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FDS 747 CDU screen not turning on

 
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747sim



Joined: 21 Nov 2014
Posts: 27

PostPosted: Sun Aug 05, 2018 4:12 pm    Post subject: FDS 747 CDU screen not turning on Reply with quote

One of my CDU screen suddenly turned off today mid-flight. The CDU buttons still work OK. My other CDU works fine. So I tried swapping it all around but the failed CDU's screen doesn't turn on. Is there any other debugging issues I can do?
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pcos
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Joined: 03 Nov 2003
Posts: 2267

PostPosted: Sun Aug 05, 2018 5:02 pm    Post subject: Reply with quote

Always wise to take a VGA feed from the other CDU and plug that in, knowing it is working means you can point to the CDU for the issue.
Trouble shooting is all about ruling out things and slowly pinpointing where the problem lies.
Peter
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Peter Cos
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747sim



Joined: 21 Nov 2014
Posts: 27

PostPosted: Mon Aug 06, 2018 3:21 am    Post subject: Reply with quote

Hi Peter, yes I swapped everything around from the working CDU but the screen was still not turning on. The button input was working.
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Jon Boe



Joined: 16 Feb 2004
Posts: 396
Location: Centennial, Colorado USA

PostPosted: Mon Aug 06, 2018 7:20 am    Post subject: Reply with quote

Do you get a display when you turn the screen intensity pot from min to max? A long shot but worth trying.
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747sim



Joined: 21 Nov 2014
Posts: 27

PostPosted: Mon Aug 06, 2018 8:10 am    Post subject: Reply with quote

Jon Boe wrote:
Do you get a display when you turn the screen intensity pot from min to max? A long shot but worth trying.


Unfortunately not. That does dim the display in PSX though, which shows the USB buttons are working.
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pcos
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Joined: 03 Nov 2003
Posts: 2267

PostPosted: Mon Aug 06, 2018 8:50 am    Post subject: Reply with quote

Best to email for further discussion.
Peter
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