Computer has complete loss of power.When you plug the AC adapter into the laptop there are no lights turning on at all and power button doesn’t work.
Possible problem
– The AC adapter failed and the battery has no charge left.
– DC jack failed and the motherboard doesn’t receive any power from the adapter.
– Motherboard failed. The motherboard has to be replaced, most times this is cost prohibitive
Problem 2:
Blank LCD screen
The laptop turns on, power LED lights up, cooling fan works but nothing appears on the screen.
Possible problem
– This can be memory failure. It’s possible one of the memory modules failed.
– Hard drive, motherboard,video card/controller or defective monitor.
Problem 3:
Laptop turns on and off repeatedly.
The laptop turns on without showing any image on the screen, auto reboot loop occurring.
Possible problem
– Motherboard failure, failing driver, possible memory issue or even overheating condition may be present.
Problem 4:
Laptop making noises while running.
The laptop turns on and everything works fine except it makes some constant weird grinding or rattling noise.
Possible problem
– 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 doesn’t spin but the the laptop makes noise it’s likely the hard drive making noise.
– You can also remove the hard drive and boot the laptop. If the laptop still makes noise most likely it’s a bad fan.
Problem 5:
Laptop shuts down or freezes.
The laptop runs properly but after a while it freezes or shuts down without any warning. Bottom is very hot.
Possible problem
– 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. Also a bad fan.
