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Dell 7559 wifi/Ethernet not working?

Joined
Jun 28, 2012
Messages
9
Motherboard
Dell Inspiron 15 7559-Clover
CPU
i7 6700HQ
Graphics
HD530
Mobile Phone
  1. Android
  2. iOS
Hi, I have a Dell 7559 laptop with sierra 10.12.6 working just fine for almost 2 years. Recently, i update the bios to 1.3.0 and the system can't boot.
I don't remember what version ths bios was before. I tried serveral version and flash with version 1.2.9 at the end. Now the system can boot but the wifi and ethernet not working.
the wifi card is bcm94352z

Does anyone know how to enable wifi and ethernet again in sierra?
 

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