Canon Vixia HF R400 camcorder - black screen LCD...

F

Fred

Guest
This camera has one of those rotating displays so you can see it from the
front of the camera. The display was working fine, then just died. No
light at all. I tried the flashlight test to see if it was just the
backlight, but there\'s nothing visible. However, the camera seems to boot
up, and if I connect an HDMI cable, I get video. So apparently the camera
is still working ok except for the LCD display.

I found a couple disassembly videos on Youtube, and thought I would take it
apart to see if perhaps a ribbon cable has come loose, or if the switch
that tells the camera that the display door is open isn\'t working. But
before undertaking that, I wanted to see if anyone here has a suggestion
for a simpler solution. I guess the problem could also be in the pivot
connections, but if that\'s the case there\'s nothing I could fix there.
 
On Friday, February 3, 2023 at 12:42:42 AM UTC-5, Fred wrote:
This camera has one of those rotating displays so you can see it from the
front of the camera. The display was working fine, then just died. No
light at all. I tried the flashlight test to see if it was just the
backlight, but there\'s nothing visible. However, the camera seems to boot
up, and if I connect an HDMI cable, I get video. So apparently the camera
is still working ok except for the LCD display.

I found a couple disassembly videos on Youtube, and thought I would take it
apart to see if perhaps a ribbon cable has come loose, or if the switch
that tells the camera that the display door is open isn\'t working. But
before undertaking that, I wanted to see if anyone here has a suggestion
for a simpler solution. I guess the problem could also be in the pivot
connections, but if that\'s the case there\'s nothing I could fix there.
You have identified the two most common failures for these units. The ribbon cable is the more likely.
Being a Canon, you are not likely to find a replacement cable.

Dan
 
abrsvc says...

You have identified the two most common failures for
these units. The ribbon cable is the more likely. Being
a Canon, you are not likely to find a replacement cable.

Thanks. Yesh, I\'m hoping it\'s just that the ribbon cable
has come loose. Well, it\'s an old camera, so I may need to
get a new one. But I think it\'s worth the effort to try to
fix it. I don\'t think it would make sense to send it to
Canon for repair, but I\'ll check with them if I have no
luck.
 
Fred says...
abrsvc says...

You have identified the two most common failures for
these units. The ribbon cable is the more likely. Being
a Canon, you are not likely to find a replacement cable.

Thanks. Yesh, I\'m hoping it\'s just that the ribbon cable
has come loose. Well, it\'s an old camera, so I may need to
get a new one. But I think it\'s worth the effort to try to
fix it. I don\'t think it would make sense to send it to
Canon for repair, but I\'ll check with them if I have no
luck.

I was able to disassemble the camera, reseat the ribbon cable,
confirm that the switch is working, and reassemble everything.
But nothing has changed, The LCD is still dead. So it may be
some problem on the main board. I would have no way to fix that,
even assuming I could identify the exact problem. So I\'ll
probably look for a used replacement for the camcorder.
 
On Sunday, February 5, 2023 at 4:31:13 PM UTC-5, Fred wrote:
Fred says...
abrsvc says...

You have identified the two most common failures for
these units. The ribbon cable is the more likely. Being
a Canon, you are not likely to find a replacement cable.

Thanks. Yesh, I\'m hoping it\'s just that the ribbon cable
has come loose. Well, it\'s an old camera, so I may need to
get a new one. But I think it\'s worth the effort to try to
fix it. I don\'t think it would make sense to send it to
Canon for repair, but I\'ll check with them if I have no
luck.
I was able to disassemble the camera, reseat the ribbon cable,
confirm that the switch is working, and reassemble everything.
But nothing has changed, The LCD is still dead. So it may be
some problem on the main board. I would have no way to fix that,
even assuming I could identify the exact problem. So I\'ll
probably look for a used replacement for the camcorder.

Look at the ribbon cable carefully with magnification. The problems with these is not that the cable gets loose but that there are small cracks in the cable itself.
It is possible that there is a problem with the board as well. Look for small SMD caps that may have leaked in the area. These too can cause problems of various types in cameras of that age.

Dan
 

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