Wireless Networking LBP 6230 on Mac OS 10.14.6

My setup was working perfectly until a week ago.  THe wireless connection dropped.  I deleted printer , reinstalled software, and added printer to system preferences/printer scanner.  Several failures to get printer to connect and then success.  But sort lived as connection was dropped the next day.  The printer works perfectly when connected to computer with USB cable so I believe it is a networking problem.  The other devices that use the network continue to work perfectly.  I need to find out whether this is a failure with some component of the printer for wireless networking.