There is not a lot of info on those machines.
I can only suggest you open the laptop bottom and see if it has a removable cmos battery.
It is a small battery about the size of a small coin.
You will also need to remove the main battery first.
Leave the cmos battery out for about 10 mins.
Replace the cmos battery
Replace the main battery
Power on.
BEWARE some laptops have a non removable cmos battery.
Different types of cmos batteries. cmos battery - Google Search

 

Resetting the BIOS would be the best thing to do in the situation you are in with your laptop. Just follow the instructions given in the previous posting in this thread and you should be able to get the default BIOS settings back in place.

 

Boa noite, usei uma fonte de alimentação de 12V no meu mecer z140c então a fonte é 5v agora nao liga. Como concertar?

 

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