Specifications

Chapter 4 of this guide contains instructions for removing
and replacing the cover of the system unit and for use of the
antistatic wrist strap and handling of memory and other option
modules.
Warnings: Always shut down the worksystem software and turn the
workstation off before connecting or disconnecting a piece of hardware
and before removing the cover from the system unit or reattaching it.
Always use the antistatic wrist strap when handling memory or other
option modules.
Table 9-1. Error Messages on the Monitor
Message Action
?TFL 0 Check the option module in option slot 0 on the system unit.
Be sure the module is inserted tightly in its slot and that anything
that is connected to it is connected correctly.
If you have another option module that you know is good, try it in
that option slot. If the test no longer fails, the problem is in the option
module. If the test continues to fail, the problem is probably in the
system module.
If you don’t have another option module that you know is good, move
that module to another option slot and run the test again. Remember
that 2D graphics accelerator modules can go only in slots 0 or 1 and
that a 3D module cannot be moved to another slot.
If the test no longer fails, the problem is in the system module. If the
test continues to fail, the problem is in either the option module or the
system module.
(continued on next page)
Troubleshooting 9–5