A1001 PowerBook G4 Titanium DVI startup/power problems

[joshc]

Is anyone here familiar with these? Having a few issues with one that won't power up.

Some details about the problem:

1. I am using the correct 45W adapter.
2. The green ring light appears; this remains solid IF the battery is not connected.
3. If the battery is connected, the ring light goes amber but then goes out after a few seconds, then no light at all.
4. If I try to power on with the battery removed, when green light is present, the fans start and the optical drive tries to initialise for about 1 second, and then power stops.
5. If I try to power on with the battery connected, while the amber light is still on for that few seconds, the behaviour is as per point 4 above.
6. If I try to power on after the ring light has gone off, nothing happens at all.

Things I have already tried:

• I have disconnected the PRAM battery.
• I have reset PMU.
• I have inspected the DC-in board; it visually looks OK but otherwise I cannot tell if something may be up with it.
• I have tried leaving it plugged in to try and give the battery some charge - but the ring light goes off when I do this, so I am not sure its doing anything anyway.

Things I have not tried yet as I'd be surprised if they are the cause

• Powering up with the optical drive disconnected.
• Disconnecting the Airport card and keyboard and seeing if it powers up without those.

Any ideas what to try next? I can source a known working DC-in board fairly cheaply. It seems odd that the machine won't power up even with battery removed and power connected with that green ring light.

 

[joshc]

I have tried powering up with the following disconnected, no change in behaviour: optical drive, hard drive, Airport card, keyboard.

 

[MacUp72]

maybe a bad DC-in board?
I have a 800Mhz Ti that get a bit hot on my lap, maybe thats normal for those..

 

[3lectr1cPPC]

Yeah my 667MHz TiBook gets pretty darn hot, probably needs thermal paste changed. Sounds like you have a dead logic board or a bad dc board.