Question about IBM ThinkPad T20 2647 Notebook

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Power switch problem

My computer does not switch on

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To actually solve yr problem, you troubleshoot by trying the following:
* use a multimeter to test the power adapter if its working well. u can as well do this by using a flexible cable touching one end of the cable in the middle pin(+) of the power that is d dc area then the other part of the flex cable on the outside (-) it should spark which shows its working well.
* remove yr battery from the laptop n plug in direct ac to it then power on. if not on yet
*try to check the port where u plug in power to the laptop n see if its still firm to the board if yes
*meet a professional then
thank u

Posted on May 23, 2008

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Plz check your power supply unit

Posted on May 21, 2008

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1 Answer

Power supply light flashes green then red


Power supply problems can be common in Hewlett Packard desktop computers, particularly older models.
While it is unsettling to find that your computer will not power on, it is often a simple problem that you can fix yourself.
Even if you cannot resolve the issue, you may be able to pinpoint it for the repair technician, thereby saving the repair shop time and yourself money.

Plug in a lamp to check to that the electrical outlet is live.
You can also plug the computer into another outlet.
Unplug your computer from any power strips or surge protectors and plug directly into the wall to see if these devices could be the problem.
Disconnect the power cord and any peripherals from your computer.
Press the power button and hold for five seconds.
Plug the power cord back in to see if the computer will now power on.

Disconnect the power cord and locate the red voltage selector switch on the back of your computer.
Push the switch in the opposite direction and wait five seconds.
Flip the switch back as failing to do this may damage the computer.
Plug the power cord back into the computer and electrical socket, and turn the computer on.
Power up the computer after removing all externally attached peripherals except for the monitor, keyboard and mouse.
Remove any recently installed internal components such as video cards, hard drives or memory modules.
If the machine powers on after this, the problem may be that the added devices need more power than your computer can deliver.
Upgrading the power supply should fix the problem.

Disconnect the power cord and press the power switch.
If it does not operate smoothly, you may need to replace it.
If it functions normally, it may have disconnected from the motherboard.
Put on an anti-static wristband to prevent static electricity from affecting the components inside your computer.
Remove the two or three screws on the back of the CPU to release the side panel.
You will either need a Phillips-head screwdriver or a flat-head screwdriver depending on your model.
For the entire outer case, you will have at least two screws on each side and two or three in the back.
Once you have removed these, you will be able to either slide the side panel off or pull back the entire casing.
Locate the color-coded wires from the back of the switch and trace them to the motherboard.
If one or more wires have disconnected from the motherboard, re-attach them manually to the connectors located on the motherboard.
http://h10025.www1.hp.com/ewfrf/wc/document?dlc=en&lc=en&product=425925&lang=en&cc=us&docname=bph06788 - bph06788_section_2

Jul 08, 2013 | HP Pavilion g6-2210us Laptop PC

1 Answer

Can I swich off my TV when using as a computer monitor


I don't think so. It's like shutting down a Desktop with a Monitor, Both have to be switched off. They have two power sources, two AC plugs. Unless you put all plugs on a power strip ,with a on/off switch, and switch off at the power switch.

Apr 07, 2013 | PC Laptops

1 Answer

The screen of my Vaio flickers when the charger is plugged in and the computer is switched on. If the computers switched off it charges ok and the screen is good when the charger not plugged in.


TRY SWITCHING OFF YOUR COMPUTER MONITOR( REMOVE THE POWERCODE). IS THE PRON SOLVER. IF YES PROB WITH MONITOR POWER SECTION. IF NO REMOVE POWER OF COMPUTER CPU. AND ON THA UPS . IF IT IS STILL FLICKRING PROBE WITH UPS. ELSE RE[PLACE SMPS OF COMPUTER

Feb 07, 2011 | Sony VAIO VGN-CR420E/T Laptop

1 Answer

Gateway mx6448 Notebook will not power on, Red LED flashes 4 times when power on button is pressed then nothing happens. It is the same with only the battery. LED will not flash if I have only the power...


There can be many things associated with no power to the computer.
  • The outlet into which the computer is plugged may be inoperative.

