A904 Lockup Converter Won't Unlock

Usually a converter that won’t unlock is caused by the hydraulic applied ring that presses the clutch disc inside is jammed.
Never seen one that was caused by an unwanted hydraulic application.
Thanks man, can you expand on this I'm brand new to these transmissions? Are we talking about the clutch inside the converter and if so is there anything to do other then throw in a new converter?

Thanks,
Jim