HP printer (HP OfficeJet 4655) under Ubuntu 16.04 has started printing B/W only. No color. -Prints test page ok, except B/W only.
-Copies in color so ink cartridges and mechanism are OK.
-Reinstalled hplp-3-17-11 (current version of printer controller)
-verified correct print driver was selected during HPLP install.
-Tried printer on another computer and it prints in color OK.
-localhost:631 displays CUPS 2.1.3 page, but admin page and others are NOT FOUND.
Here are the directories of cups and ppd
classes.conf classes.conf.O cups-browsed.conf cupsd.conf cups-files.conf interfaces ppd printers.conf printers.conf.O raw.convs raw.types snmp.conf ssl subscriptions.conf subscriptions.conf.O
K-BEPSON-Stylus-NX330.ppd K-BEPSON-Stylus-NX330.ppd.O OfficeJet_4650_fax.ppd OfficeJet_4650.ppd
The offending printer is the OfficeJet 4650.
The Epson listed is not at my current location and it functioned as expected the last time I tried it (4 months ago)
So what is causing the CUPS 2.3.1 NOT FOUND errors mentioned above???