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[Burned_Alive]

I have a v1.0-1.1 xbox and it is dead (wont power up at all) and im currently unsure whether its the psu or the motherboard, ive done a continuity test on the fuse on the psu which comes back fine, but im unsure how to properly test if the psu is putting any power out.....

What setting should i put the multimeter on and where should i be testing?

I did a search and looked through the tuts, but couldnt find anything covering this

Thanks in advance!  

[dsscircuits]

Somewhere here there is a list of what voltage is on what pin of your PSU I don't remember off hand. I know the power for you DVD or Hard Drive plugs is going to be 12V so turn your meter to 20 volts DC unless its auto ranging then just turn it to DC. ! question did your Xbox just quit out of the blue or were you working/ soldering on it?

You might look on the home page under tutorials, IIRC there is a tutorial on converting a 1.0-1.1 power supply to a 1.2-1.5 power supply that tute might have voltages for your pin outs

[Burned_Alive]

I wasnt working on it, i bought the xbox as faulty and was told that:

"xbox was working fine until a few days ago, tried to switch it on but nothing happens...no life in it at all"

So i bought it cheap and figured its probably a psu fault that can be easily repaired, if not ill just split it and sell the bits, ill double check the tutorials

[dsscircuits]

Has the Xbox ever been opened before?

[Burned_Alive]

Yeah, it stopped working whilst there was a modchip in it, he took the chip out and still nothing

Sorry, i guess thats important!

[Burned_Alive]

Just having a look over the board, the top is fine, obvious where d0 and the chip were soldered but no damage to the area that i can make out (even with a magnifying glass)

But having checked out the bottom there appears to be a bridge and some trace damage.....not sure if this is enough to stop the box booting but i presume it is...

Areas circled in red are broken traces? and the blue circle is the bridge:


I presume it should look like this:


Is this an easy enough repair or will it be fried?

The area to the fair right also looks messy but appears to be no damage

[Burned_Alive]

Guess i should've looked a bit further! Was cleaning the box up and spotted this nice big flash mark......



Then check the PSU and.....




So i guess thats the problem, even though the damage on the bottom isnt good news i dont think its effecting it, so time to source a new psu i guess!

[wup]

lol, ya that is more then enough to stop your xbox from working, that's some serious damage done to the board. I think this one might be unrepairable .

::Edit:: I see you posted pics of the psu well i was typing my previous message, anyways I'm pretty sure you bought a completely ruined system, i am 99.9% sure that the mobo damage will make it not work even with a working psu.

[Burned_Alive]

I guess ive got nothing to lose by trying out a new psu, he said it suddenly stopped working, which is definitely explained by the blown psu!

Whether or not the trace damage is effecting it remains to be seen...

[thedustycelt]

The trace damage is repairable. You are correct with your proposed repair pic. It looks like he couldn't figure out where the alt d0 was...

And he sucked with an iron.  

I am not sure off the top of my head what the other two traces are, but the alt d0 trace being broken will keep it from booting the original TSOP. It is possible that the board was working with a mod chip in place. The broken traces look like they all go to the TSOP, so they wouldn't be needed if you were booting off a chip.

If it were me, I would go ahead and repair the traces (asuming that you are good with an iron). Read the trace repair guides and make sure to use flux and 30 gauge wire.

As far as the PSU, you might be able to replace the fried component, but personaly I would just swap it out for a good supply. (With that kind of damage, it is dificult to tell if there is further damage that you cant see...)

It is rewarding to repair a trashed box!
Cheers  

[thedustycelt]

Here is a pic of a good bottom of the board that I found if you need it...

[Burned_Alive]

Thanks!

Are the solder spots inline on the trace important? or can i just run the trace straight through that bit?

[thedustycelt]

No the pads arn't important. You can just bridge it with some wire. They are there for testing in the factory...

[Burned_Alive]

Ok cool, thanks alot, i really appreciate your help

Looks like it wont be too hard to fix, might use the conductive paint trick instead or grab some kynar

Thanks again!

[thedustycelt]

Personaly I don't like the conductive paint. It always has some resistance and on sensitive electronics it dosn't seem to work as well.