PowerBook G4 17" 1.67 will not start up
Machine hung, then would not restart. Have read similar questions/answers, mine acts differently. On pressing "on" switch, speaker bongs normally. Fans and superdrive whir at first, but caps lock light will not come on when pressing caps lock kee.. After 30 seconds or so, superdrive stops. Small fans still running, but nothing on screen. Tried resetting PMU. No change. Will not eject CD by pressing touchpad when starting. Using 65W power supply, light on plug works normally, and battery is fully charged. Any suggestions will be appreciated.
Thanks, rdklinc. On your advice, I connected an external monitor. No signal. The CD was inserted AFTER the problem started (I thought maybe the CD had a system on it, and maybe could boot from that if the hard drive was bad), so I'm pretty sure the problem is not the CD. This machine has only a single 512K bank or RAM. I just tried re-seating it, and that didn't change anything.
The screen is completely black the whole time. Same results with and without the battery. Just tried the flashlight trick, and I'm not seeing any faint image. Same results holding the option key down while booting.
You speak of resetting the both PMU and the PRAM. What I have done is remove power and battery and hold (5 seconds) the power key then release. I've also done the shift-option-command-start press and release, and wait five seconds. I think either or both of these will reset the PMU. I've also pressed start and then (quickly) held down option-command-P-R. I'm not sure that is working, because I get only one "bong" tone, and I think it should give me at least two.
What seems so strange is that the caps lock light will not come on. Does that mean the PMU is not running? The little white light on the screen latch button does light as soon as the "on" button is pressed, but the caps lock light will not respond at all. Sure do hope this is not a video chip/logic board issue--logic boards are very expensive, I see.
Thanks so much for your help.
Questa è una buona domanda?