m400, windows failure to load

[cncsnw]

After a couple minutes (the normal time to startup and get to the blue CNC12 screen), do the various indicator LEDs in your jog panel (e.g. Auto Spindle, Auto Coolant, INCR jog, turtle jog, etc.) light up?

If so, that says that the computer is starting up, Windows is starting up, and CNC12 is starting up; and therefore the problem is solely with the display.

If the jog panel LEDs do not light up, then the computer is not necessarily booting up.

If the problem is just with the display, then you should check the connections through the HDMI-to-VGA adapter. If you have an external VGA monitor and cable, you could try plugging that into the HDMI-to-VGA adapter, to see if the problem is with the built-in LCD display. If you have a separate computer with a VGA output that you know works, you could try plugging that to the built-in LCD, to see if the problem is with the HDMI adapter.

[NeonVortex]

If the above methods don't work, you can only try checking for hardware issues and cleaning the system.

[Fueler1]

Plugged in a monitor and it is confirmed that 12 fires up.
It leaves the following messages which is of no concern at the moment.
When plugged into the outside monitor none of the command keys are lit up.

This brings me to this board which appears to be the screen power source.
If I unplug the black power plug the screen goes dark. Plugged in and the screen is white.
Note that when plugged in normally the command keys light up but none are functional.
How to determine if it is the board or the screen itself at fault?

[spikee]

In my expirience, powersupplies are the main cause of weird stuff like this. 99% is one or multiple caps dying.
Other suspects are worn flash (usb stick/sd card/flash chips)

[cncsnw]

I assume that by "command keys" you mean the jog panel keys on the Centroid jog panel keypad, on the right side of your console.

It is unlikely they will light up and function until you have pressed F1 "Continue anyway" in response to the hardware change prompt.

As far as I know, there is no interdependence between the LCD display and the jog panel. The jog panel will work the same, regardless of whether or not the LCD display is working.

The LCD display has only one power input: 12VDC through the black barrel-type plug. With a little effort, you could patch in a different, independent 12VDC source.

Where does the 12VDC for that plug currently come from?

I wonder if perhaps it used to come from a large ATX-type power supply (which also powered the micro-ATX motherb0ard); and if perhaps the upgrade kit you got from Centroid included a small switching power supply (maybe a MeanWell LRS-35-12) to make 12VDC for the LCD panel and fan. If that is the case, perhaps the 35W supply is not sufficient. You could test that by connecting a larger 12V supply.

[Fueler1]

Yes, to jog panel keys.
I was pondering whether or not to hit the F1. It is not obvious what to do there. I did not want to make matters worse.
The power comes direct from the little power supply included in the kit.
I will rig up the old supply to power it but one would hope that the skunkworks had supplied enough watts. We shall see.

[Fueler1]

Found this in my project box. Possible?

[cncsnw]

If it works, that will tell you something useful (e.g. that the LRS-35-12 is faulty).

If it does not work, that won't tell you anything useful, because if the LRS-35-12 (with 3A output) is simply not powerful enough, then the RT-50B (with 2A output on the +12V rail) won't be powerful enough either.