我的华硕 K53S 笔记本电脑刚刚修好（更换了直流电源插孔），但我的无线功能无法使用。
Wifi 信号极弱或根本没有，我无法成功连接，即使其他设备连接并且信号良好。
运行sudo lshw -C network我得到：
*-network
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 01
serial: e0:b9:a5:27:e5:9b
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.4.0-72-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 memory:de200000-de20ffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 06
serial: bc:ae:c5:5f:62:dc
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168e-1.fw ip=192.168.0.163 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
resources: irq:25 ioport:a000(size=256) memory:d2104000-d2104fff memory:d2100000-d2103fff
我安装的驱动程序是：NVIDIA 二进制驱动程序 - 版本 375.39，来自 nvidia-375（专有，已测试）
在范围内运行sudo iwlist scan两个强 wifi 信号时，我经常会收到“无扫描结果”的信息，但是当我收到响应时，以下是示例：
wlp3s0 Scan completed :
Cell 01 - Address: 06:18:D6:E7:7D:F6
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=21/70 Signal level=-89 dBm
Encryption key:on
ESSID:"WIMToffice"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000003111f0453d
Extra: Last beacon: 944ms ago
IE: Unknown: 000A57494D546F6666696365
IE: Unknown: 010882848B968C129824
IE: Unknown: 030101
IE: Unknown: 050400010020
IE: Unknown: 2A0100
IE: Unknown: 3204B048606C
IE: Unknown: 2D1AAC011BFFFF000000000000000000000100000000000000000000
IE: Unknown: 3D1601000D00000000000000000000000000000000000000
IE: Unknown: 7F080000000000000040
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD1300156D00010100010212E581060418D6E67DF6
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Cell 02 - Address: 06:18:D6:E7:7D:E1
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=18/70 Signal level=-92 dBm
Encryption key:on
ESSID:"WIMToffice"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000058a17bd180
Extra: Last beacon: 644ms ago
IE: Unknown: 000A57494D546F6666696365
IE: Unknown: 010882848B968C129824
IE: Unknown: 030106
IE: Unknown: 050400010000
IE: Unknown: 2A0100
IE: Unknown: 3204B048606C
IE: Unknown: 2D1AAC011BFFFF000000000000000000000100000000000000000000
IE: Unknown: 3D1606000D00000000000000000000000000000000000000
IE: Unknown: 7F080000000000000040
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD1300156D00010100010212E581060418D6E67DE1
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
我也尝试过从实时 CD 启动 Ubuntu 16.04，得到了完全相同的行为。
这是否证明硬件有问题？请提供更多信息以供我分享。
答案1
很可能是技术人员在修理完你的笔记本电脑后没有连接你的 WiFi 天线拆卸程序（见步骤3）。
您只需打开它并将 2 根电线连接到卡上，大约需要 5 分钟的工作时间（第 4 页获得清晰的图片）