User manual SONY VAIO VPC-Z213GX

[. . . ] What should I do if my computer does not start?Make sure your computer is securely plugged into a power source and turned on. Make sure the power indicator shows the power is on. Make sure the battery pack is installed properly and charged. [. . . ] If you are using an external display, make sure it is plugged into a power source and turned on. Make sure the brightness and contrast controls are adjusted correctly. See the manual that came with your display for more information. disconnect the AC adapter and remove the battery pack. Reinstall the battery pack, reattach the AC adapter, and then press the power button (slide up the power switch on VGN-UX series models) to turn on your computer. Condensation may cause your computer to malfunction. If this occurs, do not use the computer for at least one hour. On all models except VGN-UX series and VGN-TZ series models, remove any extra memory modules you may have installed since purchase. Check that you are using the supplied Sony AC adapter. For your safety, use only genuine Sony rechargeable battery packs and AC adapters, which are supplied by Sony for your VAIO computer. What should I do if a BIOS error appears when I turn on my computer?Then install the battery pack to the computer again. for details , see the on-screen User Guide. If the symptom persists after performing the above, it means the installed battery pack is not compatible. What should I do if a message window, notifying of incompatibility or improper installation of the battery pack, appears and my computer enters Hibernate mode?This symptom could be due to the battery pack not being installed properly. To resolve this symptom, turn off your computer and remove the battery pack. Then install the battery pack to the computer again. for details , see the on-screen User Guide. If the symptom persists after performing the above, it means the installed battery pack is not compatible. What should I do if Windows does not start, showing a message, when I start my computer?If you enter a wrong power-on password three times consecutively, the Enter Onetime Password or Password Check failed message appears. [. . . ] Press and hold the power button (slide up and hold the power switch on VGN-UX series models) for more than four seconds to check that the power indicator goes off. Wait for 10 or 15 seconds, then restart your computer and enter the correct password. When entering the password, check that the Num lock indicator and Caps lock indicator are off. If any are lit, press the Num Lk key (press and hold the Fn key and press the Num Lk key on VGN-UX series models) or the Caps Lock key to turn off the indicator before entering the password. [. . . ]