OKI C5200n printer problems
Came across a bizarre problem today. Two PC's on a domain yesterday started printing to an OKI C5200n were producing nonsensical outputs (here's the standard Windows Printer Test page it produced). Other PC's on the domain were spooling through the server onto this printer and were printing correctly, as well these two machines. Printing directly from the server was also working correctly.
After reinstalling drivers, connecting directly to the printer via TCP/IP, checking logs and configurations etc and finding nothing I restarted the PC with all "Non-Microsoft" services and all startup items switched off by using msconfig. It then printed out fine!
So given a trail of breadcrumbs I went through switching everything gradually back on, until I narrowed it down to the "Machine Debug Manager" which I separately verified by disabling it in "Control Panel" > "Services" on the other PC I hadn't yet touched and doing a test print - which then worked.
Since the service is just for debugging Visual Studio and scripts - not normally needed in a standard office enviroment - I deemed it safe to switch off and leave off.
Has anyone else come across this sort of problem?