Epson LT - 286e - Manual (Page 21)

RTC Test
This test verifies the accuracy of the real time clock by
comparing it to the timer 0 interrupt.
During the test, you see this message:
Testing Real Time Clock....
When the test completes successfully, you see this message:
Real Time Clock test passed.
CMOS Validity Test
This test checks the system’s CMOS RAM.
During the test, you see this message:
Testing CMOS validity....
When the test completes successfully, you see this message:
CMOS validity test passed OK.
16 System Diagnostics