2 FUBAR'ed XBoxes

[Berzy]

working on 2 of my buddies xboxes and i'm getting a boot-up error on both. 1 was working and i was just adding another modification to it and now neither will work.
don't know what happened, the soddering job is solid and i've tried working x2 lites in both and i'm getting the same error.

the only thing i can think of is the xbox was exposed to static some how. so i was wondering how could you find out and can it be fixed if that's the case.

also wondering if the xbox should boot up normally if the mod is unplugged from the wire harmess or do you have to desodder the wire harness from the motherboard.