Many thanks Gizmo.
Can you believe that there was no storage space left (admittedly it's probably 15+ years old...) because a single log file (error log I believe) grew to over 600GB?
Due to the server running out of disk space the database itself was miraculously intact, but the "/includes/config.inc.php" file you mentioned somehow got zeroed out and was blank. Crazy...
MySQL check shows no errors and I also did a restart of the MySQL server just in case. But the missing file (or rather blanked-out file) was keeping everything from running and uploading this file seems to have fixed everything.
P.S. Really need to look at my options of changing server hosts and what to do with the forum software moving forward...
