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Lenovo ThinkPad W540, W541 BIOS

Dear All, sorry but i couldn´t find how to create a new post. I have a problem with a W540 because the original charger died. I have bought two 170 Watts but the system has a security that checks if the charger is the same. The original one is 196 watts, but i have only get 170 watts. So the question is, can i flash a custom bios without the charger wattaje check??? Thanks in advance for your kind, help and response, and if you can mark this question as i new thread please go ahead.

Regards!
 
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