Make sure that the power cables of the computer are firmly plugged in and the power outlets are switched on. Make sure that the monitor is plugged in and switched on too. If you have a laptop, connect the charging cable (in case it has run out of battery). You may also want to check that the battery is correctly fitted in place (check the underside of the laptop) if it is removable.

A component of your computer may be broken or malfunctioning. If this is the case, you will need to get your computer repaired. Common faults include a broken power supply unit, incorrectly-fitted components (such as the memory or RAM) and a faulty motherboard.

If the computer beeps several times when you turn it on and then turns off (or fails to start), it may be indicating that it has detected a problem. These beeps are sometimes referred to as beep codes, and the pattern of beeps is intended to tell you what the problem with the computer is. Different manufacturers use different beep codes, so you will have to consult the manual for your computer’s motherboard, or take your computer in for repairs.

Varmista ensin, että näytön johdot on kiinnitetty oikein ja että näyttö on päällä.

Tämä voi johtua myös laitteistoviasta. Vaikka tuuletin käynnistyy virtapainiketta painamalla, jotkin muut keskeiset osat eivät välttämättä lähde käyntiin. Tässä tapauksessa vie kone huoltoon.