Xbox Slim E - Corona V6 - after NAND write - no respose

[ablegepu]

I'm not sure what yo mean. Sounds like you are using an analogue multimeter though. When you put the meter on ohms of any number even 20,000 and touch the 2 leads of the meter together the needle should go to 0. If it doesn't go all the way to zero then there should be an adjustment screw on the base of the needle and you should hold the leads together and turn the screw toward zero until the needle hits dead on zero. Now you can test the resistor by putting one lead on each side of the resistor. Also try swapping leads around and reading it that way and see what number you get. If it is right close to 10 then the resistor is good. Look up how to use the multimeter if you get confused.


I just realized I think you are referring to the probe or test lead as a needle when you say black needle. If that is the case then disregard all I said about analogue multi meters. Are you testing resistance from one side of the resistor to ground? Should be testing with a test probe on each side of the resistor.

 

[valentin]

I was saying that i have touched the right side of the resistor with the Black needle and the Left with the red needle. The multimeter was set on 20k and showed 2,7 ohms. When i have switched the needle so the Black was on the left side it showed me 12,13 ohms on 20k.

 

[ablegepu]

I Still dont understand your numbers, if it reads 2.7 it is 2700 ohms. if you are getting a different reading the other way around then the black and red needles (test leads) are not making a good connection to the resistor. you just need to easily rub the test leads on the side ends of the resistor and hold until you get a stable reading. When you switch them around you should be getting almost exactly the same resistance if you are making a good connection. Try again to measure the resistance but this time don't settle for 2 totally different measurements.

 

[valentin]

The multimeter is Ok so are the connections. I just get 2 different readings. I mean when i switch the needles. The multimeter is set to 20k. One time it shows 2,7 and when i switch the needles Then 12,17. And now when i have no power cord connected it shows 3,10 and 7,09. Its always set to 20k.

 

[ablegepu]

You are only checking resistance and your numbers make no sense at all a resistor is the same either way you test it so if you are getting 2,7 one way and 12,17 the other way then something is not right. It happens all the time, sometimes you get off the wall readings it just depends on how you are touching the resistor with the test lead. But if you can't understand what I'm saying then you need to do more reading on how to measure components. Especially resistors. Either way I am only trying to help you so if you don't want to fix it then take someone else's advice. That resistor is really close and connected to one of the pads you were soldering on when the console stopped working so if it got too much heat to the resistor it could have damaged it internally. It could be that replacing it might just get your console to booting properly maybe not but if you got a good solid reading on the resistor I could tell you if it is bad or not. If it really is 2700 ohms then it is definitely bad. But if it is 12,170 then it may be OK maybe not. But if you are getting 2 different resistance readings like you say then you are NOT getting a good connection where you black and red "needles" are touching the resistor. Even though it may look like you are, you most definently are NOT until you get the same reading with black on the left side as you do with it on the right. That is all there is to it.

Leave the power unplugged when testing..

 

[valentin]

I am touching the resistor everytime the same time but i get different readings.

 

[ablegepu]

do you have power unplugged to the board? If the power is unplugged and you still get two different readings then there must be some current stored up somewhere in the board causing it, Idk but if you desoldered the resistor it will give you the correct resistance but I dont know if you are able to do it right without damaging it or other components while still being able to reinstall it properly. only other advice I have is that I thought last night at work I had found your problem (Busted Trace) but as I got to looking at the other photos I realized that this was not the case but interesting all the same. Check it out.
green circle what I thought was a broken trace until I saw the other drops in the red circles.
Did you spill something on it? maybe it is dried up sprite.lol

Only other thing I can tell you is it could be the nand as mentioned before but I dont see why it would boot if the nand was corrupted, maybe you should send it to someone to have it diagnosed and repaired.

 

[valentin]

Yes no power is connected.

 

[ablegepu]

Log from J-Runner.

Initializing nanddump1.bin..
Corona 4GB
Glitch2 Selected
Nand Initialization Finished
Writing to O:\ from G:\J-Runner v02 Beta (288) Core Pack\nanddump1.bin
Done!
in 14:45:369 min:sec:ms

Is this the last thing you wrote to the nand? And is that the original retail nand that you read off of the console?
Also can you please post your whole Jrunner log from start to finish so I can see exactly what was done.

