got E74 all the time

[Mason]

Hi,

i fixed my xbox with xclamp mod from e74 -> works.
After 5 days the xbox is not powered on i get e74 again.
i fixed it using headgun -> works.
but after a few days the xbox is not powered on -> e74.

Whats wrong?
When i fixed it i can play 20hours a day without probs. every day. but if it stands for a while -> E74

plz help

[ReverseAffect]

well when you heated it up you could of just caused a temp bandage cure..
a cold solder problem or a loose solder ball problem....

now when it cools back off the cold solder or the solderball problem comes back,
because it wasn't heated up enough to mend it permanently..

most think that they heat the area up enough but don't....(use a digital temp gun)..

are the xclamp bolts/screws causing the mobo to bow up in the middle from them,
hitting on the bottom metal casing because of the board being screwed down?

how did you heat up the board? steps of using your heat gun, circles?
did you apply clean flux as you did it? what was the temp?

when you did your heatup was the board screwed in without the heatsinks,
(better way to keep it from bowing during a heatup and cool down?
(cheapest way,besides building a frame to support it).

was the board out of the case and then you did your heatup...
if this was the case,then as you heated it up it bowed a bit, caused a connection,
and then when you screwed the mobo back down it straightened out and caused,
a loose connection again...

2 major things keep the mobo straight...
and use enough heat/clean flux.......not heating up 1 area to long...

also you might have a cap going dry/bad .... stay's charged while the x360 is running and then dies/shorts from being off

is it jtagged? is the DB1F1 point shorting to the ground?

 

[Mason]

thx for reply,

no its not jtagged, its the console from my brother (dash 8955) , e74 comes from a bad videocable i think cause his 2nd xbox got it too. (its a 3rd manufactor vga-cable)
i use the headgun without the mobo in case and without gpu cooler (http://i.ytimg.com/vi/j-Eyz0sOKR4/0.jpg) <- like this .
when i unplug the fan from gpu and let it overheat and cool down it works.
the problem is that the xbox only got e74 if i not play every day. takes about 5days without playing to get e74.
if i play every day it runs perfect.

[Gazcoigne]

why are you overheating it as well as heatgunning it?

overheating is not a solution, it will damage the board and GPU more than it will do any good.

get some liquid flux and a syringe with needle and inject the flux under the GPU then reflow it correctly with heatgun.

[Mason]

ok thanks i will try this...