15)❑ Abo

140nNTroubleshootingWhat should I do if a BIOS error appears when I turn on my computer?If the message "Press <F1> to resume, <F2> to

141nNTroubleshootingWhat should I do if my computer or software stops responding?❑ It is best to turn off your computer using the Turn Off Computer op

142nNTroubleshootingWhy doesn't my computer enter Standby or Hibernate mode?Your computer may become unstable if the operating mode is changed be

143nNTroubleshootingWhat should I do if a message window, notifying of incompatibility or improper installation of the battery pack, appears and my co

144nNTroubleshootingWhat should I do if my game software does not work or it keeps crashing?❑ Check the web site of the game if there are any patches

145nNTroubleshootingHow can I change the volume of the startup sound?To change the startup sound volume1 Press the F2 key.The BIOS setup screen appear

146nNTroubleshootingSystem SecurityThis section provides information about keeping your computer operating smoothly and protecting against potential t

147nNTroubleshootingHow do I keep my antivirus software updated?You can keep the Norton Internet Security software program current with the latest upd

148nNTroubleshootingBatteryHow do I find the battery charging status? See Charging the Battery Pack (page 26). When is my computer using AC power? Whe

149nNTroubleshootingCan my computer enter Hibernate mode while using battery power? Your computer can enter Hibernate mode while using battery power,

15nNGetting StartedLocating Controls and PortsTake a moment to identify the controls and ports shown on the following pages.

150nNTroubleshootingInternetWhat should I do if my modem does not work?❑ Make sure the telephone cable is securely plugged into the modem port on your

151nNTroubleshootingWhy is my modem connection slow?Your computer is equipped with a V.92/ V.90 compatible modem. Many factors may influence modem con

152nNTroubleshootingNetworkingWhat should I do if my computer cannot connect to a wireless LAN access point?❑ Connection availability is affected by d

153nNTroubleshootingWhy is the data transfer speed slow?❑ The wireless LAN data transfer speed is affected by distance and obstructions between device

154nNTroubleshootingWhat are channels?❑ Wireless LAN communication occurs on divided frequency bands known as channels. Third-party wireless LAN acces

155nNTroubleshootingBluetooth TechnologyWhat should I do if other Bluetooth devices cannot discover my computer?❑ Make sure both devices have the Blue

156nNTroubleshootingWhat should I do if other Bluetooth devices cannot connect to my computer?❑ Make sure the other device is authenticated.❑ Your com

157nNTroubleshootingWhy is my Bluetooth connection slow?❑ The data transfer speed depends on the obstacles and/or the distance between the two devices

158nNTroubleshootingCan I use a device with Bluetooth technology on airplanes?With Bluetooth technology, your computer transmits a radio frequency of

159nNTroubleshootingOptical DiscsWhy does my computer freeze when I try to read a disc?The disc that your computer is trying to read may be dirty or d

16nNGetting StartedFrontA Bluetooth indicator* (page 22)B WLAN (Wireless LAN) indicator (page 22)C Num lock indicator (page 22)D Caps lock indicator (

160nNTroubleshootingWhat should I do if I cannot play a CD or DVD properly on my computer?❑ Make sure the disc was inserted into the optical disc driv

161nNTroubleshooting5 Double-click the optical disc drive device to open the submenu.6 Double-click the listed drive, and select the Properties tab.7

162nNTroubleshootingWhat should I do if I cannot write data to CD media?❑ Do not launch any software application or allow any to launch automatically,

163nNTroubleshootingWhat should I do if I cannot write data to DVD-RAM media using Windows functions?This Q & A entry applies to selected models o

164nNTroubleshootingDisplayWhy did my computer screen go blank?❑ Your computer screen may go blank if the computer has lost power or has entered a pow

165nNTroubleshootingHow do I change the screen resolution on my TV screen?❑ Your TV screen may not show the whole screen image of a video if the scree

166nNTroubleshootingWhat should I do if the LCD brightness of my computer screen changes?The LCD brightness setting, adjusted with the Fn+F5/F6 keys,

167nNTroubleshootingPrintingWhat should I do if I cannot print a document?❑ Make sure your printer is on, and the printer cable is securely connected

168nNTroubleshootingMicrophoneWhat should I do if my microphone does not work?If you are using an external microphone, make sure the microphone is tur

169nNTroubleshootingMouseWhat should I do if my computer does not recognize my mouse?❑ Make sure your mouse is securely plugged into the port.❑ Restar

17nNGetting StartedAWIRELESS switch (page 56)B Power indicator (page 22)C Battery indicator (page 22)D Hard disk drive indicator (page 22)E Optical di

170nNTroubleshootingSpeakersWhat should I do if my speakers do not work?❑ Make sure your speakers are properly connected and the volume is turned up l

