Intermittent AF540FGZ problem

paul stenquist pnstenquist at
Wed Oct 7 17:59:41 EDT 2009

Sounds like a mount problem. The hot shoe is fiddly. You have to make  
sure its fully in place and clean.
On Oct 7, 2009, at 4:44 PM, Charles Robinson wrote:

> I was trying to take pictures of my grandson a few days ago... and  
> all of my flash shots were turning out black.
> Taking my eye away from the camera, I could see that it was almost  
> doing what it did almost a year ago (which I paid to repair) - the  
> pre-flash was going off when it should... a very dim pre-flash.  And  
> NO flash when the actual exposure was being made.  (Original fault  
> was a dim pre-flash, which would make the camera think that the  
> subject was very dark, which meant that the final flash was usually  
> full-power, regardless).
> The flash worked FINE if I would put it in "A" mode (where,  
> sometimes, I think I would just like it to stick - much more  
> reliable in that position.  I hate P-TTL).
> After some fiddling and changing the batteries out to be sure that  
> wasn't it (it wasn't) it started exposing OK again - but then the  
> zoom mechanism wasn't doing anything.  It would just blink the zoom  
> position on the rear display.
> Switching the zoom position to "manual" and cycling through the zoom  
> positions would have NO effect on the position of the zoom.  It  
> would blink the zoom positions, cycling through all of the zoom  
> levels on the back display, but I never heard the zoom motor going.
> No - it was not the diffuser/reflector pulled out on top - when you  
> do that it sticks in the "manual mode - 13mm" (when it's working).
> Disappointed... I found the receipt from my mid-November-2008 repair  
> and noted the 1-year warranty indicated on that sheet.  I popped the  
> flash into my camera/computer bag and brought it to work, prepared  
> to ship it back to Pentax.
> As I took it out of the bag at work, prepared to give them a  
> detailed write-up of what works and what doesn't.... it works  
> perfectly.
> Now - since I have a month until the repair warranty runs out, I'd  
> really like to have it checked out.  But what do I tell them?  "It  
> works sometimes, but sometimes it does x,y,z"?  Basically I'm  
> wondering what is the most sure-fire way to ensure that the people  
> at Pentax Colorado (or wherever this flash ends up being repaired -  
> sigh) take note of what I tell 'em and really get it sorted out..  
> before I'm on the hook for paying to repair it (again).
> -Charles
> --
> Charles Robinson - charlesr at
> Minneapolis, MN
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