On 13/07/2016 20:41, Jon Elson wrote:
N_Cook wrote:

Been in there and resoldered , still intermittant.
Don't think its a break inside the power lead. Seems to be in an annular
sense, if the line "plug" lays in one "o'clock" angle then contact breaks.
Tried cleaning plug and socket of coarse,and contact treatment oil and
nothing obviously wrong with line plug plating/surface, but before
trying to replace plug and socket , what to try?

Is this the triple-coaxial plugs they use on Dells? The outer barrel is
gnd, the inner side of the barrel is +19.5 V, the center pin is some
resistor or something that classifies the power supply's capacity.

I'm not exactly sure what kind of contacts are in the laptop's socket, the
supply's plug doesn't have any springy parts in it. I'd guess the laptop's
socket contacts have gotten worn or lost their spring temper.

Jon


Although the pin of the chassis socket is shrouded so could be 3 wire, I
think the line plug is 2 contact. Taking a closer look at the line plug
its probably a plating problem on the patch where the cable would
normally have lane "o'clock" sense.
I'll try and confirm the plug is 2 contact only and try finding a
replacement and fudge-jumper that in initially.