I have changed batteries in my Speedlite 550EX but when I mount it on my Canon 20D it doesn't turn on. Please help! Problem solved. Corrosion in the battery compartment.
10-22-2009, 08:47 PM
byjamesderuvoDHQ
Re: Speedlite 550EX doesn't turn on
Usually the case and nothing a good pencil eraser won't cure! Glad you figured it out.