Ja bych se spis obecne ridil doporucenim vyrobce.

Treba Lenovo bod 8-11 - http://support.lenovo.com/en_US/research/hints-or- tips/detail.page?&LegacyDocID=MIGR-52235

Jinak pro tuto desku staci precist manual:

Q: How do I clear the CMOS values?
A: For motherboards that have a CMOS_SW button, press this button to clear the CMOS values (before doing this, please turn off the computer and unplug the power cord). For motherboards that have a clearing CMOS jumper, refer to the instructions on the CLR_CMOS jumper in Chapter 1 to short the jumper to clear the CMOS values. If your board doesn't have this jumper, refer to the instructions on the motherboard battery in Chapter 1. You can temporarily remove the battery from the battery holder to stop supplying power to the CMOS, which will clear the CMOS values after about one minute.