if you box does not respond or light is blinking, you have a power problem.
you need to replace a single capacitor on power supply board.
you will need :
a Philips #2 screw driver
a soldering gun
basic soldering skills
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Step 1: Remove Cover and Supply Board
you will need to remove all screws (7-8) from the box cover.
Step 2: Idntify Power Supply Board
you will need to replace the capacitor marked with an arrow.
you can use a higher voltage rating caps and up to 100UF higher.
disconnect all cables and remove the 2 screws holding the board.
Step 3: Photo Pdf
print this pdf if need the photos