  • The surge protector you are using may be inoperative.

  • The power cable may be loose or damaged.

  • An internal device may be damaged.

  • The power supply may be inoperative.

Basic Troubleshooting Power to the Computer
There may not be a consistent flow of power to the computer.
  1. Verify that the outlet into which you are plugging the computer is operational.

  2. If you have the computer plugged into a surge protector, plug it directly into the outlet.

  3. Verify that the power cable is plugged securely into the back of the computer.

  4. If you have a monitor with a removable power cord, swap the power cords between the monitor and the computer.

Note: If you recently added a new hardware device prior to experiencing the no power issue, turn off the computer and remove the newly added hardware. If there is still no power, reseat all the other cards and cables in the computer to verify that all other devices are seated securely.
Resolving Power Supply Issues
  • External Device Conflicts
  • There may be an external device causing the computer not to turn on properly.

    1. Before continuing, verify your computer is turned off.

    2. After you have established that adequate electricity is going to your computer, verify that the voltage switch on the back of the power supply is set correctly. The small red switch is to be set to the 115-volt setting.

    3. Remove all external devices except the monitor and turn on the computer. If the fan on the back of the computer now spins, turn off the computer. Plug in the external devices one at a time and turn on the computer after each device is added.

    4. Note: If you removed all external components and the fan on the back of the computer does not spin, the problem is with something inside the computer.

  • Internal Device Conflicts
  • This helps determine if the issue is a damaged or badly seated component.

    1. Verify that the computer is turned off.

    2. Remove the case from the computer.

    3. Remove all the red, yellow, and black power connectors from each floppy disk drive, CD-ROM drive, and tape backup unit that is in the computer. The only devices connected to the power supply are your hard disk drive and motherboard.

    4. Turn on the computer and verify that the fan on the back of the computer spins. If it does not spin, turn off the computer.

    5. Remove the power connection from the hard disk drive and reconnect power to one floppy disk drive. Turn on the computer and verify that the fan on the back of the computer spins.

    6. Reseat the power connection from the power supply to the motherboard. Turn on the computer and verify that the fan on the back of the computer spins. If the power has been restored, turn off the computer and reconnect the power connections to the devices. Test the computer for power after reconnecting each device.

  • Power Switch
  • The power switch may not be functioning properly.

    1. You may need to open the case and readjust the power switch.

    2. Locate the control panel inside the computer and remove any screws holding it in place.

    3. Turn on the computer with the control panel removed by pressing the button on the control panel that corresponds to the power button. If the power supply fan spins and/or the computer turns on, put the control panel back in its place. Try to turn on the computer again.

  • Test Switch and Diagnostic LED
  • Note: Not all power supplies have a test switch and diagnostic LED.
    Certain power supplies have a test switch and LED to help better troubleshoot the device. The green LED is always on when the computer is powered on. If the computer is not receiving power please perform the diagnostic test below.

    1. Verify that the computer is turned off.
    2. Remove the case from the computer.
    3. Remove all of the red, yellow, and black power connectors from each floppy disk drive and ROM drive and the tape backup unit (TBU) that is in the computer. Remove all power connectors from the motherboard. The only device that needs to be connected to the power supply is the hard disk drive.
    4. Press and hold the test switch for five seconds on the power supply, and then verify that the green light on the power supply comes on.
    5. If the light comes on:
      1. The power supply is good and something that was plugged into the power supply is causing the computer to not turn on.
      2. Plug devices in one at a time, testing with the test switch between each device to determine what is causing the power issue.
      3. If all devices are plugged in and the light is working, the connections may have needed to be reseated, or it is possibly a power switch issue.
      4. Go to the power switch section of the power supply checklist for additional troubleshooting steps.

    6. If the light does not come on:
      1. Disconnect the power from the hard disk drive, and then plug in power to the CD-ROM drive and determine whether the light comes on.
      2. If it does, follow the preceding information - "If the light comes on."
      3. If the light still does not come on, contact Gateway Technical Support.

