Need help with knocked off resistor near RAM (R3R1)

[sicamore]

Hello,

Before I go any further, let me explain the back story so you guys know exactly what is happening here:

The other day I received a Zephyr xbox for repair. It would boot, however sometimes it would freeze on the logo. Other times it would boot fine, but in any case I would get short black lines on the screen (reminiscent of cracks) and a loud popping sound. Even if it did boot fine, it would freeze loading any game or doing something like checking the live connectivity. This told me that there was probably a ram access problem, however I can't say for sure since I only have so much understanding of the innards of the xbox 360.

Anyhow, before trying a reflow I put pressure on the ram and southbridge with my fingers and tried booting the xbox again to see if that helped. I didn't crush the chips, but I did put a firm hand into pushing them down. The ram chips were on top of the board and exposed, so I was obviously not pushing on the ones under the gpu heatsink. This is where something went crazy, and the tv artifacted with a damn loud screeching noise. I turned that thing off before I lost my hearing. Upon booting again, I got the red rings, secondary code 0102.

Inspecting the board, I found resistor R3R1 hanging off its pads; it is is right near one of the ram chips on the bottom of the board. I would attach a picture however I don't have a camera capable of capturing such a small component, sadly.

So, my question is - was that missing resistor the ultimate cause of my RROD? Or was it the cause of the freezing before the RROD, and I got the RROD simply by pushing on the components too hard? I could solder in a through-hole resistor if I knew the value of the missing one, if that could fix the problem. Or maybe that resistor wouldn't cause boot fail anyways?


Thanks in advance

EDIT: The error code I got was not specific to RAM it seems but still could be under that

 

[Sasuke Uchiha]

your error is gpu related if it boots but has artifacts all over the screen then its gpu

 

[sicamore]

It now has a RROD, and I'm curious as to if the resistor is the cause of this. Will no longer boot.

 

[ultimate360]

You will need to re-attach the resistor later (to play safe even though it probably doesn't make a difference). But right now, you have a bad gpu connection to the board. The noises and messed up screen are late warning signs of a red ring error in progress. The solder ball(s) that are bad under your GPU have lost connection entirely, which is now throwing your 0102. Reball the GPU, and problem solved You can test my statement by just turning on the console and then just let it be on for about 10-15 minutes. Then shut it off and immediately restart it, it should boot. Which proves its the GPU.

 

[sicamore]

I stuck it in the oven, however it is still giving me the rings. I think I did short something under pressure, cause the oven would have at least temporarily solved any loose balls. How would I go about reballing ram if the GPU reball doesn't help?

 

[Sasuke Uchiha]

please tell me your talking about a bga oven and not a kitchen oven

 

[sicamore]

please tell me you're talking about a bga oven and not a kitchen oven

infared bga, I don't stick things in ovens. Anyhow, like I said, needs a reball. Or I could just scrap it.

 

[ultimate360]

Well, its a zephyr. Its up to you, but they are just as unreliable as a xenon board. Honestly it may be a better idea to just replace the board with a jasper. That is what I've began doing with zephyrs, unless they are for sure just a GPU reball, but yours sounds like it needs ram and GPU reball.

 

[sicamore]

seems like the only solution. thanks for the help guys.