Recent content by JAMMARob

Looooot of dark traces on the underside of the logic board near the sound section. Gonna be fun checking all of these connections!

Thanks for the tips everyone. I cracked it open and reseated everything but no bueno. I'll swap out the RAM on the logic board and see where that gets me. 

Gotcha. I will investigate further and report back!

I recently picked up a Duo 2300C that is in excellent physical condition. The only problem: I have removed the RAM expansion and it has made no difference. Could it be internal RAM? It also plays the chime of death :(

Hoping that's not the case! I'll create a boot disk and try to start it, then figure out why I am not getting any sound. I haven't been using a PRAM battery during testing. Should I be?

So I decided to clean the board, dry it, and let it dry under a fan overnight after seeing the cap goo under that regulator. I am back to no sound, but the hard disk spun up for about 10 seconds, then spun back down. Disk drive still isn't whining but didn't have time to test it further. Maybe...

Interestingly enough, when I inspected the board again, I noticed that the diode at D1 was super crusty and underneath the LT1070 was a lot of capacitor juice! The diode fell off of the board! I was able to clean it and repair the pads to solder it back in place. Tested and now I have sound and...

DEFINITELY changed all of the caps, even thru-hole. In fact, the thru-hole caps had leaked the most.  I'll start at the LT1070 and work my way down the circuit!

Howdy! I am in the process of restoring a Macintosh Portable (5126) I recently picked up from a former Apple employee. Taking the advice of the forum, I immediately rebuilt the battery with new EnerSys Cyclon X cells and replaced all of the capacitors on the logic board. The leakage and...