Sounds like a very simple problem right? Well, it took me an hour to fix and the solution is so simple but it's never the first thing that comes into mind.
So yesterday I came home and Joey was asking my why Youtube upload keep failing, and upon inspection, the network connection was down. Here are the steps that was taken in sequence.
So yesterday I came home and Joey was asking my why Youtube upload keep failing, and upon inspection, the network connection was down. Here are the steps that was taken in sequence.
- Check LAN connection on router - connection was intact
- Check LAN connection on PC - connection was intact
- Unplug LAN cable from PC and plug into my MacBook - MacBook detected LAN working - therefore PC LAN port fried?
- Plug cable as peer from PC to MacBook - no problem, APIPA assigned and can ping each other (after turning off firewall at Windows 7)
- Both LAN ports on PC and MacBooks seems OK. Router issue? Tried all 4 ports from Linksys WRT54G to PC - no connection - no lights at all and Windows says that Media Disconnected
- Tried all 4 ports from Linksys to MacBook - all ports working!
- Took out my 8 port 10BaseT hub and connect to Linksys - no problem - lights on
- Plug my MacBook into 10BaseT hub - obtained DHCP and able to browse Internet
- Plug PC into 10BaseT hub - lights we on but no DHCP IP
- Restarted DHCP Client service - no help
- Disabled NIC and reenable - no help
- Uninstall NIC driver and reinstall - no help
- Rebooted PC - numerous time - no help
- Changed the NIC card auto-negotiation setting to both 100Mbps and 10Mbps - no help
- YANK the power cord from the PSU, wait for a few seconds to make sure all power is discharged - and turn PC back on. Everything works fine now.
- The house had a power trip that evening,
- It was never an issue before coz I had a UPS
- The UPS died last year
- Somehow the NIC card thinks that the Linksys caused the power trip and therefore actively rejects it - until a complete power cycle (from the mains power, that is) is performed
