LED on the power button always on

Hello
I have ProBook 4540s. when it is switched (complete shut down not sleep or hibernate) the LED of the Power Button is stay on. I tired to remove the battery and replace it again and nothing still on. Please how to solve this issue? and does this issue will affect the device in any way?
Operating System Windows 7
Thanks,
Abu Anas

Hi AbuAnas,
To get your issue more exposure I would suggest posting it in the commercial forums since this is a commercial product. You can do this at Commercial Forums. You could try to update the BIOS.
Thanks.
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G5 won't boot. White LED lights when power button is pushed, click heard.

Unlike some other non-booting G5 stories, mine never makes it past this stage. It's a dual 1.8ghz G5 powermac.
The white LED above the power button turns on when the power button is pressed, a click is heard, but it does not go any further. The LED does not flash at all... no grey screen, no hard-drive access, nada.
When I push the power button with the aluminum side removed (but with the transparent insert in place), I can see the fans twitch like they are going to start spinning, but then immediately stop.
I've tried resetting the PMU, replacing the PRAM(CMOS) battery, another identical type of video card, blowing out the dust with compressed air, removing and swapping memory, but always get this same result.
There was some renovation done in the house recently, but the machine was gently wrapped and moved away from the work. However after 2 weeks of sitting there, it now won't start.
Any help is appreciated. If the 'clicking' of the power supply is being heard (also clicks when I plug in the power cord), does that mean the power supply is likely working? In which case, is it likely a logic board issue?
One thing I noticed upon closer inspection, after removing the main fan, is that the higher processor seems darker than the lower one. Is there a way to remove one processor to test for hardware failure?

Hi subculture,
A power supply is not to difficult to replace. The lower processor must be removed. It is much easier to lay the Mac on its side. A used power supply can be found on ebay. There are 2 main power connector that connect to the logic board. Those can be tested with a DC voltage meter against a pinout chart for your particular model and can be found on google.
Powermac G5 2004 Model
Power Supply P1 Connector
Pin# Signal Color ------ Pin# Signal Color
1 +5Vstb Purple --------- 13 GND Black
2 GND Black ------------- 14 Power ON Green
3 FANtach White/Yellow -- 15 GND Black
4 GND Black ------------- 16 Reserved
5 Reserved -------------- 17 GND Black
6 GND Black ------------- 18 RTNaud(GND) Black
7 +12Vaud (12V2) Yellow - 19 GND Black
8 GND Black ------------- 20 +5V sense Red
9 +3.3V sense Orange ---- 21 GND Black
10 GND Black ------------ 22 -12V Blue
11 GND Black ------------ 23 GND Black
12 Reserved ------------- 24 Reserved
Power Supply P2 Connector
Pin# Signal Color ------- Pin# Signal Color
1 +3.3V Orange ----------- 9 +5V Red
2 +3.3V Orange ---------- 10 +5V Red
3 +3.3V Orange ---------- 11 +5V Red
4 +3.3V Orange ---------- 12 +12V3 Yellow
5 Reserve --------------- 13 +12V3 Yellow
6 +12Vfan Yellow -------- 14 +12V1 Yellow
7 +12Vfan(12V2) Yellow -- 15 +12V1 Yellow
8 +25V White ------------ 16 RTNfan(GND) Black
Power Supply P3 Connector
Pin# Signal Color ------- Pin# Signal Color
1 +5V Red ---------------- 5 +5V Red
2 GND Black -------------- 6 GND Black
3 GND Black -------------- 7 GND Black
4 12V2 Yellow ------------ 8 +12V2 Yellow
Regards

My hp Pavilion p6230y died. It will not boot. The power button LED does not lite.

The power supply LED is lit, and all the voltages are correct (metered). The fans turn on when the power button is pressed, and I can feel the HDD turning and it gets warm. I stripped the system down to bare essential, nothing but wireless keyboard & mouse, HDMI connector to monitor. I cleaned out all the dust from inside the computer.I reseated the CPU chip. No beeps at all coming from motherboard. The CPU heatsink is stone cold. I suspect either CPU chip &/or motherboard. Anybody have any ideas?
This question was solved.
View Solution.

