SNES Repair??? General Console Repair Issue

[thesteve]

Is it low when power switch is off?

[schweaty]

steve, you must be a goddamn genius.  No, the voltage is fine while the switch is off (9V+).  As soon as you turn on the switch, it goes down to 4V.  This indicates a shit ac adaptor, yes?

[thesteve]

No it means the short is after the switch, before the regulator

[schweaty]

why do i feel like the kid playing Chutes and Ladders who hits the last chute right before the finish line

[thesteve]

lol, IDK

[thesteve]

im not 100% what parts are between reg and switch
if you lift the input pin of the reg and jumper the + input from the jack it will isolate it
alternately if you remove the reg and turn power on it shouldnt pull the voltage down
trying another supply first is best
if supply doesnt get hot when outputting 4V its likely a bad supply