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Unsolved Xbox 360 Jasper RROD (error code 0001)

FakeSypha

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Hi everyone. It's me again. This time around, my Xbox 360 fat (Jasper/Kronos) just got RROD when I was transfering files over FTP.

The hidden error code it shows is 0001, which is related to power supply problems, either from the PSU or the motherboard itself. From what I read is probably related to a transistor (mosfet), capacitor, southbridge chip, and/or many other things.
When I turn it on, it goes immediately to the RROD flashing lights. Fans, disc drive, hard drive don't even attempt to turn on. It seems it's self preserving from voltage problems.
The light on the PSU goes from orange, to red (less than a second) and then stays orange. I tested the PSU alone, bridging the "power enable" and "5vsb" pins. It powers up just fine, with a green light. Also tested the voltages and delivers 12v and 5v as intended.
I tested the Xbox 360 with a another PSU and RROD still happens, so at this point I rule out the possibility of a faulty PSU problem. Which probably means the fault is in the motherboard...

Btw, the console is RGH modded with a ACEV3 chip. I tested desoldering the chip and nothing changed. RROD is still present on turning the console.

What are my options from this point? I've read, that desolder each and every mosfet to correctly test them is the common solution for this kind of error. If so, what a pain in the *** man :facepalm:
 
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Hi everyone. It's me again. This time around, my Xbox 360 fat (Jasper/Kronos) just got RROD when I was transfering files over FTP.

The hidden error code it shows is 0001, which is related to power supply problems, either from the PSU or the motherboard itself. From what I read is probably related to a transistor (mosfet), capacitor, southbridge chip, and/or many other things.
When I turn it on, it goes immediately to the RROD flashing lights. Fans, disc drive, hard drive don't even attempt to turn on. It seems it's self preserving from voltage problems.
The light on the PSU goes from orange, to red (less than a second) and then stays orange. I tested the PSU alone, bridging the "power enable" and "5vsb" pins. It powers up just fine, with a green light. Also tested the voltages and delivers 12v and 5v as intended.
I tested the Xbox 360 with a another PSU and RROD still happens, so at this point I rule out the possibility of a faulty PSU problem. Which probably means the fault is in the motherboard...

Btw, the console is RGH modded with a ACEV3 chip. I tested desoldering the chip and nothing changed. RROD is still present on turning the console.

What are my options from this point? I've read, that desolder each and every mosfet to correctly test them is the common solution for this kind of error. If so, what a pain in the *** man :facepalm:
Hi, FakeSypha FakeSypha , You basically answered your own question there.

First things first make sure there's nothing obvious like a burn mark or a swollen/exploded capacitor. If this isn't the case you unfortunately will need to test all the Mosfets and related components with a Multimeter to determine the cause. It can be done but as you say, it's definitely a pain in the arse.
 
FakeSypha

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Hi, FakeSypha FakeSypha , You basically answered your own question there.

First things first make sure there's nothing obvious like a burn mark or a swollen/exploded capacitor. If this isn't the case you unfortunately will need to test all the Mosfets and related components with a Multimeter to determine the cause. It can be done but as you say, it's definitely a pain in the arse.
Thanks for the reply!
I already checked for the obvious and haven't seen anything unusual. No burnt marks on the PCB, or swollen caps, or anything with physical damage. I also haven't seen anything that could be bridging something in the motherboard.
I'll test tomorrow if the motherboard is getting 12v, 5v, 3.3v, and 1.8v. I should test this while conecting the PSU and powering the Xbox 360, right? I guess testing from the stand by mode would only get 5v.
 
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Thanks for the reply!
I already checked for the obvious and haven't seen anything unusual. No burnt marks on the PCB, or swollen caps, or anything with physical damage. I also haven't seen anything that could be bridging something in the motherboard.
I'll test tomorrow if the motherboard is getting 12v, 5v, 3.3v, and 1.8v. I should test this while conecting the PSU and powering the Xbox 360, right? I guess testing from the stand by mode would only get 5v.
Yeah, you'd have to see what it's pulling when it momentarily turns on in that case.
Standby should give you things like the 5V standby voltages, see if they're spiking when you turn it on...
 
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I just tested the voltages. It seems the 12v lanes are the culprit. I didn't get any readings while turning on the xbox. I tested for continuity on pins 4-5-6 (three 12v lanes) on the power socket and are shorting with ground. And of course it shouldn't being this way.

While on standby mode or even when flashing the RROD lights I could get 5v, 3.3v and 1.8v on the motherboard just fine.
If need I could upload a picture from where I tested these voltages.
 
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Anyone know which are the MOSFETs that work with 12v on a Jasper mobo? There are 19 on the top side, and I'm positively sure I don't want to desolder each one of them, lol xD

Sorry for the double post.
 
