Desktop 97 Display Question

[James Linder]

I have a 97 that does not display negative signs for either the mantissa or the exponent but shows them when printing. I do not think any segments of the display are faulty. Can anyone tell me what components are responsible for telling the display to light up the negative signs? I assume the components that are responsible for this will need to be replaced. I will probably start with the two display driver chips unless anyone offers an alternative solution. Thanks