xbox 360 150w, no 12V

[mosfetratus]

Doesn't provide 12V.
When 5v stand by is manually shorted to pwr. en. pin power supply provides power, but when i release jumper it shuts off, doesn't register/hold enable signal.

traced enable pin to "LTA502SI-1". I couldn't find datasheets to it.

Looking for advice, if this is the right suspect.

[mosfetratus]

Re: xbox 360 150w, no 12V

when i short std. by with 5V to enable 12V, green light goes for few seconds than goes red.

Console works fine, tested with good power supply.

[mosfetratus]

Re: xbox 360 150w, no 12V

Appears that part i suspected not to be working is actually OK, did switcheroo with working power supply.
Any tips, because my knowledge about power supplies is zero.

[stj]

Re: xbox 360 150w, no 12V

is it supposed to latch on?

[mosfetratus]

Re: xbox 360 150w, no 12V

is it supposed to latch on?

no idea :\

board photos
https://ibb.co/3R9VvmV
https://ibb.co/gPgc0hG

[mosfetratus]

Re: xbox 360 150w, no 12V

Noticed gate voltage for output mosfets (FDPF3860T) is low, o.4V. Needed to remove glue, to see components.

Yellow circle component is semi short between yellow points, voltage drop of 033 in diode mode. So i removed it, still same result between points.

https://ibb.co/dPmKRZb

Power supply does have 12V output when i short 5volts on power supply plug to simulate power button press, but soon gets RED light on the supply when holding short.