Hey guys I had a fragged v1.3 xbox. After trying many things I eventually scrutinized the motherboard and found the unplugged power cable for the dvd had been resting on the motherboard and melted on a component. The component is right near the conexant vid chip and I believe marked with component number FB3B1. [/URL][/IMG] I thought at first it may have been a resistor but when I measured it I got no results and continuity test was negative too. I managed to pull one from a working xbox tonight, continuity test was positive but before I could resistance check it I lost it on the floor. So now I have two fragged xbox's missing that part (I powered up the second one without it and it was fragged so I suspect this was the fault in the first one, the part looked badly burned). -(also I tried a mod chip in the original fragged one with a different bios and got a flash code that was most likely related to the vid cable not being plugged in which made me look at the vid section on the motherboard). If anyone could help in identifying the component that would be fantastic, being SMD they would be cheap to replace .
If it's orange-ish, tan, or yellow it's likely a surface mount capacitor. For the correct value you'll need an LCR meter to read the capacitance of it.
ok making progress. I don't have a LRC meter here and unfortunately the electronics stores where I live are all going full domestic retail (tv's dvd players etc, goodbye resistors and capacitors ) so I tried to make one using an arduino and some spare parts I had floating around. It kinda worked but kinda sucked as well. So just bit the bullet and soldered the first spare SMD cap I could find in there, no change, still rebooted three times before fragged. So I had another look at the board and realized everything is very clearly labeled, just a lack of knowledge on my part for this particular component, i.e: capacitors all start with a Cxxx, resistors, Rxxx, transistors Qxxx. I'm familar with these but it was the FBxxx that was throwing me. Looking up reference designators I found FB is ferrite bead. Now to figure out how to measure it .
"Ferrite beads (L1 in the photo) filter high frequency power supply noise by converting it into a tiny amount of heat. Power supply noise can cause various problems for many parts, especially in analog audio and display circuits." - quote hackaday. Thats probably why the connector melted to it .
And ferrite beads are just a wire going through some ferrite, so unless the wire is broken it still should work, if you got a zero reading on your DMM then it is broken. You could try just bridging the pads and see if it works until you get a replacement.
