Blackmagic Forum

Hi all,

Hope everybody's in good health!

Trying to be brief:

Yesterday I've cleaned the spider webs of my old BPPCC since I was invited to film a bunch of scientists who are developing pulmonary ventilators to fight medical shortages on this Corona outbreak.

Yesterday everything was ok and I had image on my Alphatron EVF. Just to try everything, I've connected my EFF to my Tilta V-Vount plate and tried the HDMI feed with the internal camera battery!

Today, in the production place, I went to connect both camera and EVF to the Tilta plate and I had no HDMI signal.

After filming this morning and once at home, I've tried several HDMI cables with no avail until I connect everything to my GH4 and see that everything's working like it should.

There isn't many menu related settings on the first BPPCC to deal with and I've tried them all, so what can be wrong here?

Any help will be appreciated.
Thanks

Seems you burn your HDMI due ground loop connection combined with connecting power/HDMI cables and turning on devises in wrong order This is a very old and very odd problem discussed in many threads. Some most current researches described here viewtopic.php?f=2&t=107642

In ground looped connection you should never connect positive (+) DC power cable pin until you connect negative (-) pin.
Is not so easy to do in real life until you have dedicated switch on positive wire of DC cable, or specially designed DC connector which 100% always connects (-) pin before (+) pin.

I've been powering my HDMI monitor on my BMPCC4K rig with NP-F battery just because I have read enough these cases where people's HDMI port has burned out. It would be nice to power everything from my V-lock battery as I am anyway using it with the camera, but the risk is too high.

I believe this same applies if I use a wireless HDMI transmitter? I mean it doesn't matter if it is a monitor or some transmitter unit. Risk is always there when I plug HDMI cable on an external device that is taking power from the same source as the camera is, right?

As I use sometimes my Hollyland wireless transmitter to send an image for the director's monitor. I like to power it from the same V-lock source as the camera. And I share the image from the transmitters loop-out port to my SmallHD camera external monitor (which I power with an NP-F).

Dmitry Shijan wrote:Seems you burn your HDMI due ground loop connection combined with connecting power/HDMI cables and turning on devises in wrong order This is a very old and very odd problem discussed in many threads. Some most current researches described here viewtopic.php?f=2&t=107642

In ground looped connection you should never connect positive (+) DC power cable pin until you connect negative (-) pin.
Is not so easy to do in real life until you have dedicated switch on positive wire of DC cable, or specially designed DC connector which 100% always connects (-) pin before (+) pin.

Damn! Thanks for the feedback. So I suppose that repairing it is out of the question for what I can read on some posts about this, right?

Alex Valente wrote:

Dmitry Shijan wrote:Seems you burn your HDMI due ground loop connection combined with connecting power/HDMI cables and turning on devises in wrong order This is a very old and very odd problem discussed in many threads. Some most current researches described here viewtopic.php?f=2&t=107642

In ground looped connection you should never connect positive (+) DC power cable pin until you connect negative (-) pin.
Is not so easy to do in real life until you have dedicated switch on positive wire of DC cable, or specially designed DC connector which 100% always connects (-) pin before (+) pin.

Damn! Thanks for the feedback. So I suppose that repairing it is out of the question for what I can read on some posts about this, right?

Of course repairing is possible. Contact BMD service.

If this is the original Pocket Camera, repair will depend on part availability. Most likely it will be cheaper and faster just to buy another Pocket camera, or upgrade to the new Pocket 4K.
Cheers

Denny Smith wrote:If this is the original Pocket Camera, repair will depend on part availability. Most likely it will be cheaper and faster just to buy another Pocket camera, or upgrade to the new Pocket 4K.
Cheers

Yes. That was my initial assumption. I've sent an email to BM nonetheless. Thanks for the feedback!