1. Laptop Repair
PC Repair and Troubleshooting

2. Laptop battery not charging properly
• Problem description:
– The laptop battery stopped charging properly. It’s not charging
at all or charges only after you adjust the position of AC adapter
plug inside the power connector on the laptop.
• Possible problem:
– Failed battery. If the battery stopped charging completely try
reconnecting the battery first. If it doesn’t help, remove the
battery and try running the laptop just from AC adapter. If the
laptop runs fine from AC adapter but doesn’t charge the battery
at all, most likely it’s either bad battery or motherboard
problem. Try replacing the battery first.
– Loose DC power connector. If the battery charges only after you
adjust the position of AC adapter tip inside the connector, this is
DC jack related problem.

3. Laptop doesn’t turn on at all
• Problem Description
– 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.
• Possible problem
– AC adapter failed and the battery discharged completely. First of
all, test the AC adapter. If it’s dead, replace the adapter.
– DC jack separated from the motherboard (or DC jack broken)
and the laptop doesn’t get any power from the AC adapter. In
this case the DC jack has to be replaced.
– Laptop motherboard failed. If that’s the case, most likely the
laptop not worth fixing.

5. Laptop has strange or garbled image
on the screen
• Problem description:
– The laptop turns on properly but shows bad, wrong or
garbled image on the screen.
• Possible problem:
– Graphics card failure. First of all, test your laptop with
image output on the external monitor. If you see the same
problem on the external screen, most likely this is graphics
card related failure.
– If the problem appears only on the laptop screen, it could
be related to one of the following: poor connection
between the video cable and motherboard or LCD screen
or failed video cable or failed LCD screen.

6. Screen light doesn’t work or fails while
the laptop running
• Problem description:
– The laptop starts properly but after a while the screen light
turns off. The image still appears on the screen but it’s very
dark. In some cases the screen light never starts but you
still can see a very faint image on the screen. In all cases
the laptop video appears to be fine on the external
monitor or TV.
• Possible problem:
– Most likely it’s either the screen inverter or screen
backlight lamp (CCFL) failure. Both fail very similarly
causing the screen light to go off. In order to troubleshoot
this kind of failure effectively, you’ll need some spare
parts: either new working inverter or known good
backlight lamp.

8. Laptop turns on but screen is blank
• Problem description:
– The laptop turns on, LED lights on the laptop turn on, cooling fan
works but nothing appears on the screen. The screen is completely
black and blank. There is no image on the screen at all, not even a very
dim image.
• Possible problem:
– This problem could be related to the memory failure. 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 memory module installed. You
can try replacing memory modules with new modules.
– If reseating/replacing memory modules doesn’t 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 doesn’t turn on, most likely you have failed motherboard or
processor.

10. Laptop turns on and off repeatedly
• Problem description:
– The laptop turn on without showing any image on the
screen. After a few seconds the laptop turns off by itself.
Then it turns on and off again. It continue turning on and
off repeatedly until you power off the laptop completely.
• Possible problem:
– Most likely it happens because of some kind of
motherboard failure. You can try reseating/replacing
memory. If it doesn’t help, this is a possible motherboard
related failure. In most cases it’s not worth replacing the
motherboard, better to buy a new laptop.

11. Laptop makes noise while running
• Problem description:
– The laptop turns on and everything works fine, except it makes some constant
weird grinding or rattling noises. Some laptops make noises all the time, other
laptops have them intermittently.
• Possible problem:
– In most cases this noise is coming from the cooling fan or laptop hard drive.
You can turn on the laptop, wait until it starts making noise and after that
listen closely on the bottom of the laptop. If the laptop starts making noise
when the cooling fan starts running, most likely you have a failing fan. Replace
the cooling fan.
– If the laptop makes noise even when the fan not spinning, probably it’s
coming from the hard drive. Back up all personal data from the hard drive as
soon as possible, it can fail any moment. Replace the hard drive.
– Here’s another technique to figure out if the noise coming from the fan or
hard drive. Remove the hard drive from the laptop and start the laptop. Wait
until it warms up and the fan starts spinning. If the laptop still makes same
noise even when the hard drive removed, most likely it’s bad fan.

12. Laptop turns off or freezes while in use
• Problem description:
– The laptop turns on and runs properly but after a
while it freezes or shuts down without any warning.
When it happens, the laptop feels hot on the bottom.
Also, the cooling fan works harder than usual.
• Possible problem:
– Most likely this is heat related issue. It happens
because the cooling module gets clogged with dust
and the laptop cannot “breath” properly. The laptop
shuts down or freezes because the processor (CPU)
overheats. Cleaning the cooling fan and heatsink
should fix the problem.

13. Some laptop keys stopped working
• Problem description:
– The laptop turns on and runs properly but some
keyboard keys do not work at all or type wrong
characters.
• Possible problem:
– Most likely this the keyboard failed. Laptop
keyboards are not repairable. If some keys
stopped working, you’ll have to replace the
keyboard.

14. Missing or broken keys on laptop
keyboard
• Problem description:
– A key got separated from the laptop keyboard.
• Problem solution:
– If a key got separated from the keyboard, it’s still
possible to fix it without replacing the entire
keyboard. Hopefully you didn’t damage the key
hinges.
– If you have many keys missing, probably it makes
sense to replace the whole keyboard.

15. Hinges
Retainer Clips
Cap Color

16. Laptop makes repetitive beep sound
on start-up
• Problem description:
You turn on the laptop but there is no video
on the screen. Instead, the laptop makes
repetitive beeping sound. You can “fix” the
problem if you press on the keyboard keys.
• Problem solution:
Most likely it happens because there is a stuck
key on the keyboard. In this case you’ll have to
replace the keyboard.

17. Liquid spilled on laptop
• Problem description:
You spilled something on the laptop and it’s
stopped working.
• Problem solution:
Liquid spills are very dangerous and
unpredictable. If it happened, turn off the laptop
ASAP, remove the battery and do not use it until
all internal parts are inspected for liquid damage.
It’s sill possible the laptop will work again after
you clean the damage.

18. Laptop pointers are not working
properly
• Problem description:
– Touchpad, pointing stick is not working or moving drastically
• Possible problem:
– Touchpad is disabled so enable it using hot key or it is dirty so it
can’t make good contact with your finger or the settings are
incorrect. Control Panel -> Mouse -> Check / Edit the settings
– Driver not updated
– Software Issue. Reboot keep pressing F8, if the device works in
Safe Mode, but not in normal Windows mode, it may be a
software issue. Remove any mouse related software & reboot. If
doesn’t work, go to device manager, remove all listed device in
mouse. Shutdown, open load up to windows, new hardware
wizard should appear and load the required drivers
– Hardware Issue

19. Laptop USB ports are not working
• Problem Description
– USB couldn’t read the external device
• Possible Problem
– External device is broken or a write only device
– If the device works in another computer but not on
your laptop. Use Map network drive
– Driver not updated. Control Panel -> Device Manager -
> USB Controller
– Software Issue. Reinstall USB Port