 

[valentin]

do you have power unplugged to the board? If the power is unplugged and you still get two different readings then there must be some current stored up somewhere in the board causing it, Idk but if you desoldered the resistor it will give you the correct resistance but I dont know if you are able to do it right without damaging it or other components while still being able to reinstall it properly. only other advice I have is that I thought last night at work I had found your problem (Busted Trace) but as I got to looking at the other photos I realized that this was not the case but interesting all the same. Check it out.
green circle what I thought was a broken trace until I saw the other drops in the red circles.View attachment 32271
Did you spill something on it? maybe it is dried up sprite.lol

Only other thing I can tell you is it could be the nand as mentioned before but I dont see why it would boot if the nand was corrupted, maybe you should send it to someone to have it diagnosed and repaired.

I have cleared the whole Motherboard so this busted traces are not there anymore.

 

[valentin]

I have writen the Original Nand from the first dump ive made. The Log is the same. Could the R1D4 resistor be the problem?

 

[ablegepu]

I think it might be the problem, if i didn't i wouldn't waste so much time getting you to measure it. It really isn't very hard to desolder but you have to make sure you are on a desk or something so you don't lose it. watch THIS video real quick and notice how the capacitors stick to his soldering iron, when the resistor comes lose you want to be ready to grab it off of the tip of your iron before it gets too hot. You can use your fingers to grab it if you are quick and you have rough hands it wont hurt a bit. Or if you have good size glass ashtray or even a glass jar will work you can just kinda tap the soldering iron down on the rim of it and the resistor will fall inside so you don't lose it. From the time you touch the resistor to the time you get it off of your iron should not exceed around 8-10 seconds depending on how hot your iron is.

You had rgh2 selected when you wrote the retail nand back to it is all, but I doubt it makes any difference.

 

[valentin]

This was selected automaticly by J-Runner. When i have Dumped the Nand it has automaticly set to Glitch2.

When i desolder the resistor What Then ?

 

[ablegepu]

then try to measure its resistance again and you should get a good solid reading on it no matter which way you turn it. just be careful if it falls on dark carpet or something then it is gone forever you will not find it. if the resistor is good then it will read around 9.5 - 10.5 with your meter set to 20k

 

[valentin]

When not ? I muss replace it with a new?

 

[ablegepu]

yeah just let me know what the resistance is and I let you know if it is still good or not. Im sure you will be able to find a 10k resistor somewhere. maybe you have a little scrap electronics / circuit boards with surface mount resistors, a 10K resistor is pretty common in anything that runs on 3.3-5-9-12 volts. or you can buy a whole bundle of different common resistors online, they are really cheap. I would send you a few in the mail for free if I knew the shipping cost. But try to do as I said if you desolder it so that if it is around 10K you can just solder it back on.
Today is my daughters 6th birthday and I have to leave in a little bit to take her to a surprise birthday party but ill check in here in a few hours to see what you have got.

 

[valentin]

Ok i let you know What hapened. And its possible that this is the problem why the Xbox is not starting ? I have checked the USB hubs and they dont show any voltage.

 

[ablegepu]

I think it may be causing the xbox not to boot yes.. It's just a resistor though its really not hard to replace just read what I told you to do and follow that when you go to do it.

 

[ablegepu]

It sounds like your 4 gig Nand has corruption ..Do you still have have the 5 volt signal at the USB hubs
Nobody does full dumps on 4 gig by the way .
I have had 4 different E slim 4 gigs Barf the Nand ..The final symptom is no 5 V power to USB hubs won't even attempt to start the console
When the Nand is normal it sends a ready command to the south bridge and the south bridge powers up the USB hubs
The only cure is 16-M/B nand conversion

I understand that because of what stucknvegas posted here and the fact that you have no voltage at the usb ports you think that may be your problem, but if it booted like you say it did, then you removed everything and the xbox would not boot, then nand corruption should not be your problem. Unless you kept the power plugged in to the console while removing everything and accidentally shorted something.

 

[valentin]

Hello guys now i have time to continue with this Xbox. I was not at home. So i have a hot air soldering i dont know if i translated it correct. I am posting a picture of it. I just wanna, because its better to do it with this machine like with a soldering iron. The question is on which temperature shell i set it to dont harm the Xbox Motherboard and all the other resistors. Thanks

The picture.