powerbook display problems
hi all,
i have posted below problem on the apple forums, but they have a habit of deleting posts that point out unsolved problems....so i'll try it here
OK, here's the thing. when i work on my g4 pb 12" 1.5ghz sometimes my screen just goes black. that is, the back-lighting goes off. --oops it happened again just now! -- the system doesnt go to sleep, since i still see my desktop when i hold it against a light.
scren brightness blocks are all the way-up and pressing the brightness buttons does not have any effect.
the only thing that usually helps is closing the lid to put it to slape and then wake it again. like i said usually since sometimes only a hard reset helps.
it happens totally random, even when typing this message. below is a part of my log of the period starting little before the screen went black until i got it back with the sleep-wake trick. i dont see anything weird, but maybe you do?
it seems this problem is pretty rare, since i cant find it in a bunch of forums, i posted this almost a year ago on apples forum, but its deleted and until now no solution is found. i do seem to remember seeing a post of an older pb having the same problem.....but also no solutions is given or even problem pointed out.
i have already tried resetting pram + nvram. that didnt help.
it only happens when on battery, never when on AC power.
can anyone of you help me out here ?
system log:
Apr 6 22:00:06 Toolman kernel[0]: AirPort: Link DOWN (Client disAssoc 0)
Apr 6 22:00:06 Toolman configd[73]: AppleTalk shutdown
Apr 6 22:00:06 Toolman configd[73]: AppleTalk shutdown complete
Apr 6 22:00:06 Toolman launchd: Server e88f in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[3085]: exited abnormally: Hangup
Apr 6 22:00:06 Toolman lookupd[3102]: lookupd (version 369.5) starting - Thu Apr 6 22:00:06 2006
Apr 6 22:00:06 Toolman configd[73]: posting notification com.apple.system.config.network_change
Apr 6 22:00:06 Toolman launchd: Server e897 in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[3102]: exited abnormally: Hangup
Apr 6 22:00:06 Toolman lookupd[3103]: lookupd (version 369.5) starting - Thu Apr 6 22:00:06 2006
Apr 6 22:00:06 Toolman configd[73]: setting hostname to "Toolman.local"
Apr 6 22:00:13 Toolman kernel[0]: System Sleep
Apr 6 22:00:13 Toolman kernel[0]: System Wake
Apr 6 22:00:13 Toolman kernel[0]: Wake event 0008
Apr 6 22:00:14 Toolman kernel[0]: ADB present:84
Apr 6 22:00:15 Toolman kernel[0]: AirPort: Link Active: "SpeedTouchD7F229" - 009096cf55da - chan 9
Apr 6 22:00:15 Toolman configd[73]: AppleTalk startup
Apr 6 22:00:18 Toolman launchd: Server 0 in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[3103]: exited abnormally: Hangup
Apr 6 22:00:18 Toolman lookupd[3108]: lookupd (version 369.5) starting - Thu Apr 6 22:00:18 2006
Apr 6 22:00:18 Toolman configd[73]: posting notification com.apple.system.config.network_change
Apr 6 22:00:18 Toolman lookupd[3109]: lookupd (version 369.5) starting - Thu Apr 6 22:00:18 2006
Apr 6 22:00:18 Toolman configd[73]: setting hostname to "toolman.lan"
Apr 6 22:00:20 Toolman mDNSResponder: Repeated transitions for interface en1 (10.0.0.7); delaying packets by 5 seconds
Apr 6 22:00:21 Toolman configd[73]: AppleTalk startup complete
i have posted below problem on the apple forums, but they have a habit of deleting posts that point out unsolved problems....so i'll try it here
OK, here's the thing. when i work on my g4 pb 12" 1.5ghz sometimes my screen just goes black. that is, the back-lighting goes off. --oops it happened again just now! -- the system doesnt go to sleep, since i still see my desktop when i hold it against a light.
scren brightness blocks are all the way-up and pressing the brightness buttons does not have any effect.
the only thing that usually helps is closing the lid to put it to slape and then wake it again. like i said usually since sometimes only a hard reset helps.
