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I recently 'repaired' my lenovo workstation laptop. Mostly quiet when new it was running fans almost constantly and hitting thermal limit from web browsing.
Initially had it opened and cleaned out fans and heatsinks (it was actually pretty clean) but problem persisted. Replaced entire 'heat sink assembly' including fans and machine is now like new. I suspect the heat pipe was broken from rough handling.
New assembly was $100, install was quite involved and cost < $80. Well worth it if it lets me delay getting a new laptop for another year or so.
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