Non-working PS3 board

Is the short on the AC side or the DC output side?  Many times these are not fixable.  There are a few chokes that may have shorted.  You may find that once that is resolved you have other issues on the DC side.  No schematics available so you are kind of on your own.  G

Thanks for the reply, I know it is a long shot.  The short is on the AC side.  Any idea what the square 4 terminal component is on the back side of the board right next to the input connector pins?

Choke.  Square right?  G

Yes the square component as circled below.  A pin out or component number for this chip would be very helpful.

TWS, Welcome to the Forum!  You have come to a good place!  George 'GGG' is one of the experts on the Forum, so you will get as much help as is possible.  I hope you will post something about yourself and your train interests in a topic.

I suspect you'll have to trace out the leads to that part.  Most chokes only have two leads, are you sure those are not some sort of pulse transformer?  With no diagrams, hard to know.

Thank you so much for the help.  I removed the suspect component and it was a 4-terminal common mode choke.  I temporarily by-passed the choke, and have confirmed the board is up and running.  So, my next question is does anyone know what value choke was to make the permanent replacement?

Murata  DLW5BTN101SQ2L

Since that one is obsolete and looks unobtainable, this looks like a suitable replacement: Murata DLW5BTM101SQ2L.

Thank you again for your help.  As long as I am ordering, I would like to replace the parts for Q201 and Q309 as I suspect one of these may have caused the choke to short out.  The markings are not on the chips on my board, would you happen to have those numbers as well?

Not me, maybe GGG has them.

Hi all - still looking for help with a positive ID on this component that I think is a voltage regulator.  Any help would be appreciated.

Motor control fet . part number on it . Is it shorted, it does not control direction, but a stop current for the circuit. G

Mine does not have any markings on it, if you could provide it is easy to change.  It is not shorted.  I have track voltage at the Motor+ pin and an open circuit at the Motor- pin.  Sound/smoke everything else operates properly.  This is why i narrowed it to the FET.  Thoughts?

Q201 is a FDD4141 P-Chan FET.  I'd be tempted to also replace Q309, a FDD8447L N-Chan FET.

Great - thank you for all your help.  Parts are on order, we will see if they fix it.

No need to replace other.  You can clip the legs on the shorted fet and it should work.  Then replace. G