Why USB ports are not working

Question

Dell Inspiron 15-3521

Inspiron 15-3521 配有可选触摸屏功能，并配备 15.6 英寸显示屏。这款笔记本电脑还拥有哑光表面，以及带有数字小键盘的键盘。

声誉积分: 49

2

1

更多选项

the USB is not working I tried all the Dell diagnostic and it is failed.

I tried to rest and still not working.

BIOS is good.

I need to get it repaired but dont know which chip is responsible as both usb ports are not working

这是一个好问题吗？

是否

得分 4

Buddhika Mahesh @buddhikamahesh 声誉积分: 15.3千 13 40 16 · Answer 1 · 2016-03-28T20:47:25-07:00

最有帮助的答案

声誉积分: 15.3千

13

40

16

更多选项

Most common case is the burn fuses of the USB port.

A) Check the fuses – if available

B) You can check the power rails and it should be 5V – if you get >4.0V check the main PMU (Power management unit)

C) 3rd Gen Intel core CPU works with PCH (Platform Controller Hub), the PCH is the responsible chip for USB functioning

这个答案有帮助吗？

是否

得分 1