bens Posted June 8, 2006 Share Posted June 8, 2006 Refurbished 550EX on a Canon 10D. Have had it about a year, without a lot of use. Was trying it out in Av mode, and it fired normally, perhaps a dozen times. Then switched to high-speed synch by pressing + and - on the speedlite simaltaneously. The 550EX would not fire, and it has not fired since. Not on the camera or off the camera in any test firing (the test lamp is always red, but there is no flash). Have tried it in every mode, switched to fresh batteries, switched lenses. Nothing. The speedlite appears to function properly in every other way. In fact, the camera information for each photograph records as if a flash has fired. Sometimes the speedlite green light even comes on, presumably because I have the exposure correct, after I take a shot although no light is firing. Has the unit failed, or have I inadvertantly done something to cause it not to flash that can be changed? Any and all suggestions greatly appreciated. Thank you. Link to comment Share on other sites More sharing options...
bens Posted June 8, 2006 Author Share Posted June 8, 2006 And if it is broken, is it worth having Canon repair it? Any experiences with them on this kind of repair? Anyone know the cost? Link to comment Share on other sites More sharing options...
picturesque Posted June 8, 2006 Share Posted June 8, 2006 I have a 580EX, but I know there is a custom function that turns the firing off, so check that first. Everything else functions the same but it doesn't fire. Or, you could have put it in TTL through custom function, because in that mode, the flash doesn't fire but focus assist and everything else functions as normal. Link to comment Share on other sites More sharing options...
bens Posted June 9, 2006 Author Share Posted June 9, 2006 Thank you, Nadine. I've tried the custom functions, the TTL was not enabled. Still no flash. Thanks for the idea though. Link to comment Share on other sites More sharing options...
picturesque Posted June 9, 2006 Share Posted June 9, 2006 Sorry...is the LCD panel functioning as normal? Does focus assist function as normal? Did you try it on another camera? Link to comment Share on other sites More sharing options...
bens Posted June 9, 2006 Author Share Posted June 9, 2006 Yes, all those things functioning properly. Does not fire on my old D30 either. Since the test flash doesn't fire, I think its the flash itself. Thanks again though, you are always willing to try and I appreciate that. Link to comment Share on other sites More sharing options...
ken munn Posted June 9, 2006 Share Posted June 9, 2006 "Then switched to high-speed synch by pressing + and - on the speedlite simaltaneously." Just tried the same trick on my 550 and it keeps on flashing, on or off camera. So I guess yours is bust. Sorry. Link to comment Share on other sites More sharing options...
bens Posted June 9, 2006 Author Share Posted June 9, 2006 Thanks for trying Ken. Link to comment Share on other sites More sharing options...
bens Posted June 20, 2006 Author Share Posted June 20, 2006 Follow-up -- Canon was terrific in repairing the unit promptly from its Irvine facility. Came back today, appears to be good in all respects, haven't a chance to shoot with it quite yet, but it is test firing properly. To Canon and back in about 11 days. Link to comment Share on other sites More sharing options...
carlos_m._alanis Posted September 18, 2006 Share Posted September 18, 2006 Hi! I have a similar issue. My 550 was mounted on a stand, firing as a slave with the infrared trigger. after a few shots it just stood there in the dark. it stopped firing at all. I tried on camera (both, an A2 and a 20D), with the IR trigger and the test button. I tried all flash modes and even removing and re-inserting batteries. All with the same result. ... what was the cost to repair yours? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now