Usually when the fans twitch it means that the CPU is OK. That is not a theory, it is practical experience. My next step is what I suggested to you. Clear the CMOS settings. That is usually a last ditch effort. I always have a spare PSU around to verify that it is not the culprit.
Follow the troubleshooting on this HP web document to check your PSU. Just testing it with a meter does not help much because it can fail under load. The multimeter does not put a load on the power supply unit. Even those cheapie PSU testers are pretty worthless, except for a cursory test.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Always need Disconnect power, press the power button wait for 10 seconds...

I bought a HP computer for a couple of years ( Pavilion a6695it ) It always works well. But in recent days, I can not start up it. I tried pressed power button on the front of the computer, nothing happend. Then I searched in hp site. finnally, I find this article http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00241069&tmp_task=solveCategory&cc=it&dlc=it&lc...
In english version the article is here:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&cc=us&destPage=document&lc=en&product=3...
Power supply light is on or flashes
Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:
CAUTION:This product contains components that are easily damaged by ElectroStatic Discharge (ESD). To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (like a conductive foam pad), and wear an ESD wrist strap that is connected to a grounded surface, like the metal frame of a PC.
Disconnect everything from the computer, including the power cord.
With the power cord disconnected , press the power button on the front of the computer and wait for ten seconds.
This is work for me. But now, my computer always need this methond that it can be started up.
Disconnect power -> press the power button and wait for ten seconds -> then the system will start up
So my question: where is the problem? Which part is broken and i should replace? Thanks.
regards,
Youli
This question was solved.
View Solution.

Hello youlichika,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that you are not able to power on your desktop, and I would be happy to assist you in this endeavor!
In following the document for Troubleshooting Power Supply Issues, were you able to follow steps 3-9? If so, what were the results?
If you have come to the end of the document, and you still have to drain the power from the computer to power it on, you can find a replacement part (5188-2627) through one of the sites available by following this link.
I hope this helps!
Best Regards
MechPilot
I work on behalf of HP
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Satellite S45-ASP4310SL doesn't turn on, after pressing the power button, a LED blink

Mi laptop Toshiba Satellite doesn't turn on anymore, THIS MODEL DOESN'T ALLOW ME TO REMOVE THE BATTERY, everytime I lift my finger from the power button the white LED light blinks, I've tried pressing for 30 seconds and a bit more and doesn't works, I've been using this laptop for more than a year, 2 days ago I leave it charging while gaming and go to the bathroom, when I head back, it was turned off and doesn't charge neither.
Please help me, and excuse me for my bad English

Hello.
Do you have any security passwords set for your hard drives?
There was a user that reported a similar problem with his machine a couple of weeks
ago, and it turned out to be tied to the HD password he had set. When he turned the
password off, the machine booted normally.
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HT1414 i think my iphone 4s has a damaged software because it locks the phone always and powers it off without touching the power button. how can i rectify this problem?? i already tried erasing all the settings and content of the phone. thanks..!

i think my iphone 4s has a damaged software because it locks the phone always and powers it off without touching the power button. how can i rectify this problem?? i already tried erasing all the settings and content of the phone. thanks..!

This is a user to user help forum only. You are not addressing Apple here.
My iPhone 4S, iPhone 5, and iPad 2 are running 6.1.3 with no such problem and the same with the overwhelming majority of iOS devices running 6.1.3.

I've tried safe mode but I dont understand what is happening. I tried pressing the power button on and off for several times and nothing happens, I'm always stuck on an apple logo and a spinning wheel. I dont know how to get to the Partition and the DiskU

I've tried safe mode but I dont understand what is happening. I tried pressing the power button on and off for several times and nothing happens, I'm always stuck on an apple logo and a spinning wheel. I dont know how to get to the Partition and the DiskUtility. The Apple Logo and the Progress Indicator will continue to spin and I have literally no idea what to do. i am in desperate need of help. help me pls

Turn it off.
Start it up again and (at the sound of the chime) press and hold the command and the R keys, hold them down until Recovery loads. When it does you will select Disk Utility and you should be on the First Aid tab when it opens, if you are not please select it. Then select the partition (in the side bar, 2nd entry on the list, see picture).
Yours is probably called Macintosh HD.
Once you have selected it go to the lower righthand corner of the First Aid dialog and press Repair Disk.
This will take 10 minutes approximately. Post back when it is finished and tell me what it says.

