Information display device displaying screen for identifying causes of troubles, method for displaying information, and program for causing computer to execute the method

An information providing device comprising:

• an input device that accepts an input to the information providing device;
• a display device that displays a screen;
• a control device that controls an operation of the information providing device;
• and
• a storage device that stores each of a plurality of trouble candidates that may occur in the information providing device,
• wherein the plurality of trouble candidates are respectively associated with a plurality of phenomena in the information providing device,
• each of the plurality of phenomena is associated with a cause analysis tree having predetermined hierarchies and including a plurality of causes,
• the control device displays the plurality of trouble candidates on the display device on a basis of the input,
• the control device displays one or more phenomena associated with a selected trouble candidate in a low hierarchy of the cause analysis tree on a basis of selection of any one of the plurality of trouble candidates,
• the control device displays one or more causes associated with the selected phenomenon on the display device on a basis of selection of any one of the one or more phenomena,
• the control device accepts the input until a cause in a bottom hierarchy is displayed on the display device,
• the control device changes a condition of image formation in the information providing device on a basis of a cause in the bottom hierarchy,
• the control device displays a plurality of sample images exemplifying change in the image quality on the display device on a basis of occurrence of change in an image quality in a case where the condition of image formation is changed,
• the input device accepts selection of any one of the plurality of sample images, and
• the control device changes setting of an image formation condition of the information providing device to a condition for forming a selected sample image.