IBM 5531 Operator's Manual page 45

Checking and Replacing Filters
IBM Industrial Color Display Filter
(continued)
4-6
Operator's Guide
7. Remove the bottom covers and check the filters. Replace the filters if necessary.
If you need new filters, see your place of purchase.
8. Replace the bottom covers. Push the cover snaps back into place.
9. Return the display to its normal operating location. Reconnect all cables (refer to Chapter
2, "Cabling the IBM 5531 Industrial Computer," if you need help.)