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De computer heeft een speciaal geheugen voor de datum, de tijd en de instellingen voor ingebouwde
voorzieningen, zoals de configuratie van de parallelle aansluiting. Dankzij een knoopcelbatterij blijft deze
informatie ook bewaard nadat u de computer hebt uitgezet.
Meestal vereist de knoopcelbatterij geen onderhoud en hoeft u deze ook niet op te laden. Een
knoopcelbatterij gaat echter niet voor altijd mee. Als de knoopcelbatterij het begeeft, gaan de datum- en
tijdgegevens verloren. Er verschijnt dan een foutmelding wanneer u de computer aanzet.
Vervangingsprocedure
1. Verwijder de kap van de computer. Zie 'Computerkap' op pagina 42.
2. Verwijder de knoopcelbatterij.
3. Installeer de knoopcelbatterij.
4. Installeer alle verwijderde onderdelen opnieuw. Sluit vervolgens het netsnoer en alle losgekoppelde
kabels opnieuw op de computer aan.
5. Stel in het UEFI BIOS-menu de systeemdatum en -tijd opnieuw in.
62 M70t en M80t Gebruikershandleiding
68


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