JR North wrote:

Unlikely. The 12V socket should be the pink one in the first picture.
There should be a diagram on the case showing the polarity of the plug.
No ac/dc device would have a 4 pin socket like that for a power cord.
JR


Not true. I have a 12V Sony color monitor with the same type of jack
used for 12V DC input. Sorry I don't have the pinout but two pins are
ground, one is +12V and the other is for an external picture (contrast)
control.