How to get CPU out?

[JRL]

There is a dead Quadra 610 on ebay that I'm willing to pull the CPU out (if I win the auction) for my LC 475, but how do I pull it out?

 

[tmtomh]

You need a small, flat blade screwdriver (like a jeweler's screwdriver), or else a chip-puller, or perhaps a small putty knife.

Carefully, and slowly, pry up the edges of the CPU from its socket - the CPU is the grey-purple ceramic bit, and the socket is the black plastic bit.

The trick is to work all the way around all four sides, being firm but gentle, doing it gradually. You want to avoid popping one side out violently, as that will bend the pins. They can be bent back, but it's a big PIA.

Best,

Matt

 

[Bunsen]

I've heard the the plastic tab on the side of a ball-point pen cap can work too, and isn't as potentially destructive as a metal part.

 

[Temetka]

I've never heard that Bunsen. Interesting.

I use one of the PCI slot covers. Nice thin and works great. Takes about 1-2 minutes to pull the CPU with all pins intact.

 

[dpatten]

I use the special tool that came with Intel 486 overdrive chips. It looks a bit like a rake. the pin spacing on '040 chips is very close to that of a 486.

When I'm not at home I also use pci/isa slot cover as a good field expedient removal tool for machines sitting in a dumpster or on the roadside.

 

[Charlieman]

When I'm not at home I also use pci/isa slot cover as a good field expedient removal tool for machines sitting in a dumpster or on the roadside.

And it works very well with larger socketed DIP packages too, as long as you work slowly.

 

[Quadraman]

I use the flat edge of a butter knife but you have to be careful not to pull one side up all at once or you'll end up with bent or broken pins. You have to pry up evenly on all sides.

 

[register]

The RC040 likes to be accompagnied by a heat sink, especially if you might do the 33 MHz hack on the 475. Some processors have the heat sink glued in place, some come with a removable heat sink fixture to be mounted when inserting the CPU into the socket. If you have to mount a heat sink, apply some thermal conductive paste/glue or thermal conductive adhesive on top of the CPU before seating the heat sink. In case you use electrical conductive paste, carefully avoid to produce shorts (which could come from some paste spread onto the mainboard).

Check clearance of heat sink to case and memory module _before_ glueing it in place ;-)

 

[bmacsys]

I use the flat edge of a butter knife but you have to be careful not to pull one side up all at once or you'll end up with bent or broken pins. You have to pry up evenly on all sides.

Yeah, the key is working out each side a little bit till you have it nearly all the way out. Then grab it on two sides and gently lift it up/