    7. Confirm that power from the power supply is connected to the motherboard. Remove all cards and cables from the motherboard, and press and hold the test switch for five seconds on the power supply and determine whether the green light-emitting diode (LED) comes on.
    8. If the LED comes on, put the devices back in one at a time, testing between each device to determine what is causing the issue.



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Dec 02, 2010 | Gateway MX6448 Notebook

1 Answer

Power connection light is orange?


Hi,

Three possible work arounds/fixes:
1. Plug the computer into a power strip that has an on/off switch. Turn the power strip on. Press the computer power on button to start as normal, but after after one second turn off the power strip switch just long enough for the fans on the computer to slow down, but the amber computer led doesn't turn off and then turn the power strip switch back on. Computer should start and run fine. Computer typically can be shut down for up to 5 minutes and restarted normally--any longer and you have to sue the power strip power switch routine again.

2. Remove the cmos battery for about one minute and then replace. This fix may last for months but problem will return.

3. If either of the above fixes work and computer starts, press the F2 key (usually, could be F12 on some models) when computer screen first comes on and before Windows starts to load. Select the BIOS setup option and reload the default settings --you will have to change any of the settings that chanhged due to upgrades and changes that you have made to the base computer. Note that the a common default BIOS setting includes a floppy drive check even when the computer doesn't have a floppy drive and this setting has to be changed to 'none' typically. This one is not for the faint of heart!


Please post your feedback and Vote if the problem resolved as per your satisfaction.

Sep 19, 2010 | PC Laptops

1 Answer

My a.c. Power supply plug at the computer broke. Can I get another power supply?


Yes you can, just make sure that the switch mode power supply you purchase has the same wattage or greater wattage that your old switch mode power supply.

May 14, 2010 | PC Laptops

1 Answer

The screen is blank but notebook is running


Try pressing the [Fn] + [external monitor] keys on the keyboard, that should switch your computer to the right monitor setting.

If that doesn't work,
1) Power off your computer.
2) Open the lid to about 30 degrees, just enough to reach the power switch still.
3) Leaving the lid partially open, press the power switch to power it up.
4) After the operating system is running the lid can be opened completely.

If you are still having troubles, unplug the power cord, remove the battery pack, then hold down the power button for 30 to 60 seconds. Then reattach the power and attempt a boot. After doing this, shutdown your computer and put the battery pack back in.

Hope this helps!

Email me if you have any other problems,
g33kg1rl7@gmail.com

Feb 12, 2010 | Toshiba Satellite A75-S229 Notebook

1 Answer

I have medion akoya s5610 laptop. Power light bottom left comes on when conected but nothing else happens, just black screen, no attempt to boot.No light on power button either


  1. Believe it or not, the number one reason why a computer won't turn on is because it wasn't turned on!
    Before starting a sometimes time consuming troubleshooting process, make sure you've turned on every power switch and power button on your computer:
    • Power button/switch on the front of the computer
    • Power switch on the back of the computer
    • Power switch on the power strip, surge protector, or UPS (if you have one)
  2. Verify that the power supply voltage switch is set correctly. If the input voltage for the power supply does not match the correct setting for your country, your computer may not power on at all.
  3. Check for disconnected computer power cable connections. A loose or unplugged power cable is one of the top reasons why a computer doesn't turn on.
  4. Perform a "lamp test" to verify power is being provided from the wall. Your computer isn't going to turn on if it's not getting power so you need to make sure that the power source is working properly.
    Note: If you have a multimeter or another electrical testing device you are welcome to use that to test your wall outlet (and power strip, surge protector, etc.). The lamp test is useful if you don't have an electrical testing device.
  5. Test your power supply. At this point in your troubleshooting, it's very likely that the power supply unit in your computer is no longer working and should be replaced. You should however test it just to be sure. There's no reason to replace a working piece of hardware when testing it is fairly easy.
    Replace your power supply if it fails your testing.
    Important: In the huge majority of cases when a computer isn't receiving power, a nonworking power supply is to blame. I bring this up again to help stress that this troubleshooting step should not be skipped. The next few causes to consider aren't very common.
  6. Test the power button on the front of your computer's case. It's not a very common point of failure but your computer might not be receiving power because the power button on the front of your PC is damaged and is not actually turning your computer on.
    Replace the power button if it fails your testing.
  7. Replace your motherboard. If you're confident that your wall power, power supply, and power button are working, it's likely that there is a problem with your PC's motherboard and it should be replaced.

