MySQL server PID file could not be found

Hi all Hopefully posted in the right section.... I seem to have killed the database part of my server. All my non database websites are working fine however nothing using SQL is working. To cut a long story short, I installed wordpress this morning and noticed it was a bit slow so I restarted Apache and sql via putty. Apache came back up right away but sql didnt. I tried a few more times and it just wouldn't start. i am presented with the following error message - MySQL server PID file could not be found! [FAILED] Starting MySQL...The server quit without updating PID file [FAILED]b/mysql/myserverid.pid). After trying everything to get it working again I thought I would do an Easy Apache update to same config. That finished but still nothing working with the database. I then tried to upgrade mysql via whm (and then ssh). This didn't yield any joy either - [PHP]root@server [~]# mysql_upgrade Looking for 'mysql' as: mysql Looking for 'mysqlcheck' as: mysqlcheck FATAL ERROR: Upgrade failed [/PHP] Running short on ideas I tried to reinstall cpanel using whm (and ssh) but again this didn't work [PHP][20140916.123156] MySQL55-client is needed by MySQL55-test-5.5.37-2.cp1136.x86_64 [20140916.123156] W Exit Code: 10 [20140916.123156] ***** FATAL: Test install failed: error: Failed dependencies: [20140916.123156] MySQL55-client is needed by MySQL55-test-5.5.37-2.cp1136.x86_64 [20140916.123156] The Administrator will be notified to review this output when this script completes [20140916.123156] ***** FATAL: Error testing if the RPMs will install: Test install failed: error: Failed dependencies: [20140916.123156] MySQL55-client is needed by MySQL55-test-5.5.37-2.cp1136.x86_64 [20140916.123156] see http://go.cpanel.net/rpmcheckfailed for more information [20140916.123156] The Administrator will be notified to review this output when this script completes [20140916.123156] E Detected events which require user notification during updatenow. Will send iContact the log [20140916.123156] Removing staged files and directories for binaries/linux-x86_64, cpanel [20140916.123156] Removing staged files and directories for x3 [20140916.123156] Removing staged files and directories for x3mail => Log closed Tue Sep 16 12:31:56 2014 [20140916.123156] 17% complete [20140916.123156] E Running `/usr/local/cpanel/scripts/updatenow --upcp --log=/var/cpanel/updatelogs/update.1410867106.log --force` failed, exited with code 1 (signal = 0) => Log closed Tue Sep 16 12:31:56 2014 [/PHP] I have data on the server which I need to keep so I would rather not do a full server reformat if i can avoid it. I didn't get chance to backup the website as I have been building it up and wanted to wait til finished. I can get the html files easy enough but as mysql isn't working I am unable to get backups of the due to the database being down. My server is unmanaged so my host will not do anything to help out. I purchased Cpanel for the server via them so no idea who I need to mail for any support. They won't deal with support issues on cpanel because it is a third party application. Any help would be most welcome please. Oh, should add I have tried several combinations of my.cnf inc a blank one and not having one at all. None of these has helped Many thanks Carl