171nNTroubleshootingTouch PadWhat should I do if the touch pad does not work?❑ You may have disabled the touch pad without connecting a mouse to your

172nNTroubleshootingKeyboardWhat should I do if the keyboard configuration is wrong?❑ The language layout of your computer's keyboard is labeled

173nNTroubleshootingFloppy DisksWhy doesn't the Safely Remove Hardware icon appear on the taskbar when the drive is connected?Your computer does

174nNTroubleshootingAudio/VideoWhat should I do if I cannot use my DV camcorder?If the message appears to indicate DV equipment seems to be disconnect

175nNTroubleshootingMemory Stick MediaWhat should I do if I cannot open my image files?You may need to reformat your Memory Stick media.Formatting Mem

176nNTroubleshootingPeripheralsWhat should I do if I cannot connect a USB device?❑ If applicable, check the USB device is turned on and using its own

177nNTroubleshootingDocking StationWhy can't I use my TFT/DVI monitor connected to the DVI-D port?The DVI-D port on the docking station is enable

178nNSupport OptionsSupport OptionsThe section contains information on where to go for answers to questions about your computer.Sony Support Informati

179nNSupport Optionse-SupportWhat is e-Support?You have searched our user guides and web site (www.vaio-link.com) but have not found an answer to your

18nNGetting StartedBackA Battery connector (page 24)

180nNSupport OptionsCan I submit my questions at any time?Yes, you can submit your questions 24/7, but please keep in mind that our e-Support Team can

181nNSupport OptionsTrademarksSony, Battery Checker, Click to DVD, DVgate Plus, HotKey Utility, Memory Stick Formatter, Prepare your VAIO, SonicStage,

182nNSupport OptionsThe ExpressCard word mark and logos are owned by the PCMCIA and any use of such marks by Sony Corporation is under license. Other

© 2006 Sony Corporationn

19nNGetting StartedRightA Hi-Speed USB (USB 2.0) ports*1 (page 97)B i.LINK (IEEE 1394) S400 port (page 101)C S VIDEO OUT port (page 89)D Monitor (VGA)

2nNContentsBefore Use ...

20nNGetting StartedLeftA Built-in speakerB Network (Ethernet) port*1 (page 103)C Modem port (page 55)D Microphone jack (page 96)E Headphones jack (pag

21nNGetting StartedBottom A Docking station connector (page 77)B Air vents

22nNGetting StartedAbout the Indicator LightsYour computer is equipped with the following indicator lights. Indicator FunctionsPower 1 Illuminates whe

23nNGetting StartedConnecting a Power SourceYou can use either an AC adapter or a rechargeable battery pack as a power source for your computer.Using

24nNGetting StartedUsing the Battery PackThe battery pack supplied with your computer is not fully charged at the time of purchase.Installing the Batt

25nNGetting Started✍When your computer is directly connected to AC power and has a battery pack installed, it uses power from the AC outlet.!Certain r

26nNGetting StartedCharging the Battery PackThe battery pack supplied with your computer is not fully charged at the time of purchase.To charge the ba

27nNGetting Started✍When the battery pack is running out of power, both the battery and power indicator lights blink.Keep the battery pack in your com

28nNGetting StartedRemoving the Battery Pack!You may lose data if you remove the battery pack while your computer is on and not connected to the AC ad

29nNGetting StartedShutting Down Your Computer SafelyTo avoid losing unsaved data, be sure to shut down your computer properly, as described below.To

3nNUsing Peripheral Devices...

30nNUsing Your VAIO ComputerUsing Your VAIO ComputerThis section describes how to get the most out of using your computer.❑ Using the Keyboard (page 3

31nNUsing Your VAIO ComputerUsing the KeyboardYour keyboard is very similar to a desktop computer keyboard, but has additional keys that perform model

32nNUsing Your VAIO Computer Fn + (F10): zoomChanges the screen resolution to magnify/restore your computer's screen view.✍The default resolut

33nNUsing Your VAIO ComputerUsing the Touch PadYou can point to, select, drag, and scroll objects on the screen using the touch pad.✍You can disable/e

34nNUsing Your VAIO ComputerUsing the Optical Disc DriveYour computer is equipped with an optical disc drive.To insert a disc1 Turn on the computer.2

35nNUsing Your VAIO Computer4 Close the tray by pushing it in gently.!Do not remove the optical disc when your computer is in a power saving mode (Sta

36nNUsing Your VAIO ComputerReading and Writing Optical DiscsYour computer plays and records CDs and DVDs, depending on the model you purchased. Check

37nNUsing Your VAIO ComputerPR: playable and recordableP: playable but not recordable–: not playable nor recordableCD-ROMVideo CDMusic CDCD ExtraCD-R/

38nNUsing Your VAIO Computer!This product is designed to playback discs that conform to the Compact Disc Digital Audio standard specifications (CD Sta

39nNUsing Your VAIO ComputerNotes on writing data to a disc❑ To make data on a disc readable on the optical disc drive, you need to close the session

4nNPrecautions ...

