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Can an 820-3024(4gb) SMC migrate to a 2gb version of the same board?

Table flip! Well...Thanks Duke

Forgot to add that if on_off shorted and held for a bit the cpu gets warm

Out of boredom/determination/sub-consious desire to waste time.?.? i circled back around to this one and it appears I mistakenly relayed inaccurate info. CPU vcore IS indeed still present. Same symptoms, fan spins for 3 and stops without any signs of attempting to power cycle. during the 3...

Your describing the EXACT symptoms i experienced when i did fuck with the bios... I didn't clean the me region properly, both times i did so i got what you have. Obviously deferred to the advice above however

Apologies Louis. My comments were not intended to imply dissatisfaction or disrespect and didn't take into account the collective community aspect of this forum.. Thanks for clarifying. Btw it was a bad battery at fault here.

hey duke, sarcasm... sorry I read a post where you mentioned quad bit mode needing to be set when flashing a bios onto a new nand chip. Does that apply for all boards, specificlly 3023's? where in ASD is the me region state displayed; is that test included in 3s14? Machine is lagging pretty...

Thx for the hint. Got it.

ok........ nice

Got around to test driving this one finally, all systems are a go but I get the impression it's not permorming optimally. Originally there were some spi termination components missing, replaced them. Misdiagnosed the U6100 as failing as the board would only turn on after heat was applied to the...

I could resell it on eBay with the same ethics as the original seller. These boards come with either nothing wrong at all or as garbage failed attempted repair.

Thanks guys

Noted. I've never attempted any BGA rework before but looking like it's gonna be a cornerstone.

L2 sells them =]

Bios no go and I may have ruined christmas. I forgot that I borrowed R7012 and R7021 from U7400 CPUIMVP_FB and CPUIMVP_FBA. Plugged in and got full fan spin (huh?) without them but cpu vcore was gone. by the time i realized my mistake an put them back, quarter turn returned and now missing cpu...

I was thinking maybe spi so temp swapped one in, was able to reset pram and smc. Couple more power cycles and it returned. Any thoughts on what that could be? Will post more details shortly

I forgot I borrowed some fb resistors from from u7400, replaced &. ppbus_g3h back at 8.4. but no orange julius! Relowed smc..battery <---> smc now chatty cathy. this one is a wrap. thanks louis!

Got it. Why do failed smc's pull down ppbus_g3h and is that always an indication of it's state?

Okayyy.... this one, Reaches S0, chimes, screen light turns on then right at the end of the initial chime it immediately restarts and gives about 3/4 length incomplete chime, restarts, gives a half chime and repeats each time less and less chime audible.

Shiiioot. 8.26 on PPBUS_G3H. V to ground on both lines are good. Anything else to check before the bullet bite? And... What are the odds that a reflow will bless this thing? There are a few red TP's around the SMC, I suppose it's worth trying. You may be selling an smc stencil soon.