Portable won't boot, even after recap

[dan6457]

Hi guys,

I have just joined the forum. It looks like there is some great stuff on here.

I have recently tried to get a macintosh portable running. It wouldn't boot so I stripped it down and replaced all the capacitors. The board was then washed in IPA, left to dry and the computer re-assembled. I am running it from a new battery. However it still won't boot up. Rather than explain the symptoms I have uploaded a video showing what it does.

Any help will be very much appreciated.

Thanks.

 

[uniserver]

did you try it with out that ram card in there?

 

[dan6457]

Just tried it, exactly the same as before

 

[unity]

Well you did better than I did when it comes to re-capping, I still don't get a boot chime! I would pull not only the RAM card as suggested, but all I/O devices. If it works, hook up one at a time. Just to rule out any unusual power draws, etc.

 

[dan6457]

I've tried it with nothing connected except the keyboard and mouse, still exactly the same...

 

[uniserver]

The problem with the portables is, people (before your conquest) ran them with out a main battery, with BAD CAPS - with powerbook 2.0a / 3.0a power packs… cooking the living crap out of them.

 

[dan6457]

What components are likely to be cooked and can they be replaced?

 

[uniserver]

who knows. find out and let us all know.



edit:

Sorry if i sound a little negative towards the portable… that is because i'm feeling a little negative towards them at the moment.

as we find out what the fixes are for the 5120 and the 5126 it would be really fantastic if we could make a table of what the issue was… and what was the solution that fixed it.

maybe pictures too?

i think many issues stem front the U1M Hybrid board. -- for the 5120.

next i think for both the 5120 and the 5126, the q14,q15,q16,q20 failures could be a place to start looking….

for the dead dead boards…

other wise for issues like yours you can look up the sad mac code… but more then likely its a serious issue… CPU GLU or MISC GLU that gets nuked.

http://support.apple.com/kb/ta46376

(for me)

The 840av and the Portable seem to have about the same success rate after a recap.

The SE/30 is right behind those.