Cleaning The Motherboard - IBM JAGUAR V 386 System Manual

Whenever inserting an add-on card to the
motherboard, make sure that there is no dirt on the
"golden finger" of the add-on card. If not, the contact
between the "golden finger" and the slot may be poor
and thus the add-on card may not work properly. Use a
pencil eraser to clean the "golden finger" if dirt is found.

CLEANING THE MOTHERBOARD

The computer system should be kept clean. Dust
and dirt is harmful to electronic devices. To prevent dust
from accumulating on the mother-board, installing all
mounting plates on the rear of the case.
examine your system, and if necessary, vacuum the
interior of the system with a miniature vacuum.
Regularly