Mac Pro :: Power Light On But System Will Not Start Up
Oct 16, 2008
I have a G5 Dual 2.5 and the power light on the front (white) is lit but nothing happens when I press the power button. I was trying to reset the PRAM manually by pulling the battery and inplugging the unit because my startup shortcut keys were not working. I had seen it recommended to reset it by pulling the battery and reinstalling in other threads. I put the battery back after about 15 sec and plugged in back in. Now it wont start up.
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Jan 16, 2009
I recently received a Power Mac G5 from work. They told me I could have it, but reformatting the hard drive and reinstalling the OS was on me. So, I took it home, and plugged it in to turn it on, and the white light on the front blinks 3 times and then stays steady... and then blinks 3 times again... and so on and so on.
The RAM that came with it was bad, so I put in 2, 1 GB PC3200 sticks in it. Isn't it a RAM problem?
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Feb 5, 2012
Today I turned on my G5 to recover some files off an old iMac hard drive (can't very well read HFS+ using Windows), and my G5 refused to boot. Your press the power button, the power light flashes normally when you press on the button, but it powers on but the power light never comes on and there isn't a "bong" sound. The fans come on normally, but after a while the fans start picking up speed until they are at full speed.
I tried swapping ram, no change. Pulling ram, no flashing lights, pulling air deflector shield, full speed fans and red light (tells me something is working at least), swapping the video card, pulling the video card and still nothing. The 17" Studio Display power button works to turn on the system, but it has no light either saying the computer is on.
Based on the full speed fans after a while, I'm willing to say I have a failed processor, but that is just a wild guess as I don't normally work with Macs. The system is a Dual 2 GHz Power Mac G5 with 2 gigs ram, 80 GB hard drive, Plextor PX-712A DVD burner (I got this with a DVD-ROM), stock Radeon 9600 Pro and an Airport Extreme card. It runs Mac OS 10.5.8 and has worked great up until today.
Info:
PowerMac, Mac OS X (10.5.8), Late 2004 2 GHz Dual Processor
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Jul 1, 2012
The indicator light is the only thing that comes on when I try to start up my MacBook Pro.
Info:MacBookPro, Mac OS X (10.4.11)
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Jul 16, 2008
I'm a relatively new Mac user. In fact, I haven't had that much experience at all. I work in a donations store and today we got a donation of an iMac. I searched around a bit and I'm sure it's a G5 model. It looks like [URL]. It looks to be in great condition, no scratches, not even a fingerprint on the monitor.
However, when I turned it on, after plugging the power chord in, I started experiencing problems. The fans kicked on and I heard the chime (I assume that was a post?) but I was getting no video and the white LED on the front of the screen was flashing on and off. The exact pattern is strange - I don't think I've see it before. It flashes once, then stops, then flashes again, then stops. Over and over. No sequence. :| The computer did not come with a keyboard or a mouse. I was testing it to see if it actually worked, before I bought the keyboard and the mouse, so I'm wondering if it has something to do with that? I'm not really sure.
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May 4, 2012
my macboook pro won't start and the caps light stays on, what can i do?
Info:
Mac Pro
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Jun 2, 2014
Just geting a light blue screen after Apple logo has loading on start up!! And fans go in high speed and nothing more happens...
Info:
MacBook Pro (15-inch Late 2011)
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Dec 8, 2010
My Macbook Pro randomly shut off (I don't think it was low on battery, but I can't be 100% sure.) Now when I plug in the charger, the light on the charger is green for about 6 seconds, then goes to red and stays red. I cannot turn on the computer, and there is no sign that it is even charging.
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May 19, 2009
My friend's MacBook Air crashed. It blacked out, and turned off. Now, when he presses the power button, he gets a beep, and that's it. the white LED light also doesn't flash. It's a short, soft beep.
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Dec 6, 2010
Power charger light keeps going off, I have to unplug and plug it back in to make it come back. Charger is still working. This started happening this evening. Anyone else having this problem? Should I contact Apple tomorrow or wait and observe a little longer?
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Dec 9, 2010
What does a red light on the power adaptor mean?
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Apr 11, 2012
My MacBook won't boot up without the system disk, has Lion with 4 Gb Ram all updates, has a DVD stuck n the drive?
