Power over DVI connector?

[Mamybopo]

I found this old 7" 800x640 touchscreen panel from a Konica business printer. It has a DVI-D connector, but that is the only connector on it. No power!

The DVI standard has 5V 50mA on pin 14, which seems much too little to drive even a small TFT screen.

Inside the device, there's a switching PSU board with a 125V 1.5A fuse, among other things.

I'm afraid to plug this monitor to my graphics card to test, because I suspect that Konica simply used the DVI connector because it was a cheap and available 24 pin cable.

What is the easiest way to determine if it is safe to connect this to a regular DVI output and perhaps supply 5V externally?

[iwtommo]

Follow the traces from the fuse to wherever they go?

Surely a dvi connector doesnt send 125v at 1.5a

[Yansi]

The DVI connector on this display is nowhere close to a DVI signal standard, as far as I remember forum thread from some years back.

DO NOT plug to the PC graphics card!

[Mamybopo]

Was that an eevblog forum thread?

[Yansi]

I am not sure, unfortunately. But I recall well a discussion about a display panel from a printer, with a DVI connector, that was nowhere near the DVI connector.

But that should be absolutely clear to anyone, who knows a bit about DVI, that you can't supply a 7" LCD panel from the integrated 5V DDC power, and that there is no way in hell to manage a touch screen with it.

Just open the sucker, I recall that there was also Texas Instruments flatlink receiver chip, like a SN65LVDS86A. (So no TMDS signalling either, good old LVDS instead).

Should be easy enough to interface, if you work out the connector pinout.