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Witwolfy
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« on: June 12, 2009, 01:08:39 AM » |
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Okay after the 3rd time my xbox of 2 years decided to E74 on my ass once again i decided to open the damn thing up... And read up about this "Heat gun method".
1. removed the flat heatsink
2. Flipped to the back side of the board and heated the backside of the GPU and ANA chip for about 40 seconds at meduim setting.
3.Note! I did not replace the nuts,bolts,washers nor replace the thermal paste.
And i still get the E74 error afterwards.
Now my question is what am i doing wrong.. IS it a MUST that you replace the the washers ect with the thermal paste in order for your xbox to work again? thanks in advance
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Rehab IS For Quitters!!!
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Arakon
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« Reply #1 on: June 12, 2009, 02:12:26 AM » |
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Er.. for one, you absolutely have to replace the top too. second, you have to replace the thermal paste, and remove it BEFORE you heatgun. Chances are rather good you already burnt it into the chip when you overheated it like that. good luck getting it all off. that stuff isn't meant to handle temperatures THAT high.
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I do NOT give support by email, PM, ICQ or whatever. Anyone annoying me that way will have his balls removed. With a rusty butterknife. Slowly. And I'll enjoy doing it.
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Witwolfy
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« Reply #2 on: June 12, 2009, 03:53:06 AM » |
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No i can scrape it off easily not a problem. So if i repeat my steps and actaully apply new thermal paste it will work again? Or is it one of those 50/50 things
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Rehab IS For Quitters!!!
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itsfakemon
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« Reply #3 on: June 12, 2009, 04:50:05 AM » |
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wait, wasn't E74 a ram error??
edit: nvm, it's hsio error
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« Last Edit: June 12, 2009, 04:52:40 AM by itsfakemon »
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excuse me, I'm French...
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mushy408
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« Reply #4 on: June 12, 2009, 07:57:41 AM » |
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Sorry for sounding stupid, but I've seen HSIO mentioned a few times.
Is this the 'link' or 'bus' between the GPU & the Southbridge/ANA?
I've only seen E74 on HDMI consoles, which I always thought it was caused by bad connections under the ANA. My dad's xbox has a persistant E74, which I have fixed for a day or 2. I 'flooded' the ANA with flux and heated with my rework nozzle to freshen the connections.
The reason I thought that is because the newer HDMI consoles have epoxy around and on the corners of the CPU/GPU to hold it in place. So I always thought this would erradicate the 0102/0021/0022 problem, but evidently not...
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.ISO
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« Reply #5 on: June 12, 2009, 10:10:02 AM » |
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It's usually caused by ANA, and I've seen E74 plenty of times on pre-HDMI consoles
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you wish gigaturd, as if you even know how to tell the difference between a disassembler and your vagina
Gigabite: A fool who think he is always right, and talk about how useless others are when he is really addressing to himself. Gigabite agreeing with the statement: p.s nice comment in your sig
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bonzo pl
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« Reply #6 on: June 12, 2009, 03:43:15 PM » |
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.ISO
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« Reply #7 on: June 12, 2009, 05:11:49 PM » |
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No it's not
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« Last Edit: June 12, 2009, 08:08:34 PM by .ISO »
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you wish gigaturd, as if you even know how to tell the difference between a disassembler and your vagina
Gigabite: A fool who think he is always right, and talk about how useless others are when he is really addressing to himself. Gigabite agreeing with the statement: p.s nice comment in your sig
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Intersect
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« Reply #8 on: June 12, 2009, 06:47:52 PM » |
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E74 is the result of a failure in the kernel's Edram retraining function which is extremely ridiculously complex. There is a crc check, temperature readings, and a $#!tload of other things happening here. If you look at the GPU, the Edram is right there extremely close next to it, and connected by an HSIO bus. Why anything would go through the Ana Scaler chip during a function that trains the edram is beyond me, because it doesn't. Why would it do that when when the Edram is right next to the GPU. I'm not sure who started this whole thing about the scaler chip, but it's wrong.
The Scaler is actually initialized as part of the display fatal error function at the end right before the display gets turned on. So, no, it's not the Ana chip. If using a heat gun on the scaler chip alone did fix your e74, it's probably from bending the board or something.
1) retrain edram
2) do a bunch of checks
3) check the results of those for a failure
4) if there was a failure, load error code and branch to display fatal error
5) initialize scaler<--
6) turn display on
E73 is also Edram related, the result of a failure to configure the hsio bus. But why not just heat gun the $#!t out of dvd drive to fix it ?
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« Last Edit: June 12, 2009, 06:49:45 PM by Intersect »
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bunghoolio
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« Reply #9 on: June 12, 2009, 08:25:29 PM » |
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I had a machine thant worked after heatfix CPU and GPU. Replace thermal paste. Re-use standard xclamps. When I put it all back together, it did E74. (I used all the screws) So I took it apart again and had just the heat sinks and power switch connected (no case, no metal shell, just mainboard) powered it on and it booted, no E74.) So I decided to try put it all back together with all the screws except for the 8 small black screws that holds the GPU and CPU xclamps. Works a charm for now. Strange??