40nNUsing Your VAIO ComputerNotes on playing DVDsTo achieve optimum performance when playing DVDs, you should follow these recommendations.❑ You can p

41nNUsing Your VAIO ComputerPlaying CDsTo play an audio CD1 Insert a disc into the optical disc drive. 2 If nothing appears on the desktop, then click

42nNUsing Your VAIO ComputerCopying Files to CDsTo copy files to a disc!Do not strike or shake your computer while writing data to a disc.1 Insert a b

43nNUsing Your VAIO ComputerPlaying DVDsTo play a DVD1 Close all running software applications.2 Insert a DVD into the optical disc drive.3 If nothing

44nNUsing Your VAIO ComputerUsing the ExpressCard ModuleYour computer is equipped with either a Universal ExpressCard slot* or an ExpressCard™/34 slot

45nNUsing Your VAIO ComputerInserting an ExpressCard Module!Your computer is delivered with a slot protector in the ExpressCard slot. Remove the slot

46nNUsing Your VAIO Computer!Insert the ExpressCard slot protector to protect against debris entering the slot when not using an ExpressCard module. B

47nNUsing Your VAIO ComputerRemoving an ExpressCard ModuleFollow the steps below to remove the ExpressCard module while your computer is on. If it is

48nNUsing Your VAIO ComputerUsing the Memory Stick MediaYour computer supports the Memory Stick media. Memory Stick media is a compact, portable, and

49nNUsing Your VAIO ComputerWrite-protecting a Memory Stick MediaSome versions of Memory Stick media are designed with an erasure prevention switch to

5nNTouch Pad...

50nNUsing Your VAIO ComputerInserting a Memory Stick MediaTo insert a Memory Stick media1 Hold the Memory Stick media with the arrow facing upward and

51nNUsing Your VAIO ComputerTo view the contents of the Memory Stick media1 Click Start and then My Computer to open the My Computer window. 2 Double-

52nNUsing Your VAIO ComputerRemoving a Memory Stick MediaTo remove a Memory Stick media1 Check that the Memory Stick PRO/Duo media indicator is off.2

53nNUsing Your VAIO ComputerUsing Other Memory CardsYour computer is delivered with the memory card adapter for the ExpressCard slot to support the fo

54nNUsing Your VAIO ComputerInserting a Memory CardTo insert a memory card to the memory card adapter1 Insert any one of the memory cards (2) to the m

55nNUsing Your VAIO ComputerUsing the InternetSetting Up a Dial-up Internet ConnectionBefore you can connect to the Internet, you need to connect your

56nNUsing Your VAIO ComputerUsing Wireless LAN (WLAN)Using the Sony Wireless LAN (WLAN), all your digital devices with built-in WLAN functionality com

57nNUsing Your VAIO ComputerWireless LAN devices using the IEEE 802.11a standard and the ones using the IEEE 802.11b or g standard cannot communicate

58nNUsing Your VAIO ComputerCommunicating without an Access Point (Ad-hoc)An ad-hoc network is a network in which a local network is created only by t

59nNUsing Your VAIO ComputerTo communicate without an access point (ad-hoc)1 Turn on the WIRELESS or WIRELESS LAN switch.The WIRELESS LAN indicator li

6nNBefore UseBefore UseCongratulations on your purchase of this Sony VAIO® computer, and welcome to the on-screen User Guide. Sony has combined leadin

60nNUsing Your VAIO Computer12 Enter the network key*2.The network key should be 5 or 13 alphanumeric characters or 10 or 26 hexadecimal*3 characters

61nNUsing Your VAIO ComputerTo disconnect from a computer-to-computer (ad-hoc) network1 Click Start and then Control Panel.2 Click Network and Interne

62nNUsing Your VAIO ComputerCommunicating with an Access Point (Infrastructure)An infrastructure network is a network that extends an existing wired l

63nNUsing Your VAIO ComputerTo connect to a wireless network1 Make sure an access point is set up.See the manual that came with your access point for

64nNUsing Your VAIO ComputerTo disconnect from a wireless networkTurn off the WIRELESS or WIRELESS LAN switch.!Turning off the wireless LAN functional

65nNUsing Your VAIO ComputerUsing the Bluetooth FunctionalityThe Bluetooth functionality is available on selected models only. See the online Specific

66nNUsing Your VAIO ComputerNotes on using the Bluetooth functionality❑ The data transfer rate varies, depending on the following conditions:❑ Obstacl

67nNUsing Your VAIO Computer❑ The 2.4 GHz band, with which Bluetooth devices or wireless LAN devices work, is used by various devices. Bluetooth devic

