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Promethean Direct Support Thread, Spiking promethean board in Direct Support; I have a board that is at least 6 years old and is severely spiking. Ive tried a new PSU, ...
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    Spiking promethean board

    I have a board that is at least 6 years old and is severely spiking. Ive tried a new PSU, the drivers are up to date, so barring environmental interference Im going down the route of knackered board. Is it worth replacing the electronics box on the back of the board or will the school have to bite the bullet and replace.

    All suggestions are welcome

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    FN-GM's Avatar
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    How do you mean spiking? Do you mean when you draw a stright line it goes all over the show? If so that is usally caused by static. Unplug the board for an hour and plug it back in and see if it works. If so that will be the issue.

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    Basically the teacher is attempting to write on the board but the cursor goes haywire.

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    FN-GM's Avatar
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    Yep thats it usualy static. Try what i said in post 2

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    Disconnecting a board powering it down, reconnecting it and powering it back up sometimes clears it - I've never waited an hour.

    If its on a usb / serial extension try it without - extensions are a common cause of the problem.

    Re flashing the firmware can also help NOTE: if it goes wrong you will need a new controller.

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    SneakyBeaky's Avatar
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    When this has happened on two of my boards a firmware update has fixed it.

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    excessive water can make them unpredictable! (overly keen cleaner) (dehumidify)

    also nice to have an antistatic foam cleaner around to, I use Amberclens.

    edit: also have you tried a different pointer?
    Last edited by chazzy2501; 19th March 2012 at 11:09 AM.

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    @LeeBirdptinstalls:

    All our Promethean boards are over 6 years old and we used to suffer from spiking on one or 2 of them, one thing we did find is that if you placed ferrite rings which clip on to the power cables at either end this eradicates the static and so stops the spiking.

    Something similar to this below:

    Clip On EMI RFI Noise Ferrite Core Filter for 9mm Cable | eBay

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    When we've seen this in the past either a firmware upgrade or try and move the mains power cable as far away from the board as possible - we had a couple of installs where the transformer was actually behind the board which caused spiking.

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    Thanks all for the input. Ive tried everything suggested but......FAIL!!! The board will have to be retired forthwith......
    I will keep all your suggestions in mind for any future problems

    Thanks again

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