it happens totally random, even when typing this message. below is a part of my log of the period starting little before the screen went black until i got it back with the sleep-wake trick. i dont see anything weird, but maybe you do?
it seems this problem is pretty rare, since i cant find it in a bunch of forums, i posted this almost a year ago on apples forum, but its deleted and until now no solution is found. i do seem to remember seeing a post of an older pb having the same problem.....but also no solutions is given or even problem pointed out.
i have already tried resetting pram + nvram. that didnt help.
it only happens when on battery, never when on AC power.
can anyone of you help me out here ?
system log:
Apr 6 22:00:06 Toolman kernel[0]: AirPort: Link DOWN (Client disAssoc 0)
Apr 6 22:00:06 Toolman configd[73]: AppleTalk shutdown
Apr 6 22:00:06 Toolman configd[73]: AppleTalk shutdown complete
Apr 6 22:00:06 Toolman launchd: Server e88f in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[3085]: exited abnormally: Hangup
Apr 6 22:00:06 Toolman lookupd[3102]: lookupd (version 369.5) starting - Thu Apr 6 22:00:06 2006
Apr 6 22:00:06 Toolman configd[73]: posting notification com.apple.system.config.network_change
Apr 6 22:00:06 Toolman launchd: Server e897 in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[3102]: exited abnormally: Hangup
Apr 6 22:00:06 Toolman lookupd[3103]: lookupd (version 369.5) starting - Thu Apr 6 22:00:06 2006
Apr 6 22:00:06 Toolman configd[73]: setting hostname to "Toolman.local"
Apr 6 22:00:13 Toolman kernel[0]: System Sleep
Apr 6 22:00:13 Toolman kernel[0]: System Wake
Apr 6 22:00:13 Toolman kernel[0]: Wake event 0008
Apr 6 22:00:14 Toolman kernel[0]: ADB present:84
Apr 6 22:00:15 Toolman kernel[0]: AirPort: Link Active: "SpeedTouchD7F229" - 009096cf55da - chan 9
Apr 6 22:00:15 Toolman configd[73]: AppleTalk startup
Apr 6 22:00:18 Toolman launchd: Server 0 in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[3103]: exited abnormally: Hangup
Apr 6 22:00:18 Toolman lookupd[3108]: lookupd (version 369.5) starting - Thu Apr 6 22:00:18 2006
Apr 6 22:00:18 Toolman configd[73]: posting notification com.apple.system.config.network_change
Apr 6 22:00:18 Toolman lookupd[3109]: lookupd (version 369.5) starting - Thu Apr 6 22:00:18 2006
Apr 6 22:00:18 Toolman configd[73]: setting hostname to "toolman.lan"
Apr 6 22:00:20 Toolman mDNSResponder: Repeated transitions for interface en1 (10.0.0.7); delaying packets by 5 seconds
Apr 6 22:00:21 Toolman configd[73]: AppleTalk startup complete
Comments
my approach was to install tiger fresh. then work a few days. and each day install some more tools......so if the black screen crap would come back i could tie it to a installed program.....but i was only browsin in safari...with no tool installed for more than a week and bam it was back ! it was going black a few seconds after i got it back with a sleep-wake trick.....even a restart didnt help much.....a fews secs after log-in bam black....
Originally posted by toolman2k6
my approach was to install tiger fresh. then work a few days. and each day install some more tools.
That was a good idea. Shame it didn't work
It sounds like the computer is getting a bit confused and putting the display to sleep even when you are still using it. I was going to suggest a hardware problem such as a loose ribbon cable, but since it only happens on battery, it probably isn't that.
Have you had a look at the settings in the "energy saver" pane of system preferences?
Originally posted by Mr. H
That was a good idea. Shame it didn't work
It sounds like the computer is getting a bit confused and putting the display to sleep even when you are still using it. I was going to suggest a hardware problem such as a loose ribbon cable, but since it only happens on battery, it probably isn't that.
Have you had a look at the settings in the "energy saver" pane of system preferences?
well to be honest.....it also started happening when plugged in. i checked all settings all the time