Hello.
I’ve got a Vim4 board and PoE shield for it. When I plug in power adapter without PoE shield, board starts and works perfectly, but with shield connected it starts once per 10 times. Could the problem originate from a small interconnection black/red cord? Or, maybe, in connectors? Or my PoE shield is broken?
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Hi @Vsaritos
Are you able to provide further details of the PoE router to us?
Basically, you will need to ensure the PoE module able to provide up to 24W powers.
Good day!
I’ve left comment to my order on AliExpress.
I’ve ordered a separate 12V 2A (as I saw it in your shop on AliExpress) PoE injector adapter. The problem is - board does not start with connected shield and type-c adapter (diode flashes or lites in half-voltage) and diode does not lite on at all with PoE adapter connected.
With m2x disconnected sbc works like a charm.
12V 2A are from the m2x spec. This gives 24W power supply. 
Hi, @Gouwa.
Here are some videos of the problem.
Some more.
Hello @Vsaritos
Does Type-C adaptor power on well if you just connect M2X board to M.2 connect and not connect the VIN cable ?
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Hello, @numbqq. No, the board does not start with m2x connected to m2 and VIN cable not connected. See video below.
I’ve checked m2 connector on vim4 with m2 nvme disk and it works perfectly, so the problem is 
with m2x shield…
@numbqq i have exact same problem. VIM 4 randomly cannot start (no led blinking, no button reactions, no hdmi output) with M2X module attached.
How about remove the M2X module?
Without M2X module Vim 4 runs flawlessly
Hello @netosha
Have you attached devices on the M2X? And how you supply the power? Please use our PD adaptor to supply the power.
@numbqq I tried with Apple PD 35 and 96 watt power adapters and ZMI QB820 (upto 45 watt via PD). None of them works. No devices attached to m2x.
Suggest you to use our PD adaptor to supply the power.
Recently, I bought a PD power supply approved for the Vim 4 from Aliexpress. However, it still isn’t booting when m2x poe module is attached. I hope to upload a video soon.
What I do for testing the power requirement is to cut the opposite end off the usb cable and connect to a metered power supply. This provides us the ability to do power measurement, that answers many question. Its impossible to know what is going on with a wall plug. Was not aware of the POE board, that would be really nice for a security cam!!!.
FYI, on those selling online, if they say approved that does not mean anything. If memory is correct the official one is actually branded Khadas. We don’t use that, ours are medical grade wall plug-in that has better regulation than most.