Info:
MacBook, iOS 5.0.1, 4 GB RAM
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Apr 20, 2012
My PPC G5 Mac Power Pro has been working fine, on one startup recently the screen didn't come on, the keyboard and mouse did not pass the startup test and the white light flashes three times. After a while the fans go into hovercraft mode! I've reseated the RAm and checked all other cards.
Info:
PowerMac, Mac OS X (10.5.8), To be supplied
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May 16, 2010
I have an iMac G5 iSight. When the power button is pressed there is no sound and a white light flashes, but nothing else happens. I tried the power reset method and replaced the power supply, but the same thing happens. The white light just keeps flashing.
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Dec 1, 2007
I've got a nasty issue with my 13-mo. old MacBook.
I'm pretty sure it's a dead logic board and possibly a dead hard drive, which I really, really, really hope not as I don't have backups of everything on the drive. I just upgraded to Leopard this past week and did a clean install so not all of my stuff is setup yet.
Power adapter and battery are inserted. All 3rd party peripherals and RAM have been removed.
MacBook does not chime at boot. The screen flickers, but stays black. If I hold down the power button then try to let it boot the light on the front right flashes constantly (like when it's sleeping but a faster pace), like a turn signal on a car. I can hear the cd-rom drive whining but everything else is dead silent.
I've done everything here with the exception of calling Apple.[URL]
I've also tried FW Target Disk Mode, but the MacBook drive does not show up.
I've done everything I can think of and I'm out of ideas at this point.
Additionally, there's a cd-rom (Tiger Restore CD) stuck in the drive. Holding down the mouse button during restart does not eject this CD. Where is the force eject button (I see no pinhole)?
I have business documents, emails, etc. that I HAVE TO get off this hard drive. How can I do it? I don't have a 2.5" drive enclosure but if that will solve the situation I will pick one up asap.
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Jun 26, 2012
My Macbook Pro does not always turn on first time, it takes awhile to click on, it just clicks every time I try to turn it on, It turns on when its warm though, it also turns off when I close the lid, but the light says it is on, after leaving the lid closed for more then 5 minutes, and I open the lid it is turned off? I do not understand what is cuasing the problem?
Info:
MacBook Pro
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Sep 10, 2009
My Macbook, I have just become aware that the light for power on isn't on, nor does it pulsate on standby. Everything else seems to be working normally, so I can live with this. But could this be a symptom of precursor of a more serious problem elsewhere?
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Mar 12, 2012
I've been using my pmg4 for a while, just recently I noticed that there is a red light located on the logic board on corner of processor heatsink and ram boards. this light is active during when the computer is on. the computer did not misbehave but is it trying to say something? is this normal operation?
Info:
Mac Pro, Mac OS X (10.7.2), MacBook Pro 13.3 | Logic Studio |
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Apr 1, 2012
Wondering if the yellow, charging light, sometimes coming on and going off is an indication of my battery going dead. Mine is a UMBP and the battery hasn't been change. Don't use it too much, though.
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May 26, 2012
I reset the PMU trying to get this monitor to work with my Mini. And that fixed it. However, I have lost my power light?what the heck to do to restore that as with the noise in this office, its the only way I know if the mac is on other than having the monitor switched to this box?
Info:Mac mini, Mac OS X (10.7.4)
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Jul 2, 2012
I have an old macbookpro which doesn't have a good battery. last night it shut off because I didn't have the power chord attached. now I can't power it up. the light on the power chord flashes (slowly) between red and green.Â
Info:
MacBook Pro, Mac OS X (10.4.7)
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Jul 18, 2010
This morning, I synced my iPod with my MacBook and upon completion and permission to disconnect the device, I pulled out the USB cord. At that point the computer instantly turned itself off, and when I hit the power button, I could hear the system trying to start up, but the screen remained black and the sleep light glowed continuously. I unplugged the charger, took out the battery and put it back in, and tried all the troubleshooting tips under the Apple Support guide with no success. I also discovered that when I closed the laptop while it was "on," it would seem to boot up a little more before returning to the black screen. I left it alone for a few hours, and when I tried again to turn it on, it booted up normally and as I was searching for updates, it shut down again as it had earlier.
