The hardly comprehensive HDZero VTXManual states:-

Blue LED works as the following way:


(1) Flashing at 1HZ periodically if VTX heat protect.
(2) Flashing at 2HZ periodically if VTX is on pit mode.
(3) Flashing at 4HZ periodically if VTX is on 0mW.
(4) Flashing 4 times if MSP connection is established with FC after VTX
is powered up.
(5) Going off if the camera is not detected.

If a camera is attached, and get NO blue LED, please:

(a) Check if MIPI cable is secured on both end of camera and VTX, and
check if cable itself is fine.
(b) Carefully check VTX MIPI connector if there is any bent pin.
(c) If it is Foxeer Digisight camera, make sure it is NOT on analog
mode.
- Digisight goes to analog when pressing left for 3 sec.
- Use stick commands blindly or disconnect mipi and use external.
joystick.
- Joystick does not work in digital mode. Must use stick commands
(Thr mid, yaw right) to enter cam menu (BF OSD disappears).

But there are other undocumented codes. For example, two Blue Flashes, Pause, repeat. These appear not to be properly documented BY HDZero to public.

And that is apart from the fairly unclear descriptions given.


Is there any clear proven correct list of fault codes???

You might find the online manual for the HDZero VTX easier to decipher. The double-flash with a pause, repeated is "Camera not detected" (i.e. #1 in the PDF manual), so their text descriptions in the PDF version of the manual for the LED statuses don't appear to be particularly good.

See the link below for the online manual...

https://hd-zero.github.io/hdzero-vtx-doc...ser_manual

EDIT: Below is the LED Status extract from the online manual (click to enlarge)...

Thanks. While I was offline this morning they sent me that table.

I REALLY didn't think they'd be so stupid as to have any differences let alone such violent ones between .pdf download and Online............... Wrong again!!

So I have "Camera not detected". Fine, except it and its MiPi work on another board. Mag lamp time when I can get back to it on the MiPi board connections.

BUT.......... I also have this indication on a new ECO, which is three wire soldered, and been nowhere near. SIGH.....................

Yeah, it really wouldn't take much to just put that nice graphic (and any others) in the PDF file. Pictures and images are much easier to read and understand than a sea of incomprehensible text.