IBook won't start up - power button does nothing, PMU reset not helpful
Hi all - I was using my iBook earlier this morning and it just turned itself off without any warning. It was running off the battery, but had plenty of charge, and there was no 'low power' warning, so it wasn't that.
I can't get it to turn on now. Pressing the power button does nothing - no whirring, beeping, chiming or anything else. I tried resetting the PMU to no effect. No lights appear on the caps lock button. I haven't tried using the Mac OSX cd, but I'm a little afraid I won't get it back out of the slot-load drive with the way the computer is behaving.
I have it plugged in now and it seems to be charging the battery, so I don't think it's related to either power or battery issues. In fact, it seems the power and battery are the only things working! Absolutely nothing else happens. Unresponsive.
My warranty ran out in September (November now, unfortunately) so if it needs servicing I suppose it will be out of my own pocket.
Can anyone help?
Mark
iBook G4 Dual usb 14" Mac OS X (10.4.8)
Ok - good news. I've got the problem fixed.
After a call to Apple Support (called the Canadian one), and a $59 charge (worth it, in my opinion, since my warranty is expired) the gentleman on the line asked me to do a PMU reset with the SHIFT + CTRL + Option + Power combination. That's what I had tried before and it didn't work. Didn't work this time either.
Next, he had me remove the battery, unplug the computer from the adapter, and hold the power button down for 5 seconds. I put the battery back in, plugged it back in, and turned it on.
Voila. Works like a charm. Apparently, there are two ways to do a PMU reset.
Thanks everyone for looking at my thread, and thanks arnie for the responses.
Similar Messages
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Computer won't start by power button only; requires extra reset button push
I have a PowerMac G4 AGP, 400 with 1.5 ram, OS 9.2.2. For some time now I have not been able to start the computer by pushing the power button on the keyboard. To start the computer I can push either the power button on the keyboard or front of the computer, then I have to push the reset button on the front of the computer.
Now I need to do a firmware upgrade and I need the computer to start from the power button alone. I've zapped the PRAM, but haven't opened up the computer to start resetting PMU and changing the battery. Can any of you computer docs give me a diagnosis?
G5180d, G4SDTiBook, G4TiBook, G4 Yosemite, PC 604 Mac OS 9.2.xIt' possible that the battery is weak. Have you ever changed it. See Mac PRAM, NVRAM, CUDA/PMU & Battery Tutorial
This link tells what firmware version you need for OS X. You need version 4.28 (Boot ROM version in Apple System Profiler) Mac OS X: Available firmware updates
http://docs.info.apple.com/article.html?artnum=86117
You need to install the firmware using OS 9 BEFORE you install OS X.
Cheers, Tom -
Help! While doing workaday tasks on my 15" MacBook Pro with 10.6, I got the dreaded slowly unfolding darkened screen with the message "You need to restart your computer. Hold down the power button until it turns off." Kernel panic, I guess.
In the past, in the few times this has ever happened to me, I held down the Power button as instructed, and the Mac turned off.
HOWEVER, this time around, holding down the Power button does absolutely nothing! It doesn't make the computer turn off, no matter how long I hold it down, nor if I try holding it down in combination with other keys.
Needless to say, the OS is completely frozen otherwise, and no keyboard or trackpad actions have any effect.
And since this is the new kind of MacBook Pro -- there's no way to remove the battery!
So, is the only solution, to unplug it from the power supply and simply wait for 8 hours (or whatever) until the battery runs out of juice? Say it ain't so!
(I'm writing this on someone else's computer, needless to say.)
