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Solved Xbox Only turns on with eject button and powers off by itself!

zastin17

zastin17

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So I found a original xbox from goodwill for $4 and I could not resist even if it was broken. I powered it up and noticed it would only power on with the eject button and it would turn off after a few seconds. I did get a picture on the tv though when it was on. I opened it and looked for bad caps. They were all perfect. The system was not ever opened and there was no dust inside of it. So it had light use. I then looked the the long trace on the edge of the mobo and found that the trace closest to the edge looked to be but or corroded. I tested with a multimeter and the trace had no continuity. So I repaired the trace thinking that was the problem but it did not fix anything. What else can look at. I am looking for any other damage but cant find any. I tested the power supply in another xbox and it works fine. Other than the broken trace I fixed, the board looks brand new and it had no dust in it when I opened it. I can get to the dashboard if it says on long enough so the hard drive is fine. What else do I look at? Also I noticed if I don't have the av cord plugged it it will not turn itself off but obviously wont boot since there is no av cord. The xbox was mf in 2002 and I think its the first board revision made.
 
HexDecimal

HexDecimal

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Really sounds like a wire is shorting somewhere, but since you opened it and checked I don't know. I would follow the connection from the power button and eject button and see if they touching or connecting anywhere where it looks like it shouldn't be.
 
zastin17

zastin17

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Really sounds like a wire is shorting somewhere, but since you opened it and checked I don't know. I would follow the connection from the power button and eject button and see if they touching or connecting anywhere where it looks like it shouldn't be.
So I fixed the power button issue by completely redoing the trace start to finish. The other problem is that it turns on then off. If I leave it alone for a while it will turn on to the dashboard. If I keep trying to turn it on the time it takes to turn off gets shorter. Based on these symptoms I think it might be the power supply. There is not bad caps on the psu and no cracked solder joints. What else could I test on the psu. I also notice that sometimes the psu makes a hissing sound like the transformer is arching or something but I can't figure it out. The system is obviously shutting down do to a power problem. Its like a cap has to much power. Since it works after I wait for a while. Caps slowly discharge over a few minutes of time so the symptoms are pointing to a CAP. All the caps are visually fine so I don't think that's the problem. Anything else I should look for?
 
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HexDecimal

HexDecimal

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Power supply would make sense. But original xbox are so cheap now. It would mare sense to buy a new one and not to try to find a psu.
 
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