After Second Attempt - NCR PC4i Service Manual

9. Check the AC slow-blow power fuse, located in the
power supply.
following fuses have been inserted:
Monochrome:
Color:
Videotex:
10. Ensure that the adapter boards edge connectors
are correctly seated in the MPB board connector
slots.
11. Turn the display brightness and the computer
volume control knobs fully clockwise to their
maximum settings.
12. Replace any adapter board removed.
13. Turn on the computer again.

After Second Attempt

1. Turn OFF power and unplug power cord3.
2. Take out all expansion adapter boards for any
features which had been added to the original
basic machine.
Refer to Chapter 6 "Removal/Replacement" for
instructions on removing the cabinet from the
computer and on removing each pertinent adapter
board.
The adapter boards that remain will be:
a. The monochrome or color/graphics display
adapter board.
b. The fixed disk drive controller board, if the
computer has a fixed disk.
3. Disconnect
device which is connected to either the parallel
or serial port connector on the rear of the
computer.
For the available versions the
3 A
6.3 A
4 A
each printer
BASIC TROUBLESHOOTING
or other peripheral
2-7