I NEED access to my computer's files TODAY for important work-related matters. Am I out of luck, or is there some secret way to get this darn thing turned off and restarted?If you insist! :
Mon Aug 15 16:37:52 2011
panic(cpu 0 caller 0x2aab55): Kernel trap at 0x0000901a, type 6=invalid opcode, registers:
CR0: 0x80010033, CR2: 0x9e3c6000, CR3: 0x00100000, CR4: 0x00000668
EAX: 0x5c017827, EBX: 0x00000000, ECX: 0x0000000c, EDX: 0x2e80fba0
CR2: 0x9e3c6000, EBP: 0x953d3c18, ESI: 0x0c3c9180, EDI: 0x4633a000
EFL: 0x00010246, EIP: 0x0000901a, CS: 0x00000008, DS: 0x00000010
Error code: 0x00000000
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x953d39f8 : 0x21b50c (0x5d42fc 0x953d3a2c 0x223974 0x0)
0x953d3a48 : 0x2aab55 (0x59616c 0x901a 0x6 0x5962b7)
0x953d3b28 : 0x2a09a8 (0x953d3b40 0x105a00c 0x953d3c18 0x901a)
0x953d3b38 : 0x901a (0xe 0xe3ff0048 0x46330010 0x9260010)
0x953d3c18 : 0x126b657 (0x4633a000 0xc3c9180 0x0 0x0)
0x953d3c48 : 0x1275d0c (0x4633a000 0xb0b9edc 0xc3c9180 0x127589c)
0x953d3c78 : 0x1275e73 (0xb0b9c00 0x4633a000 0xb0b9f20 0x8)
0x953d3ca8 : 0x124f46a (0xb0b9c00 0x4633a000 0x953d3cd8 0x213ebb)
0x953d3cd8 : 0x53717b (0x4633a000 0x8d451f4 0x8d451f4 0x1)
0x953d3d28 : 0x5671d4 (0x4633a000 0x8d451f4 0x8d451f4 0x1)
0x953d3d88 : 0x286234 (0x4633a000 0x8d451f4 0x1 0x0)
0x953d3df8 : 0x21d8ba (0x102f0568 0x8cded84 0x102f0570 0x102f05a4)
0x953d3e38 : 0x210a3a (0x102f0500 0x953d3e7c 0xa0118f8 0x953d3e70)
0x953d3e98 : 0x216c9d (0x102f0500 0x0 0x0 0x0)
0x953d3f18 : 0x294e13 (0x953d3f44 0x0 0x0 0x0)
0x953d3fc8 : 0x2a1018 (0x9b2cba0 0x0 0x10 0xa1bd044)
Kernel Extensions in backtrace (with dependencies):
com.apple.driver.AppleIntelHDGraphics(6.2.4)@0x124b000->0x12f9fff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x952000
dependency: com.apple.iokit.IONDRVSupport(2.2)@0x985000
dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0x963000
BSD process name corresponding to current thread: WebKitPluginHost
Mac OS version:
10H574
Kernel version:
Darwin Kernel Version 10.5.0: Fri Nov 5 23:20:39 PDT 2010; root:xnu-1504.9.17~1/RELEASE_I386
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 412491560738451
unloaded kexts:
com.apple.driver.MaxTranserSizeOverrideDriver 2.5.8 (addr 0x5bef7000, size 0x12288) - last unloaded 412342043556592
loaded kexts:
org.pqrs.driver.KeyRemap4MacBook 6.7.0 - last loaded 411988463406028
com.usboverdrive.driver.hid 3.0.1
at.obdev.nke.LittleSnitch 2.2.05
com.apple.driver.AppleHWSensor 1.9.3d0
com.apple.filesystems.autofs 2.1.0
com.apple.driver.AGPM 100.12.19
com.apple.driver.AppleMikeyHIDDriver 1.2.0
com.apple.driver.AppleHDA 1.9.9f12
com.apple.driver.AppleUpstreamUserClient 3.4.5
com.apple.driver.AppleMCCSControl 1.0.17
com.apple.driver.AppleMikeyDriver 1.9.9f12
com.apple.driver.AudioAUUC 1.13
com.apple.driver.AppleIntelHDGraphics 6.2.4
com.apple.driver.AppleIntelHDGraphicsFB 6.2.4
com.apple.driver.SMCMotionSensor 3.0.0d4
com.apple.kext.AppleSMCLMU 1.5.0d3
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AudioIPCDriver 1.1.6
com.apple.driver.ACPI_SMC_PlatformPlugin 4.5.0d5
com.apple.GeForce 6.2.4
com.apple.driver.AppleGraphicsControl 2.8.68
com.apple.driver.AppleLPC 1.4.12
com.apple.driver.AppleUSBTCButtons 200.3.2
com.apple.driver.AppleUSBCardReader 2.5.8
com.apple.driver.AppleUSBTCKeyboard 200.3.2
com.apple.driver.AppleIRController 303.8
com.apple.iokit.SCSITaskUserClient 2.6.5
com.apple.iokit.IOAHCIBlockStorage 1.6.3
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.driver.AppleUSBHub 4.1.7
com.apple.driver.AppleFWOHCI 4.7.1
com.apple.driver.AirPortBrcm43224 426.36.1
com.apple.iokit.AppleBCM5701Ethernet 2.3.9b6
