Epson LT - 286e - Manual (Page 126)

12.
Slide the handle back into place.
Installing a Math Coprocessor
You can also install a math coprocessor in your LT-286e. If your
software supports a math coprocessor, it processes mathematical
calculations much faster than without the coprocessor.
You can easily install the math coprocessor in your LT-286e.
However, to do so, you need to access the motherboard which
contains sensitive circuitry. If you have any doubts about the
installation procedure, ask your Epson dealer for assistance or
contact a Customer Care Center.
To install the math coprocessor, follow these steps:
1. Turn off the computer.
2. To remove the hard disk, press the PUSH button to release
the hard disk and lift it straight up.
Installing Options B-13