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Author Message   Marcellobotte Tinkerer Username: Marcellobotte Post Number: 3 Registered: 04-2013 Rating: N/A Votes: 0 Posted on Wednesday, April 17, 2013 - 06:56 pm:    Thank you all for the answers. I've seen on youtube that newer strobes (like 580ex) have a little hole under the rubber caps at the sides of the head. Inside of this hole you can put a wire linked to a resistor to discharge the capacitor safely (in the description of the video the autor says it's specifically made for the repair technician to do it) . I tried then to remove the rubber caps on my flash, but I've found nothing similar, so I decided not to take any risk and brought it to an electrical repair shop that maybe can fix it for a low price. Thank you all for the assistance, and at least I can be happy my english is not that bad. :D