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

[valentin]

Hello, i have posted earlier a thread about the New Corona V6 motherboard that i canot get glitched. So i desided to let it be. I have writen back the original NAND worked with NAND RW KIT installed. But after i desoldered the NAND RW KIT the XBOX doesnt start. The power suply diod is on orange and i start it but nothing no response. I checked the pad on how i have soldered it but they are ok.

CAn somebody help ?

Thanks

 

[Mikaz]

Need good quality focused photos

 

[valentin]

I will post a photo laser i am not at home now. The problem was that it worked but afteri desoldered the Nand Rw kit then the Xbox will not start. No sound, no light. I think its something with the pads that was soldered to Nand Rw Kit.

 

[valentin]

Here are the Photos i have taen today. I have soldered the QSB back because i was thinking that then it will work but no.







Shell i desolder the QSB ?

 

[valentin]

Here is a pics without the QSB.

 

[valentin]

Is there a way i can measure the pads ? Or somehing. Because i worked until i have desoldered the QSB.

 

[ablegepu]

scrape the traces leading from the pads with a fiberglass scratch pen and test continuity from the pad to the trace you will likely have to do this on both side of each pad, and some you will have to flip the motherboard over to find a trace to test.

 

[valentin]

scrape the traces leading from the pads with a fiberglass scratch pen and test continuity from the pad to the trace you will likely have to do this on both side of each pad, and some you will have to flip the motherboard over to find a trace to test.

Why are one of thouse you painted yellow and one red ?

 

[ablegepu]

all of the yellow lines lead to a resistor or a pad that you can place a multimeter's test lead. so you would do a continuity check from the middle of the pad to the component or pad at the other end of the yellow line. That would be the first thing I would do. Do you have a multimeter andd do you know how to use one? The red dots and lines are just some places you can scrape the varnish off of the board and place a test lead there.

 

[valentin]

Yes i have a multimeter and i know how to use it. Some of the pads doesnt have a connection on this side i muss find a other on the other side. For example from the upper pads from left to right number 1,8 i guess, and 10,11,16 when we continue with the next line.

 

[ablegepu]

pads are numbered like this.

 

[valentin]

Then the pads 1,4, 6, 15 and 16 i guess.

 

[ablegepu]

more like 1, 4, 5, 6, 9, 11, 13, 15, & 16... But start out by testing all others, and any of those pads to the trace they have on the topside of the board. some of those pads may be the end of the trace and some may go through the board to the other side. Your problem is most likely going to be one of the traces on the top side, either that or you have a bridge somewhere else or cpu_rst point broken from it's trace, or broken/missing components.
here is a better picture of a different mobo, probably taken with a camera worse than what you are using.

 

[valentin]

I have now tested all the pads and then are OK. What now ? What could be the problem ?

 

[ablegepu]

i would take the motherboard out and check CPU_RST against the alternate points, look over the board very carefully for any broken/missing components like capacitors or resistors.
You could also take some clear focused pictures of the motherboard and anywhere you soldered to.
That would help narrow it down, The whole reason you didn't receive any useful help in the other thread you started is because of the fact that you refused to take clear pictures that where up close and focused. Take your time, even with a zte phone that has a 5 megapixel camera I am able to take pretty clear pictures but I have to prop up on something to hold it steady so it focuses correctly.

 

[valentin]

These are the clearest Photos i can take. I have tested the CPU_RST point with a alternative point and they are connected.

 

[ablegepu]

at least need 1 clear picture of the bottom side of the board (opposite where the pads are).
You can also check out this thread xmods made CORONA 4GB QSB REBUILD.. I doubt it will help much though considering it's a different motherboard revision..

 

[valentin]

You mean the side where the X-Clamp is ?

 

[valentin]

These are the clearest photos i can take.

 

[ablegepu]

they are much better and yeah that is the right side. Ok so you said you wrote the original nand back to the console and it booted. Exactly when did you remove the DGX and the Postfix adapter? Before removing the NAND R/W QSB, or after? Basically did you test to see if the console booted after removing the DGX and Postfix adapter, or did you just remove it all after it booted the stock nand?