Classic Mac Hardware (Troubleshooting, Upgrading, & Modifying) > Mac CPU Upgrades

sonnet 1.33 os9 troubles [no original cpu]

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perestroika:

--- Quote from: robespierre on March 14, 2022, 10:14:39 PM ---The SMD electrolytics are a pain to rework because the pins are exposed by such a small stickout. No matter how small and narrow your tip, you will burn the plastic base trying to touch the pin. So you need special techniques like hot air rework with solder preforms. It's a pain to remove them also: very easy to pull the copper pads off the board. It's doable, just a lot harder than it looks.

--- End quote ---

 :'(

FBz:
“…i have no soldering skills…”

Where DO such skills come from?

And yes... sounds pretty complicated, difficult, scary and oh-so-serious.

If the seller won’t take it back… and or replace it. I’d have no qualms about giving it a go. It’s an outside corner capacitor on a 733 MHz Quicksilver CPU daughtercard. Easy access. AND there’s considerable room to approach it and attempt soldering. IF that blue arrow (pic above) shows a small tab that can be carefully bent back with small hemostats - or even very small needle-nosed pliers… well?

AND even if that tab (“keeper”) were accidentally broken off in the effort, there seems ample space to allow a quick spot of solder there. My biggest concern would be… not breaking off the other leg on the opposite side when applying pressure to hold the cap down and its’ loose connection back in place for soldering.

Mind you, I wouldn’t attempt this with a big-tipped soldering Gun… but have done many similar repairs over the years, just like this… with a Weller soldering iron & tip - just like the one pictured on the right in the image below. [The smaller Hakko (on the left) is better suited for such a task.]



It is close (and would be) delicate work. So best to be fresh and calm before proceeding. AND have a good, hands-free magnifier to view the spot as you work.

Again, it’s a 733 MHz that’s only needed very briefly in order to re-install a Sonnet processor upgrade.
(And there’s still plenty of low-cost 733 CPUs out there anyway.)

I'd say damn the torpedoes and full-speed ahead… for such an overall small concern.
Good practice, even if it doesn’t work.

Maybe seller will first replace / refund anyway. ;)

perestroika:

--- Quote from: FBz on March 15, 2022, 05:45:03 PM ---“…i have no soldering skills…”

Where DO such skills come from?

And yes... sounds pretty complicated, difficult, scary and oh-so-serious.

If the seller won’t take it back… and or replace it. I’d have no qualms about giving it a go. It’s an outside corner capacitor on a 733 MHz Quicksilver CPU daughtercard. Easy access. AND there’s considerable room to approach it and attempt soldering. IF that blue arrow (pic above) shows a small tab that can be carefully bent back with small hemostats - or even very small needle-nosed pliers… well?

AND even if that tab (“keeper”) were accidentally broken off in the effort, there seems ample space to allow a quick spot of solder there. My biggest concern would be… not breaking off the other leg on the opposite side when applying pressure to hold the cap down and its’ loose connection back in place for soldering.

Mind you, I wouldn’t attempt this with a big-tipped soldering Gun… but have done many similar repairs over the years, just like this… with a Weller soldering iron & tip - just like the one pictured on the right in the image below. [The smaller Hakko (on the left) is better suited for such a task.]



It is close (and would be) delicate work. So best to be fresh and calm before proceeding. AND have a good, hands-free magnifier to view the spot as you work.

Again, it’s a 733 MHz that’s only needed very briefly in order to re-install a Sonnet processor upgrade.
(And there’s still plenty of low-cost 733 CPUs out there anyway.)

I'd say damn the torpedoes and full-speed ahead… for such an overall small concern.
Good practice, even if it doesn’t work.

Maybe seller will first replace / refund anyway. ;)

--- End quote ---

got my soldering iron on saturday and since then kept putting it off until today, and after i dont know, 10mins total between soldering, burning myself, and inserting the cpu into the motherboard - i turned on the quicksilver and after a long gray screen, it booted into os9 and it just worked! :O

and then i burned myself again picking up the soldering iron by the tip. lol.

seller never answered but i'll keep it though, you never know when it might come in handy. so far the quicksilver with that apple cpu system file i got from the macintoshgarden works without drama. until it starts being a drama queen then i'll do the whole reset thing. thanks again FBz!

FBz:
Sorry, I neglected to mention that the soldering iron
…(and solder) can be quite hot.     CAUTION!

You don’t run with scissors too, do you?

Glad you got it working! ;)

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