The laptop turns on, power LED lights up, cooling fan works but nothing appears on the screen. The screen is completely black and blank. There is no image on the screen at allThis can be memory failure. It is possible one of the memory modules failed. In this case you can try reseating memory modules to make sure they are making good contact with the slot. You can try removing memory modules one by one and test the laptop with only one module installed. You can try replacing memory modules.If reseating/replacing memory does not help, try removing the hard drive, DVD drive, modem, wireless card, keyboard, etc. In other words, disassemble the laptop to bare minimum and test again. If the laptop still doesnt turn on, most likely you have failed motherboard or processor. .
The laptop turn on without showing any image on the screen. After a few seconds it turns off by itself. Then it turns on and off again.Most likely this is motherboard failure. You can try reseating/replacing memory . If it does not help, probably the motherboard failed.
The laptop turns on and everything works fine, except it makes some constant weird grinding or rattling noise.In most cases this noise is coming from the cooling fan or hard drive. Take a closer look at the cooling fan.If the fan does not spin but the the laptop makes noise, probably it is coming from the hard drive. Back up all personal data as soon as possible and replace the hard drive.Also, you can remove the hard drive and start the laptop. If the laptop still makes noise, most likely it is bad fan.
The battery stopped charging properly. It does not charge at all or charges only after you adjust the position of AC adapter plug inside the power connector.If it does not charge completely try reconnecting the battery first. Also, try running the laptop just from AC adapter with battery removed. If it runs fine from AC adapter, most likely it is either bad battery or failed motherboard. Try replacing the battery first. If the battery charges only after you adjust the position of AC adapter tip inside the connector, most likely this the DC jack failed.
The laptop turns on properly but has a distorted or garbled image on the screen.The graphics card failed. First of all, test your laptop with an external monitor or TV. If you see the same garbled image on the external screen, most likely the graphics card failed. If the problem appears only on the laptop screen, this can be related to one of the following either poor connection between the video cable and motherboard or screen. Also can be failed video cable or screen.
When you plug the AC adapter into the laptop, there are no lights turning on at all. When you push on the power button, nothing happens. The laptop appears to be completely dead, makes no sounds, no indications of life.The AC adapter failed and the battery has no charge left. In this case test the AC adapter with a voltmeter. If it is dead, replace it with a new one. If the DC jack has failed and the motherboard does not receive any power from the adapter. In this case the DC jack has to be replaced .If the motherboard has failed then the motherboard has to be replaced, if it is not too expensive. Otherwise get ready to buy a new computer.
The laptop starts properly but after a while the screen light turns off. The image still appears on the screen but it is very dark.In some cases the screen light never starts and all you can see is a very faint image.Most likely it is either failed screen inverter or backlight lamp (CCFL) failure. When either one fail, the backlight stops working.In order to troubleshoot this, you will need some spare parts either new working inverter or known good backlight lamp.
The laptop runs properly but after a while it freezes or shuts down without any warning. When it happens, the bottom feels hot. Also, the cooling fan runs louder than usual.Most likely this is heat related issue. It happens because the fan heat sink is clogged with dust and the processor not cooling down properly. Cleaning the fan and heat sink from dust should fix it.Most likely this problem is heat related.Any laptop has a cooling module which includes two parts: the heat sink and cooling fan. When it works, the processor (CPU) heats up and the heat sing heats up too. At some temperature level, the fan kicks in and cools down the heatsink.The problem starts when the cooling module collects too much dust inside. The dust kills normal airflow inside the cooling module. Eventually, the processor overheats and the laptop turns off unexpectedly or freezes.Some laptops give you an easy access to the heatsink and fan. In laptops like that you can access the cooling module through the bottom cover.