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Anyone know which are the MOSFETs that work with 12v on a Jasper mobo? There are 19 on the top side, and I'm positively sure I don't want to desolder each one of them, lol xD

Sorry for the double post.
Ouch dude, I ain't got much else to offer unfortunately :frown:
 
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Ouch dude, I ain't got much else to offer unfortunately :frown:
Thanks anyway, man.
I was googling around and found a couple of MOSFETs that work with 12v and are somewhat close to the power socket. I'll start with those once I get a heat gun, which would hopefully be on Wednesday.
In the meantime, I'll keep googling for info. To my understanding, if I find the shorted MOSFET (or any other shorted component, for that matter) and remove it, I shouldn't get the 12v short on ground anymore.
 
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Thanks anyway, man.
I was googling around and found a couple of MOSFETs that work with 12v and are somewhat close to the power socket. I'll start with those once I get a heat gun, which would hopefully be on Wednesday.
In the meantime, I'll keep googling for info. To my understanding, if I find the shorted MOSFET (or any other shorted component, for that matter) and remove it, I shouldn't get the 12v short on ground anymore.
That's right. Remember to leave the heatgun on a low speed or you'll risk blowing components all over the board when the heat is applied. Also Heat the board evenly as they're prone to warping which will also cause a RROD, especially on phats!
 
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That's right. Remember to leave the heatgun on a low speed or you'll risk blowing components all over the board when the heat is applied. Also Heat the board evenly as they're prone to warping which will also cause a RROD, especially on phats!
Yeah, I'm aware of that. Thanks again for the tips man!
My intention is to wrap the rest of the components around the MOSFET with tin foil and/or cardboard to minimize the possible damage involved using a heat gun.

Anyway, I just hope is a FET or two and not some IC. Also, are those FETs common enough to buy them? or is more easy to buy a broken X360 and use it for scraps?
 
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Yeah, I'm aware of that. Thanks again for the tips man!
My intention is to wrap the rest of the components around the MOSFET with tin foil and/or cardboard to minimize the possible damage involved using a heat gun.

Anyway, I just hope is a FET or two and not some IC. Also, are those FETs common enough to buy them? or is more easy to buy a broken X360 and use it for scraps?
I would think so? Probably easiest to find on eBay or places like AliExpress if you can't find them on the likes of Amazon. I usually order lots of SMC components from eBay as they're cheap and cheerful.
 
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Well, the good news: I found 2 mosfets that are fried. Tested outside the board and the are completely busted. I tested the rest of the mosfets (yes, desoldered +20 of them ffs) and they are OK.
Bad news: the 12v shorting on ground is still present. So I ran out of ideas. I can't seem to notice any other stuff that could be busted. No busted or leaking caps, no burn marks on the motherboard o anything like that.

Right now is entering an area in which it surpasses my resources, my knowledge, my time, and overall my will to fix it, lol.

This Jasper gave me a good run, so press F to give respects.
 
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Well, the good news: I found 2 mosfets that are fried. Tested outside the board and the are completely busted. I tested the rest of the mosfets (yes, desoldered +20 of them ffs) and they are OK.
Bad news: the 12v shorting on ground is still present. So I ran out of ideas. I can't seem to notice any other stuff that could be busted. No busted or leaking caps, no burn marks on the motherboard o anything like that.

Right now is entering an area in which it surpasses my resources, my knowledge, my time, and overall my will to fix it, lol.

This Jasper gave me a good run, so press F to give respects.
A definite F, I have heard of very few major Jasper failures and never had one fail on me. RIP.
The only things I can think of along the power lines are the mosfets, Caps, and a few resistors.
 
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Could be a dead CPU, it is also possible the traces around the burnt mosfets are damaged, check the continuity from power source all the way to the CPU

Ive had this happened to me once when by mistake a solder blob dropped on the ethernet IC , I thought a dead cpu but by accident I found the blob.

Inspect the board thoroughly on main ICs , check if the fan rotates.
 
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Could be a dead CPU, it is also possible the traces around the burnt mosfets are damaged, check the continuity from power source all the way to the CPU

Ive had this happened to me once when by mistake a solder blob dropped on the ethernet IC , I thought a dead cpu but by accident I found the blob.

Inspect the board thoroughly on main ICs , check if the fan rotates.
That's not it as he said there are no obvious "dropped solder" or anything. Its definitely not a dead CPU. A shorted CPU would throw 0002, and a dead but not shorted one would throw 0022.
The 0001 short circuit is a capcaitor, or a MOSFET on the V_12P0 mostly, but can also be on V_CPUCORE, V_GPUCORE because some of that circuit takes from V_12P0.
You should check all of the MOSFETs in those circuits for short between the pin 1 and pin 2.

Kind Regards,
Josh
 

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