Do you have the option of trying a different Ethernet switch? I’ve had bad ones that had intermittent connections.
I see you already tried a new cable. Did that go directly from the computer to the switch or is there wall cabling in the path?
From: Jack Epperson [mailto:Jack.Epperson@alphamediausa.com]
Sent: Thursday, February 22, 2018 5:25 AM
Subject: RE: [CRTech] Weird LAN issue!
Do not discount that the NIC (onboard or in a slot) could be bad. They do! Try another NIC.
Alpha Media- Aurora, IL
Matrix Broadcasting- Crystal Lake, IL
WERV, WFXF, WZSR
SBE CBRE CBNT, GROL
"Old engineers don’t die, they dielectric."
From: Willie Barnett [mailto:firstname.lastname@example.org]
Sent: Wednesday, February 21, 2018 2:56 PM
Subject: [CRTech] Weird LAN issue!
To the Braintrust:
I have a computer that apparently only recently started having weird LAN connection issues... it keeps showing "connected/disconnected" in a repeating cycle, as though someone is plugging and unplugging the LAN cable.
Tried in a different port, new cable, etc. No help.
Created a backup, and restored to a new HD, and installed a whole new MoBo, which included a new LAN port.
After all the drivers were in, the computer worked... but the LAN started going on/off again, same as before!! :O Now, this is with a COMPLETELY NEW MOBO, (new LAN port) and even connected to a different switch!
Obviously, it's something in Windows. (XP)
A Google search suggested changing from 1GB speed to 100Mbit. That stopped the "blinking", so that important computer is once again useful...for now.
I hope to find an answer, tho, so I can work on it on Friday, and fix it properly... but now, my workday is done. ;)