LeeBirdptinstalls Posted March 19, 2012 Posted March 19, 2012 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
FN-GM Posted March 19, 2012 Posted March 19, 2012 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.
LeeBirdptinstalls Posted March 19, 2012 Author Posted March 19, 2012 Basically the teacher is attempting to write on the board but the cursor goes haywire.
FN-GM Posted March 19, 2012 Posted March 19, 2012 Yep thats it usualy static. Try what i said in post 2
ToyHeartsFan Posted March 19, 2012 Posted March 19, 2012 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.
SneakyBeaky Posted March 19, 2012 Posted March 19, 2012 When this has happened on two of my boards a firmware update has fixed it.
chazzy2501 Posted March 19, 2012 Posted March 19, 2012 (edited) 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? Edited March 19, 2012 by chazzy2501
bossman Posted March 19, 2012 Posted March 19, 2012 @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
Sylv3r Posted March 19, 2012 Posted March 19, 2012 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.
LeeBirdptinstalls Posted March 20, 2012 Author Posted March 20, 2012 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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