QUOTE(Locohead @ Sep 28 2009, 05:19 AM)
TBH I would get the 2nd screw&washer kit like I said and start again from scratch. Take both heatsinks off, maybe leave the board rest for a bit to let it reach equilibrium, and treat it like it's an RROD system and like you are starting out doing the x-clamp fix for the first time. I'll detail all the steps again, as I do them, to avoid any confusion:
- Remove motherboard from case, flip it over and also ground yourself to avoid any static charge
- CAREFULLY pry off the X-clamps with a screwdriver -- I use a "twist + pull" method to try to minimize any board gouging. Sometimes some of the clamps are stubborn, but just switch to a different leg. Don't use force or great amount of stress, just pry/wiggle them off gently. You could also cover up the underside of the board, I'm too lazy though...
- Clean and prepare both heatsinks and chips with specialized cleaner (I use Arcticlean #1 and #2) or maybe cheapskate cleaners would work OK too...
- Apply arctic silver (or other high-quality thermal paste) as thinly as possible while still getting complete coverage over the top of the chips. I scrape it on with a credit card to make it smooth and paper thin.
- Attach the heatsinks carefully, screwing down with minimal pressure -- just enough to "snug" them down and achieve full contact, but not tight. Also, try to make the screws equal in pressure at the end of each step. The heatsink-side of each screw should have a plastic & metal washer. The underside should just have the plastic washer (this makes it fit best IMO.)
- Put the board back into the case, don't screw it down. Attach DVD drive, RF unit, power and video cables. Leave the fans UNplugged.
- Turn on the unit (no fans!) Leave it on until you get 2 red blinking lights (overheat.) Time it for 2 minutes of overheat, then power down. Leave it alone for a few minutes, until the system is still warm but the heatsinks are no longer burning hot.
- Unhook and remove the board, NOW tighten the screws down the rest of the way. Do not overtighten, just firmly -- you shouldn't use any large amount of strength, just as much as you can do without using any real force. Again make sure all the screws have equal pressure.
- Hook everything back up (including fans and shroud), but don't screw down the board into the case yet. Test for green lights. If you don't get green lights, loosen the heatsinks to "snug" and go back to the overheat step, and overheat for longer (how long is up to you... I've never had to do more than 2 minutes so I can't give too much advice on that.) If you can't get green lights with this, it will require more complicated methods (heatgun or reball) that I have no experience with yet.
- Once you have green lights, you can screw down the mobo and reattach everything. I highly recommend doing the fan-shroud mod at this point before you reassemble your case again. It's such a cheap and effective way to improve cooling.
- When you reassemble your case, you won't be using the 8 little black screws that went into the x-clamps. Treat all of the case screws similar to the heatsink screws -- make them firm but don't use any large amount of strength, and tighten them as evenly as possible.
For most systems this should last you several months at least. Both of the ones I did (mine and a friends) are still going great anyway. Whenever I get 3ROD again (IMO it is inevitable for any 360) I'll go back to the loosen-heatsink and 2-minute overheat step, and proceed from there. I own a heatgun and it is standing by if needed, but I'd rather not risk it unless necessary. Well, good luck!
Thanks for the information. I think i will keep as it is and see how it gets. I beleive soon it will be more usual the RROD in the begining when that starts to be anoing i will do was you said...
Thank you very much for the detail steps.
Very nice. Thanks Complements.