Hittat på en holländskt forum. Ganska långt men det förklarar det hela (Fick idag tillbaka min MB där man bytt till nya kylflänsen, art nr 076-1243. det går som en klocka nu!
I took the liberty of re-posting this article.
It is the most important piece of information I have seen yet on Random Shutdown.
It was posted last night, yet for all those arguing and whining about RSD, there were only 17 replies to it.
If it's legit, and the writer would have to be pretty good if it isn't, it shows that the logic board is NOT required to fix RSD and that Apple apparently has a new heatsink that does fix it. That would be unbelievably good news for all MacBook owners and prospective purchasers.
One person replied to the post last night saying he confirmed this information with Apple as such "The problem has nothing to due with heat. The problem is the heatsink was placed too close to some metal parts. Overtime the heatsink shifts and makes contact with the top metal of the MacBook case. That causes a short and the MacBook shuts off. The new heatsink is slightly shorter, preventing that contact."
It will be interesting to see if replacements using the heatsink part number listed below fix the problem for good.
Anyway, here it is.....
This is a News Article available only for Service Providers:
MacBook Intermittent Shutdown Issue: Revised Part Order and Repair Instructions
Applies to Technical News
For MacBooks exhibiting intermittent shutdown, previously released documentation directed Apple service providers to replace the main logic board (MLB) and heatsink. After further investigation, Apple has determined that only the heatsink needs to be replaced in MacBooks exhibiting intermittent shutdown.
To support service providers in updating repairs affected by the revised part instructions, and effective immediately, Apple will review and update (as necessary) all repairs in which a MacBook logic board/heatsink combo part is on backorder. See complete details about order review below.
Apple will only be reviewing and updating (as necessary) those MacBook repairs placed prior to the publication of this message. As a reminder for all future repairs, it is critical that notes clearly describing a product's issue(s) be entered into the GSX 'Notes' field for every repair.
See the Knowledge Base document MacBook: Shuts down intermittently for more details about the issue.
Review of MacBook logic board/heatsink combo part orders
Effective immediately, Apple will review and update or cancel (if necessary) repairs with a backordered logic board/heatsink combo part based upon the following scenarios:
Current repair notes indicate intermittent shut down issue
If a logic board/heatsink combo part is included as part of a submitted repair and the repair Notes section in GSX clearly indicates the combo part was ordered to resolve a MacBook intermittent shutdown issue, Apple will update the order by substituting the heatsink kit for the logic board/heatsink combo part.
Current repair notes indicate logic board issue
If a logic board/heatsink combo part is included as part of a submitted repair and the repair Notes section in GSX clearly indicates the combo part was ordered to resolve an issue associated with a logic board function, the repair will remain as submitted.
Note: You will always receive a logic board/heatsink combo part to replace a non-functioning logic board.
Repair and order cancellations
Apple will only cancel orders for MacBook logic board/heatsink combo parts in the following instances:
If the logic board/heatsink combo part is the only part ordered on the repair and the repair Notes section in GSX does not clearly indicate whether the combo part was ordered to resolve a MacBook intermittent shutdown issue or to resolve an issue associated with a logic board function, the entire repair will be canceled and you should re-submit the repair and order the correct part (either the logic board/heatsink combo part or the heatsink only, depending upon the issue).
If the logic board/heatsink combo part is one of multiple parts ordered for a repair and the repair Notes section in GSX does not clearly indicate whether the combo part was ordered to resolve a MacBook intermittent shutdown issue or to resolve an issue associated with a logic board function, Apple will cancel the logic board/heatsink combo part from the order. You should then order the correct part (either the logic board/heatsink combo part or the heatsink only, depending upon the issue) for that repair.
Important: It is not necessary to do anything with your MacBook repairs unless your order for a logic board/heatsink combo part has been canceled.
The new heatsink part is now available for order in GSX and should ship later this week:
076-1243 Heatsink Kit, with Sponge, 1.0 mm Conn
The MacBook (13-inch) Service Manual has been updated with this information and is available via links on AppleCare Service Source.
