A Macintosh IIci and a Red Maxwell

[uniserver]

yeah i pulled dougg3's out and popped a stock se/30 in. and it gets the chime of death.

So it looks like because dougg3's is based off the IIsi 32 bit clean, that is why it works in everything

so looks like a IIsi or one of dougg3's might work… sounds like you might have some eaten traces over near your rom's.

are the roms removable or soldered… mine are soldered.

but doesn't matter because i have doug's rom simm in there.

he only charges 30 bucks. if it comes down to it.

 

[sadmanonatrain]

Uniserver,

Sounds to me like you need to change all the big radials.the Iici and Iicx, even if those radials 220uf . 470uf caps don't look bad always change them anyways.

just hearing the chime of doom tells you a lot.

I've replaced all of the radial capacitors on this board and it did not change anything.

For some reason I cannot turn the IIci off via its power switch; I always need to unplug it to turn it off.

Ike,

but is an SE/30 rom actually supposed to work in a IIcx/IIci?

Somewhere online there is a compatibility matrix that deals with ROMs that can be used with the IIci. I don't think it is supposed to work!

I have not been able to get a IIfx ROM working in the IIci. I'm sure that another member of this forum has has success with this.

Thanks

 

[Ike]

Ah thanks for taking the time to try Uniserver!

Reason I was trying to boot with SE/30 rom was to see if the IIci would give the same random floppy drive bus errors as the SE/30, to make sure the rom wasnt bad.

 

[uniserver]

oh the IIfx rom gives you the chime of death as well?

i don't know how the IIfx rom would work in your Iici.

get a magnification glass and inspect the traces,

do you have the ability to remove your rom's?

like use a heat gun, if they are soldered… maybe that battery acid leaked under the roms.

maybe you could pull them out and you will see some eaten traces.

he has the same issue with this amiga 500, had to pull the IC, to do some repairs.

http://www.youtube.com/watch?v=Aj0Qbrs_3Gk

 

[sadmanonatrain]

Hello all,

I have removed the ROM and socket from the logic board. None of the traces look obviously eaten so I started to test continuity between where the ROM would be and vias.

All of these points test good for continuity apart from one. It is the fifth pin on the right side of the ROM if the ROM was closest to you.

I'll track down its corresponding via and solder a wire to where the fifth pin would be. Hopefully this will provide a solution.

Uniserver, thanks for the video link. It was quite informative!

 

[uniserver]

Yeah i don't know why but I like that guy and his videos.

He is a little off the wall…

I feel like he not only cares, but he takes extra time to explain things, maybe he will become a college instructor some day?

 

[sadmanonatrain]

Hello all,

I've just fixed two points on the logic board that failed continuity testing. They test fine now.

If I try to boot the IIci off its own ROM I get no chime; as usual. But when I try the IIfx ROM I also get no chime; as opposed to the chime then chimes of death I used to get.

I don't know if I'm getting somewhere or not!

Thanks

 

[uniserver]

what do you have in there for ram?

is the ram known good?

 

[techknight]

There is a couple iici boards on ebay pretty cheap rigjt now.

 

[sadmanonatrain]

Uniserver,

what do you have in there for ram?
is the ram known good?

I've tried a few different RAM SIMMS, mostly 1Mb ones, that I know work. I put them in bank 1. But I still get the same result.

I have verified the traces and they test good for continuity. The ROM is receiving its 5v from pin 32.

Thanks

 

[uniserver]

can you take a high resolution photo of the pcb where the battery explosion was?

the fact this SE/30 Rom gave you chime of death tells me your close!

i bet if you had a IIsi rom simm or one of dougg3's it would boot up.

but then again after reading this … the IIfx rom should work too..

http://lowendmac.com/1989/mac-se30/

i mean if you are hitting the power button and its coming on, that is half the battle.

the next thing you should hear this the start up chime.

if you don't get that then… usually a rom type thing… or ram.

if you turn it on and just let it sit with the monitor connected, does video eventually appear?

i do not think the Iici needs a pram battery to work.

https://groups.google.com/forum/#!topic/vintage-macs/inm32PEDyUA

these guys say it should work with out a pram battery.

 

[sadmanonatrain]

Hello all,

I've taken a picture of the affected area of the logic board (broken traces have now been repaired):



I done some testing yesterday with the IIfx and SE/30 ROMs. When either of them are used in the IIci no chime or chimes of death are produced; the only sound heard from the speaker is a quiet pop.

Before the traces were fixed the IIfx and SE/30 ROMs did produced a chimes of death or a chime then chimes of death.

This seems like a step back!

What could cause a IIci to start-up without a Chime? I've tried different RAM SIMMs but that does not make to IIci work.

 

[sadmanonatrain]

Uniserver,

When I leave the IIci on when attached to a monitor nothing comes on the screen.

I am interested in one of dougg3's ROM SIMMs. Maybe a stripped down version that just works as a IIci ROM?

I hope I'm not flogging a dead horse here!

Thanks

 

[techknight]

Dont give up hope. Its entirely fixable!

 

[uniserver]

memberlist.php?mode=viewprofile&u=14318

you can pm dougg3, they are all the same price 30.00 unless you can get doug to sell you maybe an older one for less

that would be between you and him.

a rom from him is good to have around anyways.

you could pick up this iici board, this one just needs a cap job…

http://www.ebay.com/itm/Apple-Macintosh-Iici-Motherboard-/251397095466?pt=US_Vintage_Computing_Parts_Accessories&hash=item3a886f402a

 

[sadmanonatrain]

Hello all,

I've managed to buy a logic board on eBay for a reasonable price. I'll probably remove the capacitors off the old board and reuse them on the logic board that is coming from the US.

Thanks for all the help!