I've tried safe mode but I dont understand what is happening. I tried pressing the power button on and off for several times and nothing happens, I'm always stuck on an apple logo and a spinning wheel. I dont know how to get to the Partition

I've tried safe mode but I dont understand what is happening. I tried pressing the power button on and off for several times and nothing happens, I'm always stuck on an apple logo and a spinning wheel. I dont know how to get to the Partition and the DiskUtility. The Apple Logo and the Progress Indicator will continue to spin and I have literally no idea what to do. i am in desperate need of help. help me pls

Reboot hold the command R for recovery.

P35 Platinum: I have to press the power button multiple times to start

Hello fellow MSI customers,
as written in the subject, I have a problem with starting my PC. When I press the power button, the computer powers on, but there is no output to the screen. In fact, my LCD stays in standby mode. I can hear the fans running, so something is going on. According to the LEDs on the mainboard, it is a memory problem.
Now I turn the computer off, using the power button (have to hold it for a few seconds). When off, I start again and everything runs as it should.
After starting, I ran memtest86 multiple times without any errors. I ran a few games, compiled some programs, installed Vista 64bit, Linux, all without any crashes or hangups. It is just the starting that makes problems. After booting it is very stable.
Seeing that it could be a memory problem, I brought another pair of memory, just to be sure. I couldn't reproduce the problem on that day! Any type of memory I put in (the one before, or the newly brought home) the computer always started on the press of the button. So I thought, OK, maybe they were not seated correctly. But, alas, two days later it is again only starting by pressing the power button three times.
What I tried:
1. Boot using only 1 piece of memory stick
2. Boot using only 1 piece of memory, but different one
3. Use another pair of memory <- worked, but on that day it also worked using my original memory
4. Disconnected everything except graphics card, to make sure it is not a power supply issue (minimized power usage)
5. Tried all of the above with a different processor
6. Used another power supply
Any other ideas?
Here are my specs:
MSI P35 platinum
Core2 Q6600
Nvidia 7900GT
4GB V-Data DDR2 800MHz <--- I think this is the problem, any experiences?
Enermax Liberty 400W
a few other things (HDDs, XFi, DVD-RW)
By the way, how can I boot from an external DVD-RW? It doesn't show in the menu when I press F11 (boot menu).
Thank you for any help, muro
And just to let a bit of steam off:
1. I had major problems with the RAID controller (not MSI fault, rather intel) - I put two disks into a RAID 0, then RAID 1 and they always failed after a few boots - member missing on both disks. I was getting angry, so I put them as normal (non RAID) disks and everything is fine since, although no RAID.
2. Installing anything except windows with an IDE DVD-RW is very hard. It took me ages until I got Ubuntu booting (there are guides on the net, google is your friend), and much longer to get grub (boot loader) working. Long story short - if you have multiple disks, use the Linux disk as the bootable, do NOT put grub on the disk where Vista is installed.
3. I have no idea, how to update the BIOS, if I had to. I'm using 1.1 that came on the board. I use 64bit Vista and Linux, none of which is supported to upgrade the BIOS. Any hints how to do it (if I needed to)?

