topic Re: 600EXii-RT Stopped Flashing in Speedlite Flashes

600EXii-RT Stopped Flashing

Dakota59 — Wed, 19 Oct 2022 12:17:18 GMT

I have a 600EXii-RT problem that I can't figure out. I changed the batteries and now the unit powers on normally, but won't flash, even with the test button. I had been using it for a few hours prior to the battery change and it worked perfectly. No settings on the unit or my camera (5DM4) were changed during the battery swap. I did try replacing the batteries again (they are new and fresh) but to no avail. There are no error messages active on the flash or camera, and the ready light stays red. The flash unit is a few years old, but has less that 500 flashes on it, very seldom used. Any ideas would be greatly appreciated.

Re: 600EXii-RT Stopped Flashing

deebatman316 — Wed, 19 Oct 2022 21:07:19 GMT

Hi Dakota59 does the pilot light turn on when the speedlite is turned on. What kind of batteries are you using rechargeable or Alkaline batteries. I also own the 600EX II-RT and found the flash doesn't like rechargeable batteries due to the lower voltage. Rechargeable AA batteries only put out 1.1 or 1.2 volts while Alkaline batteries put out 1.6 volts.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT & 600EX II-RT

Re: 600EXii-RT Stopped Flashing

Dakota59 — Wed, 19 Oct 2022 21:57:53 GMT

Thanks for responding deebatman316. I am using alkaline batteries, all new and fresh. And if by pilot light you mean the flash ready light, yes, it is on. It doesn't go green at start up though like it used to, just stays solid red. All other functions work and the display looks like it should be flashing. I am very confused.

Re: 600EXii-RT Stopped Flashing

deebatman316 — Wed, 19 Oct 2022 22:08:08 GMT

Are you able to test the speedlite on a different camera body. Do other functions of speedlite work ie the AF Assist Beam.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT & 600EX II-RT

Re: 600EXii-RT Stopped Flashing

Dakota59 — Wed, 19 Oct 2022 22:22:12 GMT

I don't have another camera body to work wit. What's concerning is I should at least be able to fire a test flash off camera and it won't even do that.

Ron

Re: 600EXii-RT Stopped Flashing

deebatman316 — Wed, 19 Oct 2022 22:26:47 GMT

Will the speedlite fire the modeling flash if the depth of field preview is pressed.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT & 600EX II-RT

Re: 600EXii-RT Stopped Flashing

Dakota59 — Thu, 20 Oct 2022 14:54:48 GMT

It won't flash when I press the DOF button either, and it is enabled.

Re: 600EXii-RT Stopped Flashing

deebatman316 — Thu, 20 Oct 2022 15:57:36 GMT

Do you have another speedlite to test on that camera.

-Demetrius

40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM

430EX III-RT & 600EX II-RT

Re: 600EXii-RT Stopped Flashing

Waddizzle — Thu, 20 Oct 2022 16:14:24 GMT

What camera body are you using?

Does the flash function properly when it is not on the camera body?

Re: 600EXii-RT Stopped Flashing

Dakota59 — Thu, 20 Oct 2022 19:16:21 GMT

I have a 5D Mark IV.

Re: 600EXii-RT Stopped Flashing

Dakota59 — Thu, 20 Oct 2022 19:18:05 GMT

No, the flash will not trigger on or off the camera. Everything else works perfect. Even the green proper exposure light works.

Re: 600EXii-RT Stopped Flashing

Waddizzle — Thu, 20 Oct 2022 20:08:07 GMT

@Dakota59 wrote:
No, the flash will not trigger on or off the camera. Everything else works perfect. Even the green proper exposure light works.

Assuming that there are no issues associated with the batteries, then it sounds like your Speedlite needs service. It could be as simple as a flash tube.