Epson EQUITY 386/33 PLUS - Manual (Page 50)

5. Reach back underneath the subassembly and disconnect the
two power supply cables (labelled P4 and P5) connected to
the right side of the main system board, as shown below.
Pull each connector straight up. Do not pull only on the
cables.
power supply cable
6. Lift the entire subassembly out of the computer and carefully
place it on your work surface.
3-8 Accessing Internal Components