Can't print wirelessly at home from HP Desktop, to HP OfficeJet Pro 6978. Problems started after upgrading to new Verizon FIOS router, with 2G and 5G networks. It took a while to get the printer working, but I got it working. But now after a week or so, it won't print, although today I printed several diagnostic pages from my PC. When printing from Notepad, it just says "Error Printing". Both the PC and the printer are on the same 2G network.
I just noticed that the Diagnostic pages kind of doesn't go through the printer software. I say that because in my printer queue, there's a document with status "Error - Printing", but even with that the Printer Diagnostics page slipped on by and printed without actually going to the printer queue.
But I can print from a MacBook Pro, no issues, even though in my Printer queue there's still a document in error.