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MacBook Pro 15 Core Duo Model A1150 my MacBook pro A1150 start shutting off without warning, i procceded to replaced both fans because they were not running , after replacing the fans now the fans are working great but my computer still doing the same thing. i will like to know if by changing the heat sink i also may need to replaced the heat sensor? please i just need to be guide to the right direction on this problems. i am about to get deploy to Afghanistan next month for my 3rd tour i my son is in need of this computer . the only computer that we own.thank you for your help. HM1 MARTINEZ USN RECON BLT Bravo company

Dear Corpsman, you came to the right place. If we can’t find a quick solution for you that you can handle, just click on my icon, email me and send me your Stateside shipping address. I will FedEx you a shipping box. I would consider it a honor to repair your Book and set up the software for your son. While you are away he may contact me with any problem I can help him with at no charge. Meanwhile, can you give me a better description of when your machine is shutting off. Feel the bottom and see if you are getting any hot spots. I have the 2.0 version of this Book. When mine starting getting hot I removed the logic board and found that my vent ports were 70% blocked thus preventing proper cooling. I cleaned the ports and the fans and replaced the thermal paste and have had no further problems. This is an involved procedure so if you’re reticent about doing it, I am happy to provide service to you as you do to my country. See step 29 of this guide for the heat sink and vents: MacBook Pro 15" Core Duo Model A1150 Lower Case Replacement Here’s a guide on replacing the thermal paste: How to Apply Thermal Paste

If you took off the heatsinks you need to re-apply thermal paste, which I would do anyways (I’ve heard great things about Artic Silver 5). I would make sure all the wires insode are all securely connected and you’re not accidentally blocking the vents

Mayer did you ever figure this one out? I have the same notebook with the same issues it starts and then shuts down randomly. Sometimes it quits during startup sometimes 20-30-120mins later… Id love to revive my MBP. Someone mentioned to me it may be the pram battery or maybe the logic board? By the way, I have been in the Air Force for 13 years (started out enlisted, recently got commissioned) and I think your offer to CANDIDO and his son is really really great! I wanted to say thank you for offering your help to him and his family from a fellow service member. Thanks again for any info you could provide 2nd LT Eric Krispin