I have a trusty sx40 hs but the pop-up flash stopped working (no flash). I think it can be the flash tube but I cannot find a place where I can purchase a new one. If I maybe have the part number it can make it easier to find. Can anyone help me please. Thank you.
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I'd be inclined to doubt whether it's the flash tube itself unless you can see a visible crack in the glass (most likely around one of the electrodes) - there are probably more ways that the driving electronics could fail.
If you can disassemble the flash head so as to remove the xenon flash tube you can get its precise dimensions and then you may be able to find a replacement on one of the Far Eastern online market places - it's almost certainly a generic part. But probably much easier to replace the complete flash head. There's one on ebay.co.uk currently for £42.50. Or you could put a watch on ebay for a SX40HS for spares or repair with a different fault, which could be cheaper.
But a word of warning - the capacitor (the cylindrical part) may hold a considerable charge for a long time after you switch the camera off, sufficient to give you a nasty shock. Take great care around the flash head until you've had a chance to short out the capacitor terminals with a screwdriver with an insulated handle.
crwdns2934105:0crwdne2934105:0
Thank you for the response. I could not see a crack. I cannot find a workshop in South Africa that can test the unit. Maybe I must just buy a flash for the hot shoe. Any suggestions?
Gas has an atomic weight of 1 trillion. The size of the crack you need a microscope. It can leak through a plastic can that has no crack.
What you can do to fix this problem is in this order
Replace the battery even though the battery got in the camera powers up it may not perform correctly when apply to a load charging that flash circuit to 300 volts. Look at the symptoms of the camera. If it says busy, it won’t let you take a picture with the flash that’s more than likely a problem. However, if the camera does take a picture and no flash happens, the problem with these cameras are when you activate the flash, the mechanical mechanism to put the flash up is so violent. It may have damaged switch to know or tell the camera that it is in the upright erected position. An example would be is if you pressed the flash slider and the slider pops up, put your finger on the flash and push it halfway down and take a picture. You’ll get a picture but no flash because the camera doesn’t know that’s fully affected.
So yes, the second thing to do is to check out the mechanical raffle of the flash and make sure it’s fully erected
And find me the last thing you can do to this camera to get it to work. It’s your due diligence and find another bulb with the same size dimensions are smaller. Maybe even find a junk smash camera where you could take the flash ball out of it is an option if you’re a gambling person. Those bulbs are out there you just gotta find them. And if you replace the flash replace the battery.
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Where are pictures of this 300v charge , how to short it out ? If it was shown it would take care of a lot of models
crwdns2934271:0crwdnd2934271:0 James Eiden crwdne2934271:0
@jameseiden exactly what are you asking for? what pat is this "300v charge" and why do you want to shorten it out? You really need to be more specific.
crwdns2934271:0crwdnd2934271:0 oldturkey03 crwdne2934271:0
Spelled out : when the flash is popped up, there is a capacitor that charges up to 300 V. This must be discharged before you work on it.
After a picture is taken and the flash fires, it says busy on the screen because it is charging the cap for the next fire.
I believe there would be an I believe there would be a great advantage great advantage show how to discharge this cap. Or at least show where it is.
This is a very common problem with all these cameras.
crwdns2934271:0crwdnd2934271:0 James Eiden crwdne2934271:0
There are instructions for making a capacitor discharge tool here:
Constructing a Capacitor Discharge Tool
A 5W capacitor is overkill for a camera flash capacitor since the current will be discharged in a few seconds. Or you could solder four 470Ω 1/2W resistors in series, covering them all with heat shrink sleeving.
The capacitor is easily recognised. It'll be the only cylindrical component with a plastic sleeve in the vicinity of the flash tube, diameter and length in the order of a centimetre.
crwdns2934271:0crwdnd2934271:0 Philip Le Riche crwdne2934271:0