Showing posts with label Hardware. Show all posts
Showing posts with label Hardware. Show all posts

Dec 7, 2011

Computer Won't Turn On

  December 07, 2011    

Lots of people got problem in their computer regarding on its turning on. Some reason why computer won't turn on is very easy to fix and easy to know. Now we will discuss the 5 basic reasons why computer won't turning on.

Here are some reasons why computer won't turn on.

1. Power failure. Make sure that the outlet where your computer plug in have electricity on it. You can test it by plugging in electronic devices like electric fan or DVD player. If those devices works, it means there is no problem in electricity.

2. Power chord not tightly plug in. Make sure that the power chord that was plug in the outlet is tight and it is tightly plug in at the back of the computer. This is the common problem that encountered by many computer user. You can plug it out and plug it in again to make sure it is plug in correctly.

3. Faulty Power button. This problem occur if you press the power button of the computer and the computer won't turn on. Based on my experience, it is the power button switch is faulty or its holder inside the computer case is already broken. You can open up the case of your computer to see if the power button switch is already broken. If the power switch holder is broken you can fix it in any means.




4. Faulty Power Supply Unit. If the power supply is not functioning, the computer won't turn on. There is a way to know if the power supply is working or not. Press the power button then look at the back of computer. See if the fan of power supply spinning or not. If not, the poweer supply is the problem. You have to replace the power supply with the new one..

5. Faulty Motherboard. This is the worst reason why your computer won't turn on. This occur when you press the power button and nothing happen. This is the signs of faulty motherboard. The power supply fan is spinning, no bee sound, the fan of processor is spinning and but still the computer won't turn on.

Hope you can pinpoint the reason why your computer won't turn on with this article. If you have question about the computer that won't turn on, you can ask me. I will answer those questions with all my knowledge

  

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Jul 19, 2011

Signal Frequency is out of range

  July 19, 2011    

Problem:
This "Signal frequency is out of range" problem is cause of incompatible monitor
plugged in your computer. If you replace the monitor, this error will display. I
encouter these problem mostly when I replace LCD monitor and not easily recog-
nized by the computer.

Solution:
1. Uninstall the VGA driver through device manager. Right click My Computer
    from the Desktop and choose Properties.



2. System Properties will pop up. Click Hardware tab and click
    Device Manager button.



2.Device Manager will pop up. Locate Display adapter. Right click on it.
   Choose Uninstall.




















4.Uninstall dialog box will pop and  choose to uninstall the driver.
5. After you uninstall the VGA driver, install it again.
6. You can download the VGA driver of your motherboard on the
    internet. If you have the CD of your motherboard driver, insert it
    on CDROM drive and install it.

This procedure will solve the Signal frequency problem of your computer.

  

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Jul 11, 2011

Mouse wheel not working

  July 11, 2011    

Problem
I install new optical mouse to our one HRD staff to replace her old mouse.
I open up one excel files to test the mouse. I notice that all buttons of mouse
is working except its scroll. I thought the mouse is defective but when I tried
to use it in other computer, its scroll is functioning. It seems like there is
problem on the configuration of mouse on that computer. I tried to check the
configuration and here's all the method I have done.

Solution
1. Click the Windows Logo at the bottom and choose Control Panel.




























2. Control Panel will pop up. Click the mouse.

















3. Mouse Properties dialog box will appear, click Hardware tab.
    Then click Properties button.

4. Microsoft PS/2 Mouse Properties will appear. On Wheel
    detection, choose Assume wheel is present in drop down
    list. Then, press Ok button.




























After doing this procedure, open Microsoft Word document and
try the wheel of the mouse if it is working.

  

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May 31, 2011

Electronic Projector display no signal?

  May 31, 2011    

Scenario:
I set up computer in our conference room. I plug the electronic projector
cable to the dedicated video card. I turn on the electronic projector first
and then the computer. After a few minutes, the electronic projector
did not display anything even the booting up of the computer. It only display
no signal. I check the cables and restart the computer again. But it only
display no signal. It sounds like there is a problem, its either the computer
or the electronic projector. This is the procedure I made.

1. I check the electronic projector if it search automatically the computer
    that was connected to it. I press the search  button on it then restart
    again the computer. But nothing happen.

2. I think that there might be a problem in the computer. I suspected
    that there is a problem in my dedicated video card. That's why
    I open up the case of the computer and check the video card.
    I notice that there is a blown capacitor on it. I removed the
    video card and plug the vga cable into the built in vga adapter
   of the motherboard. I turn on the computer and now it boots up
   normally. The electronic projector is display the Windows operating
   system.

