Epson Apex 20020 - Manual (Page 198)

The first prompt you see is:
The data on the highest physical cylinder
may be destroyed by this check.
Enter Y to start this check.
Enter N to return to the menu.
Press Y and then
Enter
to continue with the test.
Error Codes and Messages
This table lists all the error codes and messages that may appear
during diagnostics checks.
Error code
Message
System board
101
102
103
104
105
105
106
107
108
108
109
110
111
112
113
114
115
80286 CPU ERROR
27256 ROM CHECKSUM ERROR
8254 TIMER COUNTER REGISTER ERROR
8254 TIMER COUNTER ERROR
8237 DMA CONTROLLER REGISTER ERROR
8237 DMA REFRESH ERROR
612 DMA PAGE REGISTER ERROR
8042 TIMEOUT ERROR
8042 SELF DIAGNOSTIC ERROR
8042 WRITE COMMAND ERROR
8259 INTERRUPT CONTROLLER ERROR
146818 CMOS SHUTDOWN BYTE ERROR
146818 CMOS BATTERY ERROR
146818 CMOS CHECKSUM ERROR
80286 INSTRUCTION ERROR
80286 PROTECT MODE ERROR 1
80286 PROTECT MODE ERROR 2
Memory
201 MEMORY/PARITY ERROR