com.apple.driver.AppleAHCIPort 2.1.5
com.apple.driver.AppleEFINVRAM 1.4.0
com.apple.driver.AppleSmartBatteryManager 160.0.0
com.apple.driver.AppleUSBEHCI 4.1.7
com.apple.driver.AppleACPIButtons 1.3.5
com.apple.driver.AppleRTC 1.3.1
com.apple.driver.AppleHPET 1.5
com.apple.driver.AppleSMBIOS 1.6
com.apple.driver.AppleACPIEC 1.3.5
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClient 105.13.0
com.apple.security.sandbox 1
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.11
com.apple.driver.AppleIntelCPUPowerManagement 105.13.0
com.apple.driver.DspFuncLib 1.9.9f12
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.AppleProfileTimestampAction 10
com.apple.driver.AppleProfileThreadInfoAction 14
com.apple.driver.AppleProfileRegisterStateAction 10
com.apple.driver.AppleProfileKEventAction 10
com.apple.driver.AppleProfileCallstackAction 20
com.apple.driver.AppleSMBusController 1.0.8d0
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IOSurface 74.2
com.apple.iokit.IOBluetoothSerialManager 2.3.8f7
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.iokit.IOAudioFamily 1.7.9fc4
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleHDAController 1.9.9f12
com.apple.iokit.IOHDAFamily 1.9.9f12
com.apple.iokit.AppleProfileFamily 41
com.apple.driver.AppleSMC 3.1.0d3
com.apple.driver.IOPlatformPluginFamily 4.5.0d5
com.apple.driver.AppleSMBusPCI 1.0.8d0
com.apple.nvidia.nv50hal 6.2.4
com.apple.NVDAResman 6.2.4
com.apple.iokit.IONDRVSupport 2.2
com.apple.iokit.IOGraphicsFamily 2.2
com.apple.driver.BroadcomUSBBluetoothHCIController 2.3.8f7
com.apple.driver.AppleUSBBluetoothHCIController 2.3.8f7
com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.5
com.apple.iokit.IOUSBMassStorageClass 2.6.5
com.apple.driver.IOBluetoothHIDDriver 2.3.8f7
com.apple.iokit.IOBluetoothFamily 2.3.8f7
com.apple.driver.AppleHIDMouse 162
com.apple.driver.AppleUSBMultitouch 206.6
com.apple.iokit.IOUSBHIDDriver 4.1.5
com.apple.driver.AppleUSBMergeNub 4.1.5
com.apple.driver.AppleUSBComposite 3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.5
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOAHCISerialATAPI 1.2.5
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.5
com.apple.iokit.IOUSBUserClient 4.1.5
com.apple.iokit.IOFireWireFamily 4.2.6
com.apple.iokit.IO80211Family 312
com.apple.iokit.IONetworkingFamily 1.10
com.apple.iokit.IOAHCIFamily 2.0.4
com.apple.iokit.IOUSBFamily 4.1.7
com.apple.driver.AppleEFIRuntime 1.4.0
com.apple.iokit.IOHIDFamily 1.6.5
com.apple.iokit.IOSMBusFamily 1.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 6
com.apple.driver.DiskImages 289
com.apple.iokit.IOStorageFamily 1.6.2
com.apple.driver.AppleACPIPlatform 1.3.5
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0 -
Won't boot, intermittent, power button does little (Early 2008/A1260/15")
I've got a Macbook Pro Early 2008/A1260/15". It's a 2.5Ghz running 10.5.8 with 2GB of RAM. Model Identifier MacBookPro4,1, Boot ROM MBP41.00C1.B00 and SMC version 1.27f2.
Sometimes it will not boot. When it does not boot, the only thing that occurs when the power button is pressed is that the hard drive spins up. Nothing else happens. The display does not turn on, the system makes no sounds, the light on the latch does not illuminate, and the fans do not activate (I have tried booting with the case open to watch the fans and they do not spin).
If the AC adapter is plugged in during such an attempt, the hard drive seems to stay on indefinitely, until the power button is held down for 5 seconds. If the laptop has only battery power during such an attempt, the hard drive will power down after a couple of seconds.