Hello,
now today is the day I've finally received my replacement board. The good news first - it DOES work! Yepeeee!
Now some more information:
The jmicron controller seems to be missing - a screen with something about "Marvel" is shown before the intel raid screen. However, it is only visible for a fraction of second, so I cannot read it. I think it detects my IDE DVD-RW so I'm quite certain it's the replacement for jmicron. I won't miss it - it took me ages to install Linux with the jmicron controller.
The problem where I had to restart the computer sometimes because it didn't even post (RAM error) is gone. It boots just fine now.
I had an extremely long first post - about a minute, but after that it boots very fast now.
anyway, regarding some questions around here - the manual states MSI recommends using an 350W power supply. My 400W is more than enough. Please note - it is an Enermax, not one bundled with a cheap case. My cheap RAM sticks also work very well now. I did try them on different boards before, so now I know I just had a faulty board.
In the end, I can only say this: This is my 3rd board already and it's the first one that works well. As the hardware changed, I presume there were major issues with this board that lead them to make a new revision. What is strange, though, is that the revision is still 1.1, as were my previous two. I pity everybody who had the same problems as I did, but I can now say that I'm very happy about the board now.
Cheers, muro

Everytime I start up my Mac mini I'll be able to use it only for a little while then the beach ball appears and it won't let me do anything I have to keep forcing it to turn off by holding the power button can someone help me?

I have no external devices connected to my Mac mini but still everytime I use it after about half hour to an hour in whatever I'm using wether it's the Internet or iPhoto or iTunes the beach ball appears and I cannot get it to stop I always have to press and hold the power button and force it to switch off I then do a safe reboot and it starts up again fine but same thing again after a certain amount of time it will freeze. I have also had on some occasions a bright white screen with a folder and a flashing question mark appear but it's not because of any external devices as they have all been removed please can someone help me as I have no idea why this keeps happening to my computer and I'm worried that there's something seriously wrong it's only about 6 months old and I have no experience in dealing with computers ??

EtreCheck version: 2.1.8 (121)
Report generated 13 February 2015 15:33:46 GMT
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    Mac mini (Late 2012) (Technical Specifications)
    Mac mini - model: Macmini6,1
    1 2.5 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1600 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1600 MHz ok
    Bluetooth: Good - Handoff/Airdrop2 supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    Intel HD Graphics 4000
        LG TV spdisplays_1080p
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:11:35
Disk Information: ℹ️
    APPLE HDD ST500LM012 disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 499.25 GB (398.54 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ℹ️
    Apple Inc. BRCM20702 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Configuration files: ℹ️
    /etc/sysctl.conf - Exists
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /Applications/AVG AntiVirus.app
    [loaded]    com.avg.Antivirus.OnAccess.kext (2015.0 - SDK 10.8) [Click for support]
Launch Agents: ℹ️
    [running]    com.avg.Antivirus.gui.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [running]    com.avg.Antivirus.infosd.plist [Click for support]
    [running]    com.avg.Antivirus.services.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins: ℹ️
    Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Default Browser: Version: 600 - SDK 10.10
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         5%    WindowServer
         1%    AVG
         0%    AppleSpell
         0%    fontd
         0%    cloudpaird
Top Processes by Memory: ℹ️
    215 MB    com.apple.WebKit.WebContent
    125 MB    avgd
    107 MB    Safari
    90 MB    Messages
    69 MB    WindowServer
Virtual Memory Information: ℹ️
    171 MB    Free RAM
    1.68 GB    Active RAM
    1.53 GB    Inactive RAM
    637 MB    Wired RAM
    1.34 GB    Page-ins
    2 MB    Page-outs
Diagnostics Information: ℹ️
    Feb 13, 2015, 03:20:28 PM    Self test - passed
    Feb 6, 2015, 08:08:07 PM    /Library/Logs/DiagnosticReports/Kernel_2015-02-06-200807_[redacted].panic [Click for details]

I did a factory reset on my late 2008 MacBook from a Snow Leopard disc. It installed fine, but as soon as I began to use the computer (safari) it froze. Couldn't even force quit. So I held down the power button to turn it off, and now it won't start up.

I did a factory reset on my late 2008 MacBook from a Snow Leopard disc. It installed fine, but as soon as I began to use the computer (safari) it froze. Couldn't even force quit. So I held down the power button to turn it off, and now it won't start up. It goes to the grey Apple screen and just sits there loud as can be. Help! Please keep in mind I've not done anything like this before and am going to need a little hand-holding. Thanks in advance.

