Hi,

i have a Xenon board, stock GPU gave me E74 after reball so i've replaced it with working one. I've tried to rework old GPU couple of times and i think that electrolytic capacitors in power circuit were given a hard time.

Now the console sometimes gave me 0020 when powered on, after couple of tries it goes green and it's working ok. One time after four hours of playing screen goes pixelated and the box hangs. After reboot it was working ok.

I think that this problems can be caused by those capacitors, can anyone of you guys can confirm that?

0020 - is usually associated with the heatsinks

Possible problems: Too tight... too loose... not spaced properly from the Mobo ... too much paste compound/ too little paste. If you have large screw heads that are pushing up from under the MObo. Bad - placing bending tension.

But you may also have a more complex situation that is developing. The pins on your 'new GPU' might be lifting from off the motherboard. It may have not been anchored well the first time.

Would suggest doing the Reball all over again. You can do the Reflow... but if it was me - i'd do the reball again

Did you do your reball ?

I have stock cooling in that box, without screwes from tank so i don't think it's a problem with the heatsinks.

I've reballed stock gpu about four times because it has E74 after rework every time and i was thinking that the GPU didn't sit properly - my bad i know. The GPU was bad and when i've changed it with other one console came back to life.

After those five reworks and board heatings one or two caps looks little puffed so i thought it may be the problem. I don't want to rework that GPU next time, unless it is really necessary.

I've read that 0020 can be power related, so i thought that GPU isn't getting enough power cause of this caps and simply not initiate properly. What do you think about this?

Another thing - when console gave me E74 i tried to rework the ANA chip with soldering iron, maybe some of the legs have cold solder joint? Can problems with ANA give 0020?

sigh

E74 is when the EDRAM on the GPU die is faulty, reballing the same faulty chip is doing no good and you have probably damaged pads underneath the GPU by reballing it so many times, hence the picellation etc.

brand new GPU's are easily sourced and cheap, buy a new one and fit it in, but TBH prob a waste of time if you have messed up the pads under the GPU.

E74 has nothing to do with the BGA connections under the chip, it is the EDRAM dying a horrible death.

Thanks for your reply,

pads are OK, i've already fitted new GPU and it's no E74 no more. Now the console is working but sometimes it gets 0020 when powered on. It happened two times per let's say twenty power ons.

Please read my previous posts carefully cause it seems like you didn't understood what i wanted to say

apologies [facepalm!]

after ive read it i see you have swollen caps. they will most likely need replaced, the GPU or CPU isnt getting "clean" power.

if you can reball that shouldnt be a problem for you.

your suspicions on the ANA might also be a cause if its got a cold solder joint etc

but i would definately stop reflowing/reballing the GPU, you have sorted that problem already, and the console wouldnt boot at all if there was bad connecitons on the BGA.

0020 can also be that the solder was not melted properly thus giving that code

you will get a 0020 with no gpu so thats why it makes sense

Two days ago i've changed all 2200uF 6,3V caps, since then console is working great but it's too early to say it's 100% stable. I hope it is

I will back up and correct myself a little bit

The E74 - the HANA chip

Just did a reball on the HANA chip for scene member ( juvix8888 ) ... that ball grid uses 225 solder balls, by the way

The E 74 is gone. So E74 - primarily issues with the HANA. Secondarily can be the GPU connections that lead to the HANA

RAM chips are a different error code - 0110

i said EDRAM not RAM

this has been confirmed by many experts on this forum.

you are comparing apples and oranges here m8.

yes, you did - my fault ... skimmed thru the reading too much

e74 and e73 can both be fixed by hana or gpu, most of the time its gpu related

0020 can be power related as he mentioned he fixed it with cap replacements, shorts can also cause it

either component shorts or bga related shorts