First mobo change so far....not so good

[Terry]

I have a dead motherboard. I got the replacement today.
The first problem is that when I removed the CPU fan from the old mobo
it came off chip and all.

The chip is bonded to the heat sink. Any suggestions on how to free
it?

 

[Mac Cool]

Terry:

The chip is bonded to the heat sink. Any suggestions on how to free
it?

I've read of people putting them in the freezer making the glue brittle
then just snap or twist them apart.

 

[Adam Strawson]

I've read of people putting them in the freezer making the glue brittle
then just snap or twist them apart.

I would go the other way, use a hair-dryer to warm it up and to soften the
bond.

Adam S

 

[Terry]

I would go the other way, use a hair-dryer to warm it up and to soften the
bond.

Adam S

I took a heat pad and left it on for about 2 hours. (I went to sleep)
Came right off.

 

[ProfGene]

I have a dead motherboard. I got the replacement today.
The first problem is that when I removed the CPU fan from the old mobo
it came off chip and all.

The chip is bonded to the heat sink. Any suggestions on how to free
it?

That should not have happened because there is a lever that releases the
CPU which should have prevented the chip from coming off with the fan
unless you pulled it up. The only thing that should bond it would be the
thermal paste that is between the fan and the chip which is sort of
sticky so you should be able to pry it loose without much pulling. If
you can't do this you could try putting the chip and fan on together but
there is a danger that the thermal material somehow is no good since it
should not bond enough to be be stuck permanently.

 

[sillyputty]

That should not have happened because there is a lever that releases the
CPU which should have prevented the chip from coming off with the fan
unless you pulled it up. The only thing that should bond it would be the
thermal paste that is between the fan and the chip which is sort of
sticky so you should be able to pry it loose without much pulling. If
you can't do this you could try putting the chip and fan on together but
there is a danger that the thermal material somehow is no good since it
should not bond enough to be be stuck permanently.

The bond between the CPU and heatsink can be very tough to break; the
heat probably contributes. I had a heatsink/fan that was so large that
I couldn't get to the damn release lever and had no choice but to pull
the CPU out of the socket, though the system worked fine after putting
it back together. Last time I buy something that large! Haven't tried
the hairdryer thing. I've patiently twisted the heatsink and CPU back
and forth while gently pulling them apart until they separated.