canon 90d

Discussion in 'Technical Troubleshooting' started by kevin davies, Nov 20, 2023.

  1. kevin davies

    kevin davies Well-Known Member

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    working perfectly yesterday wont switch on today replaced battery taken off lens and removed sd card still no go any help welcome
     

  2. johnsey

    johnsey Site Moderator Staff Member Site Supporter

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    did you take a voltage reading on the battery to confim it is charged?
    Secondly when you shut the battery door did it flash red momentarily?

    Chances are you have at least some juice in the battery even it it is failing,

    If the camera acts completely dead it indicates the door on the battery is open, the card/lens shouldn't really be an issue.
    Battery door has a pin that pushes in on a switch to tell the camera the battery door is shut, its a failsafe for the camera to not turn on, its the first thing i would look at to see if something is not right.
    upload_2023-11-20_13-4-37.png
     
  3. kevin davies

    kevin davies Well-Known Member

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    i tried a spare batt, will check the other stuff i am leaving it overnight with batt out lens off and card out will report back thanks
     
  4. johnsey

    johnsey Site Moderator Staff Member Site Supporter

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    Please dont worry about the card and lens stuff, in fact you should always have lens on, it acts as a dust magnet with no lens and your sensor is probably covered in dust specks now. In fact you can power on with no lens specifically to trip the mirror in lock up and clean the sensor. Camera will operate with no card as well. The reason i asked if you checked voltage in the battery is because i have seen failing batteries show green on the charger.

    This is surely a power issue, either the battery is being read as flat dead, or it is not registering the door as shut, this applies to the battery door and the card door, both have a failsafe on providing power to the motherboard.

    NO amount of fussing with other items like the lens or leaving for a period of time will change or fix the problem.
     
  5. kevin davies

    kevin davies Well-Known Member

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    o.k thanks
     
  6. kevin davies

    kevin davies Well-Known Member

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    still no go looks like a visit to canon is in order
     
  7. Caladina

    Caladina Well-Known Member

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    keep us informed on the outcome of the canon report Kevin, best of luck here
     
  8. kevin davies

    kevin davies Well-Known Member

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    spoke to canon tech its going to them will update thanks
     
  9. kevin davies

    kevin davies Well-Known Member

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    Canon have quoted £455 to replace pcb the s/h value is around £600 so i think its a write off
     
  10. Caladina

    Caladina Well-Known Member

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    mpb has 90d's at £750, aliexpress has pcb for £150 but you'd need to put it in yourself

    you sticking with a 90D or time for a change?

    i guess i got price on my side running M50's, cheap enough to replace these days, but i still have two + gf's at the moment
     
  11. kevin davies

    kevin davies Well-Known Member

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    i was hoping to upgrade to r6 but on balance of costs i will get the camera repaired and change it later on. its pay 445 or 749 for a s/h 90d thanks for looking
     
  12. kevin davies

    kevin davies Well-Known Member

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    quote broken down pcb £121 labour 3hrs £83 per hour plus vat
     
  13. Caladina

    Caladina Well-Known Member

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    whats your preference between crop or full frame?
     
  14. kevin davies

    kevin davies Well-Known Member

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    full frame
     
  15. Caladina

    Caladina Well-Known Member

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    didn't you try the R6 a while back?
     
  16. kevin davies

    kevin davies Well-Known Member

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    no rp very slow autofocus
     
  17. johnsey

    johnsey Site Moderator Staff Member Site Supporter

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    You thinking a 6dII or something a bit nicer?
     
  18. kevin davies

    kevin davies Well-Known Member

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    funds wont allow just had to have a new d/g window so i will get the 90d repared and keep it a while
     
  19. kevin davies

    kevin davies Well-Known Member

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    Camera back from canon at last all good but they are a bit of a faff to deal with new pcb and check over
     
  20. Caladina

    Caladina Well-Known Member

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