Recently I got PB2400c from Yahoo Auction about $60. It was listed as junk, but cosmetically it seems okay, so I did bet.
After I got it, I disassembled it, and found some not-so-good situations.
1. Green crystals. Yes. PRAM battery has gone really bad. Fortunately, most of battery acid was on inner frame, and there are no visible corrosion on logic board and CPU daughter board.
2. Some of logic board screws are quite stripped. I did almost everything to undo them. Drilled to remove head, smack brass insert from back of frame to remove with inserts. All failed. Eventually, I cut inner frame to release brass insert.
However, I was able to completely disassemble and cleaned battery acid from my unit as much I can, and reassembled.
Now, second problem was I didn't have power adapter for PB2400c. So, I bought off-the-shelf 24V 2A DC adapter, and soldered 3.5mm stereo plug to build makeshift PSU.
When I connected power to unit, LED on display cover lit, but didn't response to power key.
I can hear little click sound from speaker when I press reset button located in back IO section, but still no sign of booting. I tried PMU/PRAM reset, but still no luck.
If I push reset button repeatedly, it keep cycling between green LED <-> speaker click.
During researching, I stumbled upon SMT fuses from this community. So I tested all fuses with multimeter and inspected visually, all fuses were okay.
I completely disassembled and rebuild it several times, but still nope.
It seems some kind of power is flowing through because when I put it still my unit after I hear speaker click, it became warm on the bottom.
At this point, I got little tired with my unit. It seems this thing is really broke, so only way to get working PB2400c is get one with smashed display or pay $700 for one equipped with G3/320 card. That's waaaay to much for me.
Is there any useful material to troubleshoot and fix my unit?
If not, I'm considering to sell this one as parts and get PB G3 or something can run classic Mac OS.
P.S. I was thinking to get 68K PB, but 2.5" SCSI HDD is keep away me to get one. Darn SCSI!
After I got it, I disassembled it, and found some not-so-good situations.
1. Green crystals. Yes. PRAM battery has gone really bad. Fortunately, most of battery acid was on inner frame, and there are no visible corrosion on logic board and CPU daughter board.
2. Some of logic board screws are quite stripped. I did almost everything to undo them. Drilled to remove head, smack brass insert from back of frame to remove with inserts. All failed. Eventually, I cut inner frame to release brass insert.
However, I was able to completely disassemble and cleaned battery acid from my unit as much I can, and reassembled.
Now, second problem was I didn't have power adapter for PB2400c. So, I bought off-the-shelf 24V 2A DC adapter, and soldered 3.5mm stereo plug to build makeshift PSU.
When I connected power to unit, LED on display cover lit, but didn't response to power key.
I can hear little click sound from speaker when I press reset button located in back IO section, but still no sign of booting. I tried PMU/PRAM reset, but still no luck.
If I push reset button repeatedly, it keep cycling between green LED <-> speaker click.
During researching, I stumbled upon SMT fuses from this community. So I tested all fuses with multimeter and inspected visually, all fuses were okay.
I completely disassembled and rebuild it several times, but still nope.
It seems some kind of power is flowing through because when I put it still my unit after I hear speaker click, it became warm on the bottom.
At this point, I got little tired with my unit. It seems this thing is really broke, so only way to get working PB2400c is get one with smashed display or pay $700 for one equipped with G3/320 card. That's waaaay to much for me.
Is there any useful material to troubleshoot and fix my unit?
If not, I'm considering to sell this one as parts and get PB G3 or something can run classic Mac OS.
P.S. I was thinking to get 68K PB, but 2.5" SCSI HDD is keep away me to get one. Darn SCSI!
Last edited by a moderator: