My LED lamp is blinking. Could the power supply be the issue?
Had this blinking with some 12V LED lamps, too. Turned out they didn't like the old 12V switching power supply which obviously was made for halogen bulbs only. Replaced that supply, all okay now.

Electronic background: 12V LED lamps (mostly single-chip ones) have a small switching power supply inside them, too, as the LED wants 350mA constant current at ~4V. So it's one switching supply working on another and that failed. Overcurrent because the LED bulbs draw current only in a spiky fashion.