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« Last Edit: June 12, 2009, 08:29:09 PM by bunghoolio »
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mushy408
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« Reply #10 on: June 13, 2009, 02:02:23 PM » |
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Definitley sounds like the PCB is flexing.
I have a pre-HDMI console that has 0022 then 0102 depending on how I flex the board. I've noticed that it had already been back to M$ for repairs due to the epoxy. I've scraped the epoxy away with a scalpel and am just about to rework the GPU.
Just looking at it now, I can see where the previous owner has x-clamped it and the board & GPU is permanently flexed. Even if I manage to reflow the GPU, the chip itself is slightly curved.
I can see this giving me problems... GPUs can be exchanged right? Only the CPU & Flash are paired?
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AnonymousV2
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« Reply #11 on: June 16, 2009, 11:39:08 AM » |
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Definitley sounds like the PCB is flexing.
I have a pre-HDMI console that has 0022 then 0102 depending on how I flex the board. I've noticed that it had already been back to M$ for repairs due to the epoxy. I've scraped the epoxy away with a scalpel and am just about to rework the GPU.
Just looking at it now, I can see where the previous owner has x-clamped it and the board & GPU is permanently flexed. Even if I manage to reflow the GPU, the chip itself is slightly curved.
I can see this giving me problems... GPUs can be exchanged right? Only the CPU & Flash are paired?
Do you mean that the GPU is curved or that it is sitting on the board crooked? Neither of those secondary error codes are GPU malfunction. It sounds like the previous owner didn't screw in the heatsink properly and the board got warped or caused some kind of solder break somewhere else. You can try reheating the GPU and while it's hot, tightening the heatsink down tight. When you get a GPU malfunction error, that's when you know for sure you need to replace the GPU (seen it happen a few times) |
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Intersect
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« Reply #12 on: June 16, 2009, 12:25:38 PM » |
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You can't rule out gpu malfunction on anything that low unless you've reversed the boot code.
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Witwolfy
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« Reply #13 on: June 17, 2009, 09:17:52 AM » |
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Thats the weird thing I dont have a HDMI xbox, i have like a late 2007 model... I replaced the thermal paste and all that jazz, and the thing still gave me the E74 error. Even after all that effort i tried doing the towel trick but didnt seem to to work either. Before my 3rd E74 i took it in for repairs and it looks like the guy removed my x clamps completely. So i guess he did the xclamp removal fix....
I gave up eventaully...saving up for a new xbox. something must of blown else where. cause i did pre heat the board on several occasions and it still gave me a E74 error. Who can actaully tell me how long i should heat the board up.. maybe im not makng the soldering melt enough
The sad thing is, I resprayed my cover a nice black to make it look spiffy and all, just to find out that I cant even repair the fault lol
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« Last Edit: June 17, 2009, 09:28:11 AM by Witwolfy »
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Rehab IS For Quitters!!!
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.ISO
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« Reply #14 on: June 17, 2009, 10:23:58 AM » |
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E74 CAN actually indicates hardware failure, and not as in solder connections, but actual compoents eletronically destroyed. If you have a "unfixable" one (Which I have experianced before), your only hope is to send it back to microsoft, and get a replacement console.(IF you can't repair it, neither can they.)
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you wish gigaturd, as if you even know how to tell the difference between a disassembler and your vagina
Gigabite: A fool who think he is always right, and talk about how useless others are when he is really addressing to himself. Gigabite agreeing with the statement: p.s nice comment in your sig
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Witwolfy
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« Reply #15 on: June 17, 2009, 02:41:59 PM » |
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ha thats a good idea. Here take my modded console, give me a new one. I'll just get a new one
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Rehab IS For Quitters!!!
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.ISO
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« Reply #16 on: June 17, 2009, 04:36:25 PM » |
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only if you pay the shipping  |
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you wish gigaturd, as if you even know how to tell the difference between a disassembler and your vagina
Gigabite: A fool who think he is always right, and talk about how useless others are when he is really addressing to himself. Gigabite agreeing with the statement: p.s nice comment in your sig
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a4htec
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« Reply #17 on: June 21, 2009, 01:14:38 PM » |
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Witwolfy
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« Reply #18 on: July 06, 2009, 06:27:20 AM » |
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Thanks ill try it.. I just think my Xbox is dead to begin with... because now that i think about it... I remember after my 2nd towel trick method i heard i slight crack.... So who knows maybe i blew a precious resistor or something ... Damn towel trick .. Should of done the heat gun method from the start
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Rehab IS For Quitters!!!
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shivshan
Newbie
Posts: 9
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« Reply #19 on: July 08, 2009, 08:10:14 PM » |
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this really works i tried it. |
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