Nov 27, 2009 | Medion md40298 Notebook

1 Answer

Power switch pushed in


Power switch is pressed and then a circuit operates in similar way as RELAY works.

But due to internal brush or transistor failures this can't retain its proper power and hence you computer doesn't look working good.

So please change it and its very cheap also...

Rate this solution if it was helpful to you.

With Regards,
Shyny

May 29, 2009 | Gateway MX6927 Notebook

1 Answer

Does not power up


It's a dreadful way to start a day - you press the power button on your computer and nothing happens. Do not fear because all may not be lost! Follow these simple steps to determine why your computer won't turn on.

Note: It is very important to troubleshoot any issue beginning with the most likely and easily testable problem so be sure to follow these steps in order.
Difficulty: Average
Time Required: Anywhere from 10 minutes to a few hours or more depending on why the computer won't turn on
Here's How:

As silly as it may sound, the number one reason why a computer won't turn on is because it wasn't turned on! Before starting a sometimes time consuming troubleshooting process, make sure you've turned on every power switch and power button associated with your computer:
Power button/switch on the front of the computer's case.
Power button/switch on the front and/or back of the monitor.
Power switch on the power supply on the back of the computer.
Power switch on the power strip or surge protector (if you have one).

Verify that the power supply voltage switch is correctly set. If the input voltage for the power supply does not match the correct setting for your country, your computer may not power on.

Check for loose computer and monitor power cable connections. A loose or unplugged power cable is one of the top reasons why a computer doesn't turn on.

Perform a "lamp test" to verify power is being provided. Your computer isn't going to turn on if it's not getting power so you need to make sure that the power source is working properly.

A damaged power supply could be preventing the computer from being properly powered.

Do a quick test of the power supply by holding your hand behind the power supply fan located at the rear of the case. If the power supply is working, you should feel air from within the case blowing against your hand. If not, you may need to replace the power supply.

Tip: Is the power light on the front of the computer's case on? If you've turned the power switch on but the light is off, this is another good indication that the power supply is the cause of this issue.

Over time, internal components and the cables that connect them can wiggle loose which can often times result in a computer unable to power on. Try reseating the following and then try to power on the computer again:
Reseat the internal cables
Reseat the memory modules
Reseat the video card
Reseat other expansion cards

Reseating the CPU may also be necessary but should only be attempted if the reseating of all other components is not successful. This is due to the fact that this process is a little more involved and can run a small risk of damage to the CPU. This isn't a big concern if you're careful, so don't worry!

Check for causes of electrical shorts in the computer case. This is often the cause of the problem when the computer powers on for a second or two but then powers off completely.

Most monitors have a small light next to the power button that can change between various colors. If the screen is blank, this light is your main source of information about the monitor.

If this light is not on at all, double-check the power switch and connections (Steps 1, 2 and 3) and also make sure the monitor cable is securely plugged in to the video card port on the back of the computer case. If the light is still off, replace the monitor. If it comes back on, try starting your computer again - a loose or unplugged monitor cable may have been the issue all along.

An amber or yellow power light simply means that the monitor is not receiving any information from the computer. In and of itself, this doesn't tell us much.

On the other hand, if the light is amber or yellow, the computer power light is on, and the hard drive is active (making familiar sounds and the hard drive activity light on the computer case is blinking), the computer is probably starting normally but the video card is not sending information to the monitor. Replace the video card.

Beep codes (see Step 11) usually sound when a video card has malfunctioned but this is not always the case.

Is your computer making a beeping sound? Sometimes a computer will turn on just enough to play a series of beeps from the speakers.

These beep codes play in particular sequences and represent a specific problem that your computer is having. Troubleshoot the beep code to figure out what it's saying and then service the computer as necessary.

Let us know how things turn out and don?t forget to rate the posting.

Jan 27, 2008 | IBM ThinkPad T22 2647 Notebook

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