Opening the PR-11 Power Supply





Drill small hole in the cornor of the back cover




Insert a small nail in the hole




Bend the cornor of the back as shown below


Bend back the (4) tabs in the case with cutters to release the back







Slide a knife under the cover



Work the knife down the cover to take it from the case



Remove the back



common fault is broken solder connection or voltage regulator




Did you check the inline fuse?






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