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Into quite a bit of a mystery here. Sold a fellow a modded Xbox and he traded in an old busted Xbox to save a few bucks so now I'm trying to fix it. When turned on the Xbox turns off pretty quickly but then restarts immediately, then the same again, turns off and then back on a third time and then stays on and shows flashing orange and red lights (the odd time it will flash red and green just to deepen the mystery). Googling the problem results in many ppl saying it's an 'av pack' issue if the av cable is not the problem but the restarting thing tells me it's more likely a PSU issue or a bios/mod-gone-wrong problem. Pulled everything apart completely, thought I found the problem with a burnt contact point near the plugin. Re-flowed all 4 points just to be sure and no difference at all. Kept googling and found a few encouraging leads including this url https://www.xbox-hq.com/html/xbox-tutorials-163.html#xboxerrorcodes1 and tried jumping that wire from the lpc pin 5. No f*ckin' joy. Also just a side note - the lpc vias are all plugged with solder (see pic) indicating that a modchip was removed at some point. Also I checked the solder points for the Xbox 1.0 TSOP and it looks like they've been done also - but the guy said he never modded that one. Thing is, the further into this I get the more convinced I am that this unit is fixable. Most people will just say eff it and chuck it or whatever but I really like to save old things if at all possible. I have included a pic of the wire I jumped (yellow wire) from the lpc pin 5 as the url tutorial suggested. The same pic also shows a mysterious blue wire that was here before I opened it. Asked the dude about the blue wire and he said no idea, never modded that one. In some of my Googling I found a post saying something about a D0 wire or DO wire described as a 'modchip enable wire', maybe this could be it? Any ideas about how to move forward or what the blue wire is for would be great, my thanks go out to anyone who has any ideas that might help,
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Board startup date: April 23, 2017 12:45:48