Upstream issues on a NETGEAR C3700

Tech came out a few weeks ago & replaced loose external connectors. We had service to was up to spec for a few days, but is getting more erratic. DSLReports gives good DL speeds, but UL speeds have been spotty. Uplink light also keeps blinking

After spending the morning trying to work from home, I chk'ed the signal etc, rebooted & chk'ed again (ouch)

the top one is after the modem reboot.

 

Time for new hardware here or does Comcast need another visit?