I think I killed my modem, but want to see if anyone agrees.
Rearranged the apartment and used the wrong AC adapter for our modem. Accidentally used the one from an external hard drive, as the tips are exactly the same. The modem wants 12V 750mA, and the drive adapter was 12V 1.5A. I didn't think that would be an issue as the modem seemed to work fine last night after switching back to the correct adapter.
Today I am getting nothing but problems. Internet connection cuts out for long periods of time. Not entirely but super freaking slow. On a 30mbit connection I get maybe 1KB download.
Windows error report said modem problem. Pinging my router gets 1ms with no loss. Pinging the modem gets huge loss, 75%+, going to do a more thorough ping to see how much its dropping.
At the same voltage I figured there wasn't an issue with using the wrong adapter, but I've done power cycling, got to the modems webpage and told it to do a factory reset and still having issues.
Any ideas, or just stuck with buying a new one? And it isn't the cable as I'm watching tv without issue, and pay my bill in full every month early.