Opening up the Backtrack is not recommended; they're not serviceable units. You may want to get in touch with our Canadian Distributor to see what options are available to you.
SF Marketing (Canadian Line 6 Distributor/Service)
325 Boul. Bouchard
Thanks for the reply. Only one thing, what do you mean when you said that this unit is "not servicable" - Does that mean that even my Canadian distributor of service center could not repair such units? If that's the case, these units are good as disposable/garbage when they get old or damaged then? I think my warranty cannot be applied anymore as this unit was damaged through falling and not damaged when it was bought months ago.