第一代google nexus 7求救

小第有部第一代 nexus7 ，想将佢"返回原厂设定"但部机要我入PIN码，但我买时都无话有密码比我，有无师兄帮到忙呀唔该~

正常唔洗pin. 你部二手买回来的？

全新呀，佢要我入至比重设……

有无师兄帮到手呀唔该？

Factory swipe.

If your tablet is on, turn it off.
Press & hold the Volume Down button, then press & hold the Power button simultaneously until the tablet turns on. You'll see the word "Start" with an arrow drawn around it.
Press the Volume Down button twice to highlight Recovery mode.
Press the ower button to start Recovery mode. You'll see an image of an Android robot with a red exclamation mark and the words "No command."
While holding down the Power button, press the Volume Up button.
Use the volume buttons to scroll to "wipe data/factory reset," then press the Power button to select it.
Scroll down to "Yes - erase all user data," then press the Power button to select it.

唔该晒各师兄，已搅掂~