well I would not worry about external power(5V power source not from xbox motherboard) just yet. Start By disconnecting the 5V(I would remove all wires if 5V doesnt do the trick) from R-Jtag. Test demon functionallity. Ie. boot demon nand(Wont Successfully boot without R-Jtag attached), turn off, switch nands, see if stock boots normally. If it does then i would try an external 5v power source for R-JTAG board.(Dont forget to solder the gnd wire off new power source to av port and 5V to the rjtag, or it wont work.
R-jtag install complete, RROD when back in its case!
- Thread starter Morgiee101
- Start date
Martin C
VIP Member
As stated, it's what *I* would do.
If I were you I'd just disconnect the 5v wire from the R-JTAG for the time being. Worry about external power later.
If I were you I'd just disconnect the 5v wire from the R-JTAG for the time being. Worry about external power later.
Scrufdog
VIP Member
Out if curiosity, how would an external source help? Cut down interference or something? Of are you thinking the rjtag is keeping things from resetting due to capacitance?
Martin C
VIP Member
Well, since folk are convinced the R-JTAG is affecting the functionality of the Demon, it would eliminate it being the issue. A different power source means it's not using the same voltage rail as the Demon.
Scrufdog
VIP Member
Martin C
VIP Member
I've been informed that you should be able to power the R-JTAG (for testing) using the programming header connector on the J-R Programmer.
Desolder the 5v wire from the console first though.
Desolder the 5v wire from the console first though.
Ok results are in here is what i have done.
De soldered the 5v wire from the R-Jtag and left nand images as they were (glitch on the demon, stock on the stock nand) booted the console first in demon mode and the jtag is trying to glitch (glitch sound from fan) but no green light flashes. After 5 min console still doesn't glitch probs due to not having 5v connected. powered off, switched nand (now on stock nand) and booted console i still got instant RROD and same code 0020.
Test 2:
from an external molex power supply i re soldered the red 5v wire back to the R-jtag and de soldered the other end off the motherboard and inserted it into the 5v pin from the external supply. The ground wire i left on the jtag and de soldered the other end from the motherboard and soldered it to one of the earth feet on the AV connector port. I then soldered another wire (same grade as earth lead) from the same av connector earth feet point and inserted it into the ground pin on the external power psu. The r-jtag power light re appeared and re connected console psu.
First i attempted to boot in demon mode again and after about 2 mins of glitching it booted no problem. Waited until FSD had fully opened and powered of console. Once off i then switched nands (back to xbox nand now stock) and powered up the console and yet again instant RROD code 0020.
Hope this helps
De soldered the 5v wire from the R-Jtag and left nand images as they were (glitch on the demon, stock on the stock nand) booted the console first in demon mode and the jtag is trying to glitch (glitch sound from fan) but no green light flashes. After 5 min console still doesn't glitch probs due to not having 5v connected. powered off, switched nand (now on stock nand) and booted console i still got instant RROD and same code 0020.
Test 2:
from an external molex power supply i re soldered the red 5v wire back to the R-jtag and de soldered the other end off the motherboard and inserted it into the 5v pin from the external supply. The ground wire i left on the jtag and de soldered the other end from the motherboard and soldered it to one of the earth feet on the AV connector port. I then soldered another wire (same grade as earth lead) from the same av connector earth feet point and inserted it into the ground pin on the external power psu. The r-jtag power light re appeared and re connected console psu.
First i attempted to boot in demon mode again and after about 2 mins of glitching it booted no problem. Waited until FSD had fully opened and powered of console. Once off i then switched nands (back to xbox nand now stock) and powered up the console and yet again instant RROD code 0020.
Hope this helps
Did you try disconnecting the r-jtag completely? Just working a hunch here. considering that in a previous post you said that your demon worked perfect with RGH2.
Did this now and still same outcome.
Martin C: i connected the j programmer via usb to power it up tested all header points and all points on the board and the highest voltage my multimeter read was 5.75 v off one resistor, stuck with using external psu as it was constant 5v.
Martin C: i connected the j programmer via usb to power it up tested all header points and all points on the board and the highest voltage my multimeter read was 5.75 v off one resistor, stuck with using external psu as it was constant 5v.
well i guess that disproves that idea. thanks for testing...... seems weird that it would work fine with rgh2 but not r-jtag.
Martin C
VIP Member
My reason for thinking it might have something to do with r-jtag!
Ok I accept it, But until it was rulled out then it could have been an issue.
The question still remains why when installing the R-jtag to the console along with the demon on Falcons does it refuse and effect booting of stock despite the wiring being exactly the same as any other phat console. It may not be the R-jtag but it seems strange that when the coolrunner 3 lite with rgh2 was installed ignoring the horrible long boot times it worked perfect with both stock and demon, its only since the r-jtag was installed in place of the coolrunner did it cause issues. Any why is it that when switching nands when booted up does this seem to be the only thing that cures the issue? Is it that during the switching their is a certain raise or drop in voltage which is enough to reset the smc were the r-jtag has not got that ability or enough power to do that job? These are just suggestions but i do believe it worth not ignoring the issue or brush it under the carpet and more test need to be done im sure the answer will fall into it being an adjustment in settings with the smc on falcons only or adding an additional ground/5v to the r-jtag or something.
For the time being now i know i can successfully boot both nands with no issue by doing the switch method i will stick with that and keep my eye out for any feedback,tests or improvements made on this issue.
For the time being now i know i can successfully boot both nands with no issue by doing the switch method i will stick with that and keep my eye out for any feedback,tests or improvements made on this issue.
DoPeSuN
Full Member
- Aug 20, 2010
- 70
- 0
Ive had this exact issue with the console booting to demon nand fine.. but stock nand in console giving instant rrod.. 2 different consoles..
the work around already stated worked fine for me.. demon on.. press power button.. immediately press demon nand switcher button.. power on console.. retail nand boots fine..
Both using the r-jtag chip.
I also find it a bit kooky that multiple users have this same issue..
I would really love to see a pro installer of martins calibre get one of these consoles and check it out so some of us dont feel like we r going crazy..
Thanks for listening..
the work around already stated worked fine for me.. demon on.. press power button.. immediately press demon nand switcher button.. power on console.. retail nand boots fine..
Both using the r-jtag chip.
I also find it a bit kooky that multiple users have this same issue..
I would really love to see a pro installer of martins calibre get one of these consoles and check it out so some of us dont feel like we r going crazy..
Thanks for listening..
on a side note I havnt found a definitive reason for 0020 error(Every thing from ram to gpu/cpu reball, Though most say this has something to do with GPU), and since it will work fine with stock, if u use the trick already mentioned. the only other thing i can think of that would make this happen is the jtag wiring.
I don't think that the r-tjag or demon is to blame.
The title of this thread is "R-jtag install complete, RROD when back in its case!"
Probably there is some damage done to the motherboard or demon whilst squeezing board back in the case?
The title of this thread is "R-jtag install complete, RROD when back in its case!"
Probably there is some damage done to the motherboard or demon whilst squeezing board back in the case?
Op can you try and put an insulating layer between the board and the shell? you could possibly have a small ball of solder somewhere on the bottom side of the board grounding out when its back in the shell. Have you thuroughly inspected the board for any solder that dose not belong?