We recently had a DPO3014 oscilloscope fall off a table in our lab. As a result of the fall the fan broke off of its supports. In attempting to repair the fan using the Tektronix published repair and troubleshooting guide, the fan was temporarily repositioned but the oscilloscope now no longer turns on. When the power button is pressed, the fan tuns on but the screen never does. Where can I send it for repair.