Scenario 1 The laptop seems to be dead. Plug the power adapter but the LEDs (power light, hard light unit, the battery charge light, etc) and the laptop will not turn at all if you are responding to press the power button. control, especially in this situation, the power supply. You can check the output voltage with a voltmeter. If not, you can find a known good power adapter and use it to test the laptop. It is possible that the laptop appears to be dead, because the power supply is bad (and the battery is discharged). If you know that the power supply is functioning and outputs correct voltage but the laptop is still dead, the more likely it will be a question of power on the motherboard (or power board replaced in some laptops) and be. If you replace the power supply, make sure you have right. The output voltage must be exactly the same as the original adapter. The output current should be the same as the original adapter or higher, but not less. Scenario 2 If you recharge the AC adapter the power LED and battery light on the plug. When started by pressing the button on the laptop, but did not start. No video on LCD or external monitor. If the LED is lit, this means that the laptop is always current from the mains. There’s probably nothing wrong with the adapter, but only if tested with a voltmeter to ensure that the output voltage is correct. Also to prove this. Disconnect the power to remove the battery and wait 1-2 minutes. Then plug the power adapter from the laptop to try again. Sometimes this trick helps. It could also be a problem with memory. Try replacing the memory module, just out of its slot on the motherboard and reinstall. Install the memory module into the slot of another type (if available ¯ s). If you install two memory modules, try to install one by one and restart the laptop with the memory module only. If the laptop starts with a memory module in both slots in order, but not with the second memory module in both slots to start the second defective memory module. Replace the module. If the laptop starts fine with both memory modules when installed in slot A, but not with two memory modules in slot B Start is installed, the defective slot B ¯ ll the motherboard or a memory slot to replace. Scenario 3 Pressing the power button on the laptop or a series of long and short beeps and will not start. No video on screen. In this situation, testing the memory module as I described in the situation2. Try a known good memory module. Probably you are always a sound error due to a faulty memory. Situation 4 Start the laptop. It seems that the laptop will start normally (HDD LED flashes), but no video on the screenIn this situation, test the laptop with an external monitor. If the external display works fine, but no video on the laptop LCD screen, there is probably a problem in the portable display unit. Go to my previous post witch covers laptop video problems details. Starts fifth laptop and starts making repetitive clicking or grinding. You’ve probably heard that noise, because a defective hard disk. You can remove the disk and restart the laptop without it. If the noise is gone, the hard drive of your problem. Replace it. Clicking on the laptop or grinding noises and you still have the video screen, you can create a test drive program lasts. I usually use Hitachi Drive Fitness Test ¯ s. This test is reliable and easy to use. Location sixth laptop boots Windows to work for a while, but after that it shuts down for no reason or warning. seems to restart the laptop but the problem itself is likely againMost ¡° sa heat related problem. Watch for the fans, make sure it works. Again, this problem might occur due to a faulty memory module, try some tips from the second situation the laptop even the boots you can still see the screen so you can run the memory test. I usually use Memtest86 +. Run to test memory if that fails, replace the defective module. 6The situation laptop starts normally but video on the screen has lines could defectsIt some strange characters, or other problem with the laptop LCD screen, video cable, video card or motherboard. Here ¯ s my previous post witch troubleshooting bad images on the screen in more detail.

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