A1181 coreduo => core2duo upgrade cpu

[drdyzio]

so i have a working logic board out of my macbook a1181 2.0 DualCore Intel
and i got this board i got of ebay that looks exactly the same except it has a core 2 duo 2.0 4mb of cache isntead of 2mb. now ive heard someone trying of doing this saying you have to replace the efi bios or whatnot. Anybody thinks this is possible with rework equipment of course.

the ebay board is faulty apparently but havent tested it yet. because keyboard needs fixing for the power button to work.

i wander if i just pop the c2d out and reball it and stick it on the working one.

just a project idea. i also wanna paint the thing purple for my misses.


Thanks

[drdyzio]

Re: A1181 coreduo => core2duo upgrade cpu

[stj]

Re: A1181 coreduo => core2duo upgrade cpu

i would say you *always* want the latest bios when doing a cpu upgrade - specially intel.
if you can swap the cpu, why not also swap the bios - if it wont boot first of course.

btw, is this one of those aluminium-case jobs??
because if it is - i hope the new cpu has a lower W rating - those things run so hot you can iron your shirt with one!

[dellxps15]

Re: A1181 coreduo => core2duo upgrade cpu

http://www.cpu-world.com/Compare/843...cket_M%29.html

i dont see that big difference..... only 15-20% on a low cpu aint so much.

generally to power a mac without a keyboard you have to short g3hot .

dunno on this board where the 2 pins are located.

[drdyzio]

Re: A1181 coreduo => core2duo upgrade cpu

ill try that
the fan temp sensors heve different connectors so gotta solder them on since i only have one heatsink/fan

thanks is it same pin on the black and white macbooks? thats the case we are dealing with.

thanks for your contributions.

[drdyzio]

Re: A1181 coreduo => core2duo upgrade cpu

it might not be worth the effort. if it was the 2.4 then maybe.

[drdyzio]

Re: A1181 coreduo => core2duo upgrade cpu

so i replaced a cpu in the mac, wanted a challenge and now i got one lol.

so the reballing / flowing went well, except some micro caps moved around a bit but got them to sit good again.

i plug ac in and smoke comes from underneath. Turned it around and this weird looking cap idk what type of cap it is, or even if its a cap.


<=-*1

at that time i noticed some micro cap mofos that came off a bit, i really gotta take more care and not tape up tings that dnt need taping up, it was shorting something probably so luckily i got a spare 1181 mobo lying around to match and compare stuff. so fixed the mini caps, and replaced the bigger lookin cap *1.

So replaced that

then re plugged it in, another one starts smoking.

replaced that,

then another one started smoking.

then i replaced that and no more smoke.

now when i try to turn it on fan gives off a slightest little nudge and the hard drive powers on

however the cpu / gpu / nortbridge area not even warm.

when i hold the power button again it turns off the hdd.

NOW

Questions

1. Did anyone ever experience this sort of blown caps smoking and one after another. After reball process?
im thinking since i moved my tc up away from my heating element on puhui it gets really hot underneath, i might have killed off some caps.

2. What do you guys i recommend do next. ?

i replaced the core duo with a core 2 duo.

3. Is my reballing not yet up to par?

thanks guys hope you will give me some insight.

I was going to reflow
the current setup just to make sure the balls have joined up well, im a bit skeptical i did that right.

as my first step.. and if that didnt work i was going to put back the old cpu back on and see if get any joy.

i mean i got 2 mobos i must make 1 work..... i need the practice and extra experience since got no work atm.

so im just on this atm.

getting flyers in next couple of days hopefully get some business wid them

sorry for rambling....


thanks in advance

[stj]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

i think that's a polymer cap.

was it near the cpu with a bunch of others?

you need to find the vrm circuit & see if a fet is shorted.

[loser18]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

lol...the CPU's got some pinouts/signals different I think...Did You check the datasheet???
Also the core 2 duo one is compatible only with Mobile Intel 945PM...

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu







i hope this explains a bit

[dellxps15]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

near the cpu there are these 2 coils. check if they are shorted. and if not when u power on check voltage coming there.

cpu underside got same pinouts?

PS: blown caps only after power on ?

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

the big ones were smoking the little guys just came out of place

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

lol...the CPU's got some pinouts/signals different I think...Did You check the datasheet???
Also the core 2 duo one is compatible only with Mobile Intel 945PM...

they both had the 82801 gbm exactly same one

[loser18]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

they both had the 82801 gbm exactly same one

I'm talking about north not south...

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

near the cpu there are these 2 coils. check if they are shorted. and if not when u power on check voltage coming there.

cpu underside got same pinouts?

PS: blown caps only after power on ?

CAPS blew as soon as u plugged in the ac

ill check for shorts and voltages probably tomorow.

if i get to it today ill post results thanks for the help.

It has same pinouts.

This is where i got the idea from

http://forums.macrumors.com/showthread.php?t=948160

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

I'm talking about north not south...

north south lol
hmm ill have a look if not ill replace it

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

I'm talking about north not south...

same one aswell thanks for the info thou

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

near the cpu there are these 2 coils. check if they are shorted. and if not when u power on check voltage coming there.

cpu underside got same pinouts?

PS: blown caps only after power on ?

do i have to pop em out to test the resistance?
they beep when i check continuity on them.

right coils?

[dellxps15]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

yes, that coils. u have to put black wire on metal (usb firewire lan and so on)

and red in one side of coil.

i use multimeter in diode test mode. if it is shorted, i remove coil and see if short is in wich side, but most likely bad cpu bga

[drdyzio]

Re: A1181 coreduo =&gt; core2duo upgrade cpu

ill check right now maybe my alignment was off
ill report back!!!
Grazie dellxps15