Howdy y'all,
I'm the guy that rebuilds iBook batteries, and I've got a iBook G3 clamshell 466MHz logic board here that's showing some quite odd symptoms. All of this is happening with a known-good power adapter and known good re-celled battery that works perfectly with several other iBooks.
What it's doing:
1. It runs fine off battery. It runs fine off the power adapter.
2. If you insert a battery with the power adapter plugged in, or plug in the power adapter with the battery inserted, it shuts off (sometimes)
3. With ONLY the battery inserted, it shows a green or orange ring around the empty power adapter port (as if there's an adapter plugged in, but there isn't!)
Things I've tried:
1. Replace PRAM super capacitor, clean all corrosion around PRAM supercap and everywhere elsewhere on the board
2. Reset PMU (hold reset button for 10 seconds with no power adapter plugged in, hold power button)
3. Tried 2 different DC-in boards
4. Tried 3 different charger boards
5. Tried running it on the bench with no bottom case installed (to ensure there were no pesky shorts from a potentially bent EMI shield)
Even with a new PRAM supercap, reset PMU, completely different charger boards and DC-in boards, it still exhibits the same behavior.
What I'm going to try next:
1. Replace 150uf 10v and 100uf 35v electrolytic caps on the logic board
2. Inspect for shorts in the area around the charger board and DC-in board
3. Reset PMU again, also reset NVRAM
4. Exorcism
Thoughts? Anyone seen this before?
I'm the guy that rebuilds iBook batteries, and I've got a iBook G3 clamshell 466MHz logic board here that's showing some quite odd symptoms. All of this is happening with a known-good power adapter and known good re-celled battery that works perfectly with several other iBooks.
What it's doing:
1. It runs fine off battery. It runs fine off the power adapter.
2. If you insert a battery with the power adapter plugged in, or plug in the power adapter with the battery inserted, it shuts off (sometimes)
3. With ONLY the battery inserted, it shows a green or orange ring around the empty power adapter port (as if there's an adapter plugged in, but there isn't!)
Things I've tried:
1. Replace PRAM super capacitor, clean all corrosion around PRAM supercap and everywhere elsewhere on the board
2. Reset PMU (hold reset button for 10 seconds with no power adapter plugged in, hold power button)
3. Tried 2 different DC-in boards
4. Tried 3 different charger boards
5. Tried running it on the bench with no bottom case installed (to ensure there were no pesky shorts from a potentially bent EMI shield)
Even with a new PRAM supercap, reset PMU, completely different charger boards and DC-in boards, it still exhibits the same behavior.
What I'm going to try next:
1. Replace 150uf 10v and 100uf 35v electrolytic caps on the logic board
2. Inspect for shorts in the area around the charger board and DC-in board
3. Reset PMU again, also reset NVRAM
4. Exorcism
Thoughts? Anyone seen this before?
