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has a bunch of troubleshooting info

Try reflashing your jtag back to the last working updflash.bin file if not its a hardware failure

You siad at first it was e74, but then reposted to say it was e76.

Here is some info on e76:

Known fixes:
1) Replace the Networkchip
2) Connect the DVD-drive and check if the error code is still the same...
3) Remove everything you might have soldered to this area.
4) Reflow the Southbridge and Networkchip ...

Description:
This error is caused by a dead network chip.This can happen when a lightning hits your house and the network chip is under high voltage.
According to XBH: Couldn't complete ethernet reset



If it was infact e74 which is a much more common fault here is some information:

Known fixes:
1)If you soldered anything to the mainboard before it occured, whatever you are powering from this point is drawing too much power so get rid of it.Also get rid of everything that you can see that might bridge anything near the GPU.
2) X-Clamp replacement Hybrid - Tighten the GPU screws facing the HANA chip slightly more and make sure to be using a shim
2) X-Clamp replacement Hybrid - Tighten the GPU screws facing the HANA chip slightly more and make sure to be using a shim. Adding an extra shim on each side of the smaller chip dye will help to create more surface against the heatsink and will increase the chances of the error going away for good.
3) If there is a lot of flexing under the GPU, bake the board to unflex it
4) Reflowing GPU and HANA chip

Related Errors:
0022

Description:
This error is caused by a cold solder joint under the GPU, (H)ANA-chip or in between.
Mostly it is one of the outer solder balls on the side facing the (H)ANA chip so a shim increases the chanced of success quite a bit.
Can also be a component that is missing or damaged so look for missing parts near the GPU and the (H)ANA chip.

References:
JBBrack - Extra shim, smaller chip dye

towel trick
worked for me

got a xexon jtag error 74

you should look it up on youtube

dont use a heat gun unless ya know what you are doing you will fk it up even worse if done wrong

natedogg1 wrote 1 rrod on jtag were e74 error is supposed to be at.......


some body plz help

u will get in for free if the problem is solved by u......

my youtube has the problem video


ratingnate is my channel

go to craigslist and type in xbox 360 someone should be able to fx it there

If this ever happens to my JTAG i will die my hair red.

natedogg1 wrote 1 rrod light

is e76 error how do u fix that

plz help
........

im not sure but i think you need to reflash it?

that sucks