Blank screen on the MCDU 1

TASK 22-82-00-810-828-A
Blank screen on the MCDU 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-82-12-000-001	Removal of the MCDU
AMM 22-82-12-400-002	Installation of the MCDU

3. Fault Confirmation
Subtask 22-82-00-865-064-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AUTO FLT/MCDU/1	11CA1	B01

Subtask 22-82-00-710-103-A

B. Test
On the MCDU 1, make sure that the BRT knob is in the middle position.

4. Fault Isolation
Subtask 22-82-00-810-085-A

A. If the screen of the MCDU 1 is blank:

do a C/B reset (11CA1) of the MCDU 1
if the screen stays blank, replace the MCDU-1 [3CA1] , AMM 22-82-12-000-001 and AMM 22-82-12-400-002.

[Rev.8 from Aug 2018] 2026.04.04 04:25:28 UTC