There are 3 sorts of things that seem to allow it to boot in such a scenario:
1) Time. If I wait for an hour or sometimes many hours, it boots fine.
2) SMC reset. Sometimes disconnecting AC and battery and holding the power button for 5 seconds, then reconnecting power allows a successful boot
3) Random repeated attempts (generally with AC power) of holding down power to shut down the drive after an unsuccessful boot and then trying again. This sometimes works.
At other times, it boots fine and will boot fine repeatedly.
I tried running Apple Hardware Test. The short test was successful. The extended test was also successful, although during the test the mouse froze, and after the test succeeded, the mouse remained frozen.
I have tried re-seating the RAM, swapping the RAM sticks, trying each of the 2 RAM sticks individually in each of the 2 slots, but none of this helps.
I have removed the hard drive and attached it to another computer where I ran a SMART short and extended self test, both of which were successful. There is no evidence that there is anything wrong with the drive.
Any ideas? Is it the logic board? Is it the so-called "left I/O board"?
Please help. thanks.I did. It's just that I am in a developing country with only 8 authorized service providers in the entire country, and 0 apple stores. They were not able to reproduce, diagnose, or fix the issue.
So I'm hoping that my own tests and the experience of others can help me narrow it down a bit more so that I can bring it back again and have a higher chance of success. -
G4 MDD won't start. Power button doesn't light up.
I just moved, shipped my computer (a G4 mirrored door drive) and when I unpacked it and plugged it in, it wouldn't even act like there was power to it. No light up on the power button, no chime, no nothing. I used my Blackberry to troubleshoot and ended up resetting the PMU.
Today, about a week later, I was having trouble with my internet so I shut everything down and flipped the switch on my powerstrip to reset it. (GRR. I probably should have just unplugged the modem and plugged it bag in.) Now, my computer is doing the same thing. Now lights, no chimes, nada.
Should I reset the PMU again? Is that bad to do? Why would it possibly be doing this again?
Help!Unplugging your Mac from it's power source causes the battery to discharge as it trys to maintain PRAM settings and the Macs clock. If you have done this before, or often cut power off to your Mac via a power strip or wall switch, your battery may be depleted. Since it's not a rechargable battery it'll need to be replaced. You can also check it with a voltmeter.
Even if you have'nt done it before, this disconnect may have been enough to kill it, if it was weak to begin with.
I would check it first. When mine went, I had no response from my Mac at all; just a light on my power button; absolutely no boot at all.
Check out things in Texas Mac Man's tutorial on the subject. His tutorial is a little dated (don't believe it even mentions G5's) but the info in it, except SMU not being included, still applies.
Cheers!
DALE -
XFCE4 Power button does nothing
I am running XFCE4, and in the xfce4 power manager I have it set to ask me what to do when I press the physical power button on my laptop, but when I press it nothing happens at all. Is there something else I have to do to get this to work? I have acpid installed and running, LXDM as the login manager, and dbus is started at boot via fedora-readahead.
Works fine when I use the logout button on my panel or in the xfce menu, I can shutdown/reboot from there. But the power button on my laptop is giving no response.
Last edited by bwat47 (2011-12-20 14:09:08)I have the exact same problem. I want my power button to ask me whenever I press it. I found out that executing
/usr/bin/xfce4-session-logout
Will show the usual logout promt where I can select my next action.
I tried adding the same command to /etc/acpi/handler.sh but it didn't execute properly, giving me a warning about not knowing the session. My guess is that I have to put something in from on the logout command so that it knows what user/session it should execute as. I also tried the things at the xfce wiki but they seemed to have failed aswell. Maybe you'll be luckier or figure something out as I'm still a beginner with bash scripts.
http://forum.xfce.org/viewtopic.php?id=6158
and
http://wiki.xfce.org/tips
Last edited by alexkarro (2012-01-04 15:10:15) -
G4 won't start unless from a restart or pmu reset
my G4 won't start unless from a restart or, if the computer has been shut down, I have to reset the pmu - with inside button or by removing battery.
Can anyone think of why this happens? What goes on with a shut down that doesn't with a restart? With the problem, nothing happens after the chime and I must hard shut-down, unplug and reset pmu, then it's fine.
Thanks for any thoughts or suggestions.