68nNUsing Your VAIO ComputerBluetooth SecurityThe Bluetooth wireless technology has an authentication function, which allows you to determine with who

69nNUsing Your VAIO ComputerCommunicating with Another Bluetooth DeviceYou can connect your computer to a Bluetooth device such as another computer, a

7nNBefore UseENERGY STARAs an ENERGY STAR Partner, Sony has determined that this product meets the ENERGY STAR guidelines for energy efficiency.The In

70nNUsing Your VAIO ComputerTo communicate with another Bluetooth deviceTo communicate with another Bluetooth device, you need first to set up the Blu

71nNUsing Your VAIO ComputerUsing the Bluetooth HeadsetThe Bluetooth headset may be available as an optional accessory. It will come in handy, along w

72nNUsing Your VAIO ComputerTo disconnect the headset from your computer1 Right-click the Bluetooth icon on the taskbar and select Bluetooth Setting

73nNUsing Peripheral DevicesUsing Peripheral DevicesYou can add functionality to your computer by using the various ports on the computer.❑ Connecting

74nNUsing Peripheral DevicesConnecting a Docking StationAttaching a docking station enables you to connect additional peripherals to your computer, su

75nNUsing Peripheral DevicesLocating Ports on the Docking StationTopA DC IN indicatorIlluminates when the docking station is powered.B Corner guide sy

76nNUsing Peripheral DevicesBack!The docking station can be powered only through the AC adapter supplied with your computer. Do not unplug the AC adap

77nNUsing Peripheral DevicesAttaching Your Computer to the Docking Station!When your computer has no battery pack installed, do not attach the compute

78nNUsing Peripheral Devices4 Slide open the docking station connector cover on the bottom of the computer.5 Align the rear bottom corners of the comp

79nNUsing Peripheral Devices6 Gently push down the computer to fix it into place.7 Lift open the LCD screen lid and turn on the computer.!Use the AC a

8nNBefore UseDocumentationYour documentation includes printed information and user guides to read on your VAIO computer.Guides are provided in PDF for

80nNUsing Peripheral DevicesDisconnecting Your Computer from the Docking Station!To prevent loss of unsaved data, be sure to turn off your computer be

81nNUsing Peripheral DevicesTo disconnect your computer from the docking station1 Press the UNDOCK button (1) and wait until the IN USE indicator (2)

82nNUsing Peripheral Devices2 Lift the computer away from the docking station.3 Close the docking station connector cover on the bottom of the compute

83nNUsing Peripheral DevicesAlternatively, you can disconnect the computer from the docking station as follows:1 Click Start and then Undock Computer.

84nNUsing Peripheral DevicesConnecting External SpeakersYou can enhance the sound quality of your computer by connecting external speakers.To connect

85nNUsing Peripheral DevicesConnecting an External DisplayYou can connect an external display to your computer. For example, you can use the computer

86nNUsing Peripheral DevicesConnecting a Computer DisplayYou can connect a computer display (monitor) either directly to your computer or via the opti

87nNUsing Peripheral DevicesConnecting a Multimedia Computer DisplayYou can connect a multimedia computer display that includes built-in speakers and

88nNUsing Peripheral Devices

89nNUsing Peripheral DevicesConnecting a TVYou can connect a TV to your computer.To connect a TV to your computer1 Plug the power cord of your TV into

9nNBefore UseNon-printed Documentation❑ User Guide (this manual) — Contains features of your computer. It also includes information about the software

90nNUsing Peripheral DevicesConnecting a ProjectorYou can connect a projector (for example, the Sony LCD projector) directly to your computer or via t

91nNUsing Peripheral Devices

92nNUsing Peripheral DevicesSelecting Display ModesYou can select which display to be used as the primary monitor when an external display (desktop mo

93nNUsing Peripheral DevicesModels with the NVIDIA video controller1 Click Start and then Control Panel.2 Click Appearance and Themes.3 Click Display.

94nNUsing Peripheral DevicesUsing the Multiple Monitors FunctionThe Multiple Monitors function allows you to distribute portions of your desktop acros

95nNUsing Peripheral DevicesTo select the Multiple Monitors mode!To find which video controller your model includes, see the online Specifications.Mod

96nNUsing Peripheral DevicesConnecting an External MicrophoneIf you need to use a sound input device (for example, to chat over the Internet) you need

97nNUsing Peripheral DevicesConnecting a Universal Serial Bus (USB) DeviceTo prevent your computer and/or USB devices from damage, observe the followi

98nNUsing Peripheral DevicesConnecting a USB Floppy Disk DriveYou can purchase a USB floppy disk drive and connect it to your computer.To connect a US

99nNUsing Peripheral DevicesDisconnecting a USB floppy disk driveYou can disconnect a USB floppy disk drive when your computer is on or off. Disconnec