Furuno 841 MARK-2 - Manual (Page 40)

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4.5 Self Test
The self test facility checks the keyboard,
ROM and RAM for proper operation. You
may run the test as follows.
1) Press the [MENU] key.
2) Select Self Check. The following display
appears.
Figure 4-1 Self test screen
3) To check the keyboard, press a key. Its
corresponding location on the display
lights in black if the key is operating prop-
erly.
4) To escape the test, press the [MENU] key.
The ROM and RAM are automatically
checked. If NG (No Good) appears to the
right of ROM or RAM indication, contact
your dealer for advice.
[SELF TEST]
KEY BOARD TEST
Press each key. Cor-
responding key on
the screen turns
black.
Prog NO.: 03590951**
ROM: OK
RAM: OK
On Hours: 000019.5H
Tx Hours: 000019.5H