Optiplex 9030 Ethernet issue

Question

I was having email and download issues so did a reinstall of Win 10 along with drivers.  Have an unusual problem: a) downloads of large files is slow and often fails ; 2) can not send emails with attachments through Gmail though they will go out under my Verizon account.  Emails without attachments send fine;  3) verification of third party apps is slow and often fails with Google.  After a lot of trial and error I decided to unplug the ethernet cable and go wireless - all works fine.  So issue seems to be ethernet related.  Tried another ethernet cable - did not fix the issue.  My laptop works fine so I expect that the issue is with the Optiplex and not the router - either the driver I'm using or the card on the board has gone bad.  Not sure why I can send attachments when attached to ethernet using Verizon but not Gmail. Any thoughts.

bradthetechnut · Answer

Try replacing the CMOS battery if it hasn't been done in the last 5 years. A low battery causes seemingly unrelated bizarre problems.

If not resolved, you're right, onboard Ethernet could be to blame. Other community members might chime in as well.

ieee488 · Answer

Ethernet is usually the most reliable.

I install Windows 10 on lots of used PCs. Even with a basic installation of Windows, the Ethernet just works.

Did you have a recent thunderstorm? I have had a router's Ethernet port go bad. It was the one that was connected to the PC.

sapeluso · Answer

No recent storms.   Started acting up a few weeks ago.  I thought it was Gmail / Google issues. Decided to reinstall Win 10. Things looked like they got worse.  Web pages loaded slow or not at all.  Downloads failed for large files.  Trouble with getting Google to validate third party apps (I have Google set up properly for this).  Email clients would not send email with attachments through Gmail but will send them through Verizon strange). Did a lot of troubleshooting and on a whim disconnected the ethernet cable and went wireless and to my amazement the issues seemed to go away.  Since my laptop works fine (connected and wireless) I ruled out the router.  Changed the ethernet cable and that didn't help.  Only things left are the driver and a bad card. I'm using the recommended driver.  Guess I can try a usb 3 external ethernet adapter and see if that works.  I guess I could have a Win 10 setting wrong.  Would any Bios settings affect this?  Not sure what else it could be._

sapeluso · Answer

changed the battery.  Still has the same issues

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