Does anyone have anything for me to try? I don't want to have to take it into a shop because I can just barely afford to, but I need this computer! Any suggestions would be greatly appreciated :-)
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May 26, 2012
My computer won't start, the monitor dosn't come on, and the sleep light blinks constantly.
Info:
MacBook
Pro, Mac OS X (10.6.8)
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Jul 19, 2007
I am a proud owner of a MAC powerbook G4 for just over 3 years now. It runs MAc OX 10.3. For the last two weeks i have been having issues. First it started to be very slow. Then it would not boot up and i got a blue screen. I ran the file system checks from the OS X and it complained about the volume being bad and said it could not be repaired. i decided to reinstall the whole thing and did a complete erase and install. IT booted up fine. The software updater asked permission to update which i agreed.
After the update was over, the software updater had more updates. I guessed that it was probably giving me updates in the chronological order. During a particular update, it gave the blue screen and "please restart" ... and when i rebooted it did not come up... just a blue screen... i verified the filesystem using the diagnostic tool and it again said it was corrupt .... I have done this twice now and i have a feeling it happened when i was updating the same batch of software updates.... sometimes my software updater would crash everytime i launch it.....
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Apr 2, 2007
I have an ibook G4 (2years old, a part of the battery swap program) that charges normally... for about twenty minutes. Then the light around the charger turns from it's normal "i'm charging" orange to nothing, the light goes out and the ibook switches to battery power. I've just inspected the power chord and there are no strains or tears, the plug at both ends are in good condition and the ibook power socket is fine too.
I've turned the ibook off for a period of time (two days) and reset the power manager... still no difference. The ibook looks and acts just like it should until about twenty minutes into the charge then the light turns off and it's like it's been disconnected. The chord is in correctly, i've even tried the apple extension chord = no joy. If i reconnect the power chord at the wall it's fine, starts charging again... and yes i've tried different sockets on different circuits in the house!
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Aug 29, 2007
I searched forums etc. I have a 867 12" powerbook. The problem is that it will not turn on at all. I took the battery out and pressed a few key and it worked for a little while. Now when I plug it up to recharge the light goes green to red then off. I found a so called reset button on the apple site and lifted the keyboard and it is not in site.
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Sep 28, 2009
I've been asked to take a look at a friends white macbook that won't power on. I've tried resetting the smc etc., with no joy. The battery charge indicator shows 1 fully lit green light and the magsafe connector also is green. Pressing the power button doesn't do anything, no lights, beeps etc. I've tried another power adapter and the magsafe light remains green when connected but the battery still shows 1 green led. Considering the macbook thinks its charged but the battery isn't, is this a dead logic board? Or something else? This macbook is well out of warranty.
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Nov 3, 2009
I recently spilled close to a tablespoon of milk onto the keyboard. Most of this landed on the keys themselves. I thought nothing of this and continued working for 4 hours. I left for 6 hours and came home to a non working Powerbook G4. The green powerlight does come on. I let sit for one day. Still nothing.
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Jan 23, 2010
I went upstairs last night to find my Macbook Pro's charger had no light lit up on it. I tried everything including changing wall sockets, resetting the SMC, with and without the battery - nothing! I then noticed I could feel the electrical current on my Macbook Pro and then it started, a loud ticking coming from the brick. It's dead. It's just under 18 months old. Apple has said that I have no Applecare, no tech support and no warranty so buy a new one. I thought electronics HAD to have a 2-year warranty on them in Europe? Can I take that to apple? It's �60 for a new one and things like this shouldn't fail after just 17 months.
It's the old 85W type. The guy at Apple told me they only do the "new" 60W types. Can I use these with a June '08 Macbook Pro? I've had no end of problems with my MBP. I may call an end to Apple - I'm not happy paying over the odds for this Macbook less than 18 months ago for it to have had so many problems already.
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Jul 24, 2009
I've just recently purchased my Mac Pro and have tried multiple times to leave it on, with the monitor set to sleep (using hot corner) and the computer set not to sleep. The purpose is to be able to access my music library while on the go. For some reason, when I come back to the computer it won't wake, the power light is on so I'm assuming it froze or had a kernal panic.
I'm running Simplify Media and a Hawking USB wifi adapter to access my music on the go, no other 3rd party peripherals.
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