Windows 7: no ethernet controller, no internet connection

hi, sorry for waiting, i couldnt get that computer till now xD

motherboard is P35-DS3L, LAN is enabled in bios and i have active connection plugged in.

tomorrow i will reinstall windows again and now i'll try to do what you said once again (turn off, part ram and battery, wait 20 minutes)

and btw where is that "Allow the computer to turn off this device to save power" ?

edit1: after 1 hour or more i returned battery and ram, nothing changed, then i uninstalled ethernet, restarted computer, it fount ethernet (as it was before) but could not install driver...

edit2: i reinstalled windows 7, everything same, i see ethernet controller in device manager, i installed the right driver from site
http://218.210.127.131/downloads/dow...&GetDown=false
Win7 32/64 Auto Installation Program (SID:1354639).
and it said it was installed successful, but it didnt, in device manager is stil not installed (?)

edit3: i bought lan pcie card, so the problem is "fixed"

Dear Wasteful
I have the exact same problem as you mention above
I've googling around and try all any tips that lead me
and I have decided that all is the same (maybe they were just a copy-paste blogger)
reformat OS, upgrade BIOS, plug the power, system check, off the RAM, battery I've even tearing apart all my hardware from the casing and still cannot solve the problem.

finally I think about to buy LAN PCIE Card as well. I believe the onboard automatically turn off as I plug the card? (CMIIW)
Could you share what LAN card you have bought? many thanks

I had the exact same thing happen to my D620. I turned it on one day it was lagging like hell so I did a hard reboot. When I turned it back on, everything was fine, but the ethernet port just disappeared from the whole computer. I've tried all sorts of things with drivers and the device manager, but the port has never been recognized since that incident. Just like hanggar and a bunch of other people on here. Done all sorts of bizarre fixes recommended by google. Meddled with BIOS, pulled the ram, I killed the power. The only thing I don't really want to do is reformat the whole computer, especially since nothing tells me that's going to solve the problem. No idea what to do for it. I'd love to see a thread for a proper solution to this issue since clearly we're not alone.

So i fixed this issue on my system... by rolling back a windows update that updated the driver for my PCI upstream switch port under system devices.. just searched trhough all my devices in device manager and found the ones that were dated the time i did the update and rolled them back and this was the one that fixed it

sir i have tried all these option to start my ethernet cable but still when i install the realtek ethernet controller to my pc it is showing that "deep sleep mode is........"
the recent thing is i have got a new modem from the intrnet connection provider after that i cant use ethernet .... is it the modem is fail or anything else coz the ethrnet light is still blinking in modem when i connect it to computer....
what shoud i do....