7753 hydraulic fluid high temperature warning/ boss display issues

[gumby1]

I had the shutdown symbol and hydraulic fluid temp come on. What causes this to happen? My Boss display has been working intermittently. Sometimes the hourmeter, engine oil and engine coolant bars on the display do not register unless I turn the ignition key back and forth then the bars will register and then the hydraulic fluid warning appears. Could this be a bad display causing all these issues ?Any ideas? Thanks