Henrywell, I can't find anything wrong with it. maybe my logic board is shot. i guess i'll take it in to tek serve or an apple store and see if they can figure it out.
thanks for the suggestions, tom.
henry -
MBP won't start when power button is pushed
Unit stays absolutely silent. Any suggestions?
S.U.
Thank you for your response. I'm quite sure that the problem was that the magnetic power adaptor hadn't connected well and wasn't charging. Its LED showed green but the battery was drained. I checked the battery by pushing its test button and a single LED slowly flashed indicating that the battery needed charging. After resetting the adaptor connection and giving it time to charge, the MBP started without a problem.
Moral of the story... don't over look the obvious.
Thanks again. -
Lenovo V570 Laptop Power Button does not work. Did I screw it up?
Hi, my Lenovo V570 keyboard recently stopped working so I took the keyboard off to reposition the cable. In the process I disconnected another cable on the motherboard (shown in the pictures below). I also cant find the black plastic piece that was holding it down.
Now not only does the keyboard not work but the power button does nothing. After research though Ifound out this laptop is notorius for having the power button go bad.
When I plug in the AC adapter I do see the battery light go on and it charges so I dont think the motherboard is bad. I
have tried every trick in the book as far as getting static out of the laptop power button (holding down power button for
certain times). I looked at the mainteneance manual for this laptop and could not figure out what the disconnected cable does. I have tried reconnecting the cable without the plastic piece but that did not work.
Is the disconnected cable responsible for this or should I order a new power button board with cable?
Link to image 1
Link to image 2
Moderator note: large image(s) converted to link(s): About Posting Pictures In The ForumsHi Deziant,
Welcome to Lenovo Community!
As per the query we understood that you are facing issue with power button not working in your V570 laptop.
As per the snap shot which you have shared it looks like the black support connector is broken, you can fix this cable by using a gum, but I would suggest you to visit nearest service center to fix this issue.
Click here to open a link where you can select the country and get the exact contact support number. I’m sure they will be a great help.
Hope this helps. Do post back if issue persists!
Best regards,
Ashwin.S
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
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I've been having some serious power issues with my 3-month old PC for a few weeks now. All was working perfectly fine until the PSU (450w "Zorro" PSU - came with my case) accidentaly got switched to 115v mode while still plugged into the computer and plugged into the 230v mains.....oops. Needless to say it did not survive the experience, and it was sent off and duly replaced with an equal model.
Then, I installed this PSU into the case and plugged it all in. The computer booted, as did windows, and all seemed OK.... at the desktop at least. But, whenever I got into a CPU and graphic intensive game the PC shut down. And wouldn't turn on. That was, untill I took the power plug out of the back of the PSU and then re-inserted it, at which point I could start the system up again. And once agian it would crash, most often while playing Unreal Tournament 2004 "Carball" mod. Prime 95 also crashed the PC after running for about 1h30mins.
Anyway, thinking the PSU was at fault i returned it once again. This time, the company tested it and said it ran perfectly for 4hrs with no faults. So, upon recieving the PSU back, I duly reinstalled it into the case. After reconnecting all of the cables etc, I pressed the power button. Nothing. Nada. System just won't start at all. And i'm completely baffled as to why.
I have tried plugging in the power connectors to the Mobo (K7N2 Delta ILSR) again, both the 20-pin and the 4-pin one. I have tried pushing in the power switch connector again, and tried reversing it, incase I had it pushed in the wrong direction, I have tried resetting CMOS and setting J10 to safe mode. I have also checked that the CPU cooler is attached and plugged in properly. I am stuck for ideas here, I really am. AFAIK the system hasn't been touched since I took the SPU out, so I'm not sure why it isn't even booting at all at the moment.
If anyone has ANY ideas about this, please don't hesitate to mention, even if it is the stupidest idea you've ever had lol, I'm really stuck with this. I'm thinking of taking everything right out of the case and installing it all again, but I want to know if i've done something really stupid and abvious before I do this. Thanks
BTW, my system specs are as follows.
