360 Psu Red Led Options

[Boobers]

I have an XBOX 360 that, when plugged into the PSU, the LED goes RED.

The PSU works fine on other 360s, so that tells me there is a problem with this specific 360.

Using a continuity tester, it appears I have a direct short between the + and - ...

Visually inspecting the MB doesn't show any obvious trace issues or burned components...

Any other ideas on what would cause this??


Thanx


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This post has been edited by Boobers: Jun 17 2008, 08:08 PM

[hippodude100]

if you find out let me me know because I have the same problem
what did you change before it turned red ?

[Boobers]

if you find out let me me know because I have the same problem
what did you change before it turned red ?

Nothing..

It was in a lot of 360s that came my way..


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[hippodude100]

the x360 that was send to you with that problem where they all opened before ?
Maybe some electronic components where fried by a static charge.
But I have no idea where to look, all I know that its between the 12V and ground
It can be just a transistor that is burned or it can be something more complex like the southbridge.
Can you measure how much ohm there is between the ground and 12 V ?
mine is around 50 ohm.

This post has been edited by hippodude100: Jun 19 2008, 03:06 PM

[Boobers]

the x360 that was send to you with that problem where they all opened before ?
Maybe some electronic components where fried by a static charge.
But I have no idea where to look, all I know that its between the 12V and ground
It can be just a transistor that is burned or it can be something more complex like the southbridge.
Can you measure how much ohm there is between the ground and 12 V ?
mine is around 50 ohm.

OK, this is weird..

I went back to it..

NOW what happens is, I get a momentary flash of RED on the Power Supply, then it goes YELLOW and I get a 3RROD on the 360 with a sec code of 0001...

Let me check the ohmage and I'll get back to you.


B

[hippodude100]

You should try to replace the mosfets around the cpu.
Did you leave your xbox connected all the time ?
And when this happend you didn't touch anything or pushed anything ?
this could give me a place to look for shorts.
ty

[Boobers]

Pardon my ignorance, but what the heck are mosfets??

No, it wasn't connected at all.. I just put it aside and went on to other units...


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[Boobers]

OK, I just put the ohm meter on the MB..

I get a .3 ohm reading between the - and the + on the power connector.

Now, it's been a while since my high school electronics, but I think that this is a direct short, no??


B

[hippodude100]

yeah, Mosfets are sorta like transistors that cut down the power to a voltage that is easier to work with.
And it can handle large amps.
http://img.photobucket.com/albums/v285/g0t...0377_edited.jpg
the black things circled in blue are the mosfets, and when blow they will give you a 0001 or a 0002 don't really remember

This post has been edited by hippodude100: Jun 19 2008, 09:42 PM

[lostboyz]

considering FET is field effect transistor, I would say its more then just 'like' a transistor

there are many things i would do before just replacing them.

[Boobers]

Any way to check those MoFos to see if they are bad or not??


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[hippodude100]

I know it isn't exactlye like a transistor, and yeah you should measure them out before replacing them.
Do you have a better idea on fixing our problem ?