  Look at the picture below. This is the capacitor I have seen in my
  video card.


  

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May 25, 2011

Troubleshooting loop boot problems

  May 25, 2011    

What is loop boot?

Loop boot is a term used when a computer keeps on restarting automatically.
You will notice that when you turn on your computer and Windows logo appear
but does not continue to load the operating system but instead it automatically
restarting. It will not stop to restart unless you turn off the computer.

Possible causes of Loop Boot

There are lots of possible causes of loop boot. Here are some list that
I was already encountered.

Video Card
Defective video card is the possible caused of loop boot. If your desktop
computer have dedicated video card, try to remove it and plug the vga
cable from your monitor into the built in vga adabter. Your computer will
use the built in vga graphics of thethe motherboard and your computer
will work normally.

Lan Card
Normally desktop computer have built in LAN adapter on its motherboard
but some pc use lan card for some purposes. If the LAN card is defective
it also make your to restart automatically.Remove your LAN card and turn
on your computer.

Corrupted Operating System
Possible reason was the Windows operating system is corrupted. To fix
this problem, you have to reinstall the operating system.
Hard disk problem
Loop boot could be caused by your hard disk. If your hard disk have
bad sector ,files within the hard disk would be corrupted. Fix this problem
by using your Windows operating system installer or you can make that
hard disk to be slave in other computer and perform checkdisk utility.

Memory Card
A defective memory card can cause loop boot on your computer. Remove the
memory card and replace it with the good one.

  

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May 20, 2011

Causes of Blue Screen problems

  May 20, 2011    

Blue Screen is also known as Blue Screen of Death (BSoD). It is called Blue
Screen because it display only blue color in computer monitor with its error
message when the operating system of the computer experiencing a problem
with its software or hard. BSoD also display the possible reason why its
happening to your computer. BSoD appears when there is incompatible
software and hardware that was installed in the computer.















<


Here are some possible causes of BSoD.

Defective Power Supply Due to over heat.

         Someone called me up from HR Department and told me that
her computer monitor display only blue color with error message. As,
I went to check her computer, all I can see in her monitor was BSoD 
error.

I open the system unit and look for any possible reason why this error
appeared. I touched the power supply  inside the system unit and 
it feels so hot. I removed the power supply from system unit and open it 
up. The two fans of power supply was already stock up. That's the time
I decided to replace it with the new one and install it. When I turn on the
computer, the BSoD is now gone. I concluded that power supply cannot
supply the electricity needed by the computer to function normally that is 
BSoD comes up. 

Incompatible Memory Module
            I installed additional  memory to one of our computer in our
production office to upgrade it. I turned on the computer and BSoD displayed
on monitor. I suspected that the cause of BSoD was the memory I have installed.
I remove the memory and turn on the computer. The BSoD  is gone. It means
that the memory I installed was not compatible to the motherboard.


Hope my experience regarding BSoD will help you to identify the problem
that trigger the BSoD error.

  

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May 1, 2011

Usb device does not show up in My Computer?

  May 01, 2011    

Have you experience to plug in your Flash drive or any usb device in your computer and it doesn't show up in my computer?

Recently I experience this problem.I plug in my Flash drive, then it was detected by my pc. Unfortunately, I can't see any removable storage in my computer. I plug in my Flash drive in other pc but it was detected and showed up in my computer. It means that there is a problem in my pc. I search the internet to fix this problem and find a solution for that problem. Here are the steps.

Procedure:
 1. If you are using Windows XP, Click Start and click Run.
     If you are using Vista/Windows 7, click the Windows Logo at the bottom left.


2. Type regedit, then press Enter. 

3. Registry Editor will pop up.Navigate to the following registry key:
    HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

4.Under HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices there will
   be registry keys with the name  that resembles the format of \DosDevice\E:
    where E can be any alphabet letter which corresponding  to your physical system
    drive letter. Normally storage devices use E or F depending on how many partition
    you have in your hard disk.
  

5. Delete the DosDevice\E: registry keys that represent any USB or FireWire
    storages devices connected on the system before.

6. Now insert and plug in the USB or FireWire device into the port again. The
    drive letter for the USB and   FireWire should now appear and you can use
    the drive normally again. If this procedure won't solve your problem, kindly
    post a comment here and i will give you the other solution.

  

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