Zorro PC case AKA Raidmax Scorpio 868
450W Zorro PSU. +5v 25A, +12v 30A
MSI K7N2 Delta ILSR
2x512 Sticks Samsung M3 3,3,3,8 RAM
Power Color Radeon 9800 Pro 128mb
D-Link DWL 520+ 22mbps wireless network
AMD Athlon XP 3000+ 1.65v Stock Settings
Zalman CNPS 6000 CPU cooler @ Max
5xCase Fans
MSI Audio Bracket Thing
40GB Maxtor HDD
60GB Maxtor HDD
Samsung CD-RW and DVD (not writer) 52x48x24x16That was what iI am starting to think now, but there are some problems with that theory. Firstly, when the PSU blew up, after I got the replacement the PC did actually start up, and could run at the desktop for absolubly ages, >10hrs, while playing music and browsing the net, but when running stressful programs it turned off. Also, I tried a less powerful 400W PSU in the system, and that seemed to perform perfectly fine indeed. I also ran Memtest 86+ for a while, it did 6 passes, I think, without problem. I do have other systems, but none of them would support the proccessor or RAM.
I think the problem MUST lie with either one of 3 things.
1) The power button connection has come loose. Although I have checked it on the Mobo I can't actually check it at the power button itself as it is hidden. I might try and multimeter the cable to see if it is connected.
2)The power connectors to the Mobo. These connectors could be broken so the system isn't getting any power. Alternatively it could be the slots on the Mobo.
3)The CPU fan connector. This could be damaged and cetain motherboards don't let the power be started up without the fan being connected. Dunno if the K7N2 series does though.
4)The mobo itself is damaged and won't work.
Whats also puzzling though, is that the system kept shutting itself down and then wouldn't turn on again unless the power plug was removed from the back and reinserted. Any idea why this might happen?
Also, on the components damaged issue. The motherboard should start up without the processor, Ram, Video card etc installed right? Otherwise what is the point of the MSI D-Bracket LED diagnostic system thing? This displays certain LED patterns when the system has a fault, for example a faulty or damaged processor etc. Therefore the systme must be able to get power without a working processor etc. For this reason I think it must be one of the reasons mentioned above. -
HP6310 won't respond to power button, camera light flashes
After turning my HP6310 off by unlugging the power cord, I can't get it to turn back on properly. I plugged the power cord back in and the display lights up blank and the camera light in the front lower left flashes. The power button does not light up and when pressed, does nothing.
Hi @mcdillon99,
Welcome to the HP Forums!
I noticed that your HP officejet 6310 will not respond to the power button, and the camera light flashes. I am sorry to hear this, but happy to help!
I would recommend to go through this guide, The HP Printer Won't Turn On or Respond When the Power Button is Pressed. (Even though the guide title may not match your issue, I believe the solutions will help).
Hope this resolves your issue!
RnRMusicMan
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" to say “Thanks” for helping! -
Power button does not react iMac Core Dua 20"
Hello,
I just purchased an iMac 20" intel Core Duo. I leave the machine to go to sleep during the night. Almost everyday when I want to start the next day my iMac does not wake-up pressing "enter", moreover the power button does not even respond. I have to unplug the power cable and after a few seconds the powerbutton can activate the Mac again. Can anybody help or should I immediately return for repairs?
ErikWelcome to the Apple Discussions.
One question. Is your iMac a Core Duo (no longer made) or a Core 2 Duo?
Try resetting the System Management Controller;
Intel-based iMac, Intel-based Mac mini: How to reset the System Management Controller -
Froze on black screen and power button does not work
my sons ipod touch is stuck on a black screen when plugged into the computer got a spinning wheel and will not connect now spinning wheel will not go away the power button does not work so can not reset it manually
any suggestions would be appreciated- iOS: Not responding or does not turn on
Neglect the reset and when it says place the iPod in recovery mode use one of thes programs
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try on another computer
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
Apple Retail Store - Genius Bar -
My Mac Mini was not sending a signal to the monitor. I powered down using the power button and now it will not start. When i power up I get a strange 2 tone sound, like a warning alarm. The fan starts, and the light comes on, but no screen.
I have tried with a wired USB keyboard and mouse using a single screen. Powered up with option pressed. No change.
Reset SMC no changeRun the Apple hardware test to see what it tells you. Run the extended test when prompted, which can take awhile.
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My iPhone 4 will not power on. When connected to iTunes via my computer, it is recognized and shows fully charged battery. Pressing and holding the sleep/wake button does nothing; just a black screen. Any suggestions?
Only way is to bring it to the Apple Store and use the warranty if it hasn't expired
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