Hi. Don't worry it's nothing serious. Insert the Instal Disc (Snow Leopard) and press the C button while turning on the computer. Once you see the desktop, go to Utility and choose Disk Utility. Select the Macintosh Partition on the left window pane and then click on Repair Disk and Repair Disk Permissions on the bottom right corner. Wait for both processes to finish. Click on the Apple icon (top left corner) and choose quit. Your computer should restart. See if it reboots normally. If not you can always reinstall the OS following the same steps. Good luck!

My macbook pro will not start after pressing the power button

I have bought a macbook pro last year and now, I have a great problem since a few months.
My macbook does not boot up, I hear no fan noices and no LED lights are blinking...
Battey is full, but nothing happens (means system will not start up).
I have also tried to start with the Power button - but the similar effect "NOTHING HAPENS".
What I don't understand is, if I do nothing for one or two days and press then the power button, the system will start up and full functionality for a few days.
And anytime I get the same problem again... and must wait also for a few days.
Can anybody support me please.
Thank you all in advance and looking forward to a fast reply.

Try reseting SMU as suggested in link below
http://support.apple.com/kb/ht3964
Allan

Satellite A660 How can i turn off the lighting of the power button?

Hello, I recently bought a new Toshiba A660-1FL.
However bothers me is the lighting of the multimedia keys, if I work in the dark.
In Bios I could turn off the led illumination, but the power on/off button is still lighting,that distracts me when i am working.
This notebook has two power LED, so the power on lighting is in my opinion, unnecessary.
My question is: How can i turn off the lighting of the power button?

Here you can see the LED with the same function in front of you: http://s3.imgimg.de/uploads/t009aae62jpg.jpg
Yes in fact, the difference is color, design, but also location and brightness of the LED.
For me, this LED is too bright and it is distracting in the dark, as you can see here: http://s3.imgimg.de/uploads/leddf570760jpg.jpg
I was today at a local electronics store, and saw that Toshiba has the brightest Power LED on A660, but why it must be placed under the LCD and not in the front as in my old notebook Toshiba A210.
I also had the idea with a tape, but it would look ugly, and it must be removable without residue.
P.S. Also the fingerprints on the glossy keyboard do not look nice.

Why does Satellite Pro A300 not start when the power button is pressed?

Suddenly my new Satellite Pro A300 will not start correctly when the power button is pressed. The situation is this: When I press the power button the Toshiba opening picture (Leading Innovation) appears and disappers quickly. Then there is a black screen for about 30 seconds. Then there is a rectangular frame with the text Microsoft Corporation underneath. And nothing happens however long I wait.
In order to get on with the starting proces I then shut down the computer by pressing down the power button until the computer stops. ("The hard way to shut down")
Now I press the power button shortly to turn on the computer. Then the computer starts normally with the Toshiba opening picture and after a few seconds I am asked to open the computer in safe mode or in normal mode. I now choose to open in normal mode and the computer opens normally and is ready to work.
What shall I do to get a normal start procedure?

When notebook starts normally (after choosing normal mode) shut down your notebook properly using START > Shut down option. Next start should be normal.
When the OS is switched down on irregular way you will be always asked how to start it again (safe or normal mode).
The same happen on my Satellite A300.

Red lights behind the power button

In reading through some posts last night I got the impression that I should be paying more attention to the lights inside the box, behind the power button, when booting (or I should say attempting to boot) my dual-core G5 PowerMac.
My observations this morning are that I see a big red light when the machine is first powered up from cold, and also when it is restarted. That goes off. A few seconds later, before the chime, I see a brief, much smaller red light flash in that same area. Almost a pinpoint.
Is that normal, or is it diagnostically significant?
(As noted in my earlier post today, I'm launching a final effort to fix this sick puppy before I give up and take it down to the Apple Store, but it needs to be a campaign of controlled baby steps.)
TIA,
Kathi

Hmm, on second thought I'm not so sure... but I don't have time to open the thing up right now and figure out exactly where each of those LEDs is. The drawings in that article and in my manual aren't terribly helpful.

LED on the power button always on

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