LinuxQuestions.org - Toshiba P755 Laptop lost ethernet connection in Mint 17 & Win Vista (dual boot)

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Toshiba P755 Laptop lost ethernet connection in Mint 17 & Win Vista (dual boot)

Ethernet was working well yesterday in Mint 17 and Win, today there is no connection. Signal is good from router.
Output from "lspci" command reads:

Code:

ken@ken-Satellite-P755 ~ $ lspci

00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)

00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)

00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)

00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)

00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b4)

00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b4)

00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b4)

00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)

00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 04)

00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 04)

00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)

02:00.0 Network controller: Intel Corporation Centrino Wireless-N + WiMAX 6150 (rev 67)

03:00.0 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev 30)

03:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller (rev 30)

03:00.3 System peripheral: JMicron Technology Corp. MS Host Controller (rev 30)

03:00.4 System peripheral: JMicron Technology Corp. xD Host Controller (rev 30)

04:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04)

So wireless is not working from either OS?

Did you make any changes?

Is there a physical switch or F key that could of been accidentally pressed?

I did check the "F8" key on the laptop to make sure WIFI was enabled. In any case, I can't get LAN or WiFi to work. Now I did plug in a Belkin USB Wireless adapter and I got Win to recognize it with manufacture's driver install. But, I cannot get Mint 17 to recognize the Belkin Adapter. Incidentally, the wifi that is integrated into the Toshiba Laptop (Intel 802.11 b/g/n wireless)could be no good, since the screen is cracked pretty good, thus messing up the wifi receiver/hardware. I never could get it to work, I just relied on the Ethernet connection.
I don't know if this makes any difference; but I had just installed the distro. -MoonOS as a third OS. It turned out to be just too buggy on this system, so I took it off and reformatted that EXT4 partition (that is shared on the drive that Mint is installed on. Since then I lost the Ethernet connection.