Figure 5-9. Port Test Error Table Screen Display - Atari 400 Service Manual

Figure 5-9. PORT Test Error Table Screen Display

5.4 TROUBLESHOOTING GUIDE
The following table provides a list of possible failures at different
points in the power-up sequence and preceeding test procedures. The
table will list the failure, probable cause and the appropriate test
procedure to isolate the problem to a printed circuit board or inte-
grated circuit.
ATARI Personal Computers 5-17