Laptop Problems

Laptop Not Powering ON

Problem Symptom: When we press power button laptop is not powering ON and no

power indication.

Steps to be followed:

1. Reseat the battery and check

2. Check with other battery and adaptor if it available with same specification.

3. If no go remove battery from laptop and power ON the laptop in AC Mode.

4. Check whether battery charging indication glowing when we put AC Power? If

not then need to replace the mother board

5. Power ON the laptop in minimal Hardware configuration, like remove battery

HDD, ODD and check. If it works insert the above part one by one and check

6. If in minimal hardware also laptop is not powering ON then need to check the

mother board.

No Display/Dim Display

Basic Diagnostic: -

Check the Main Power Supply

Check the power cable

Check the Power Adapter

Check the Battery Power

Check the external display

Extended Diagnostic: -

Open the LCD module and check the inverter Voltages 5-12V DC Voltage at input and

80-100V A/C voltage at out put.

Check the fuse in the inverter

Check the inverter cable

Check the flex cable which is connected to LCD

Check the interface cables between LCD and MBD

Check the MBD

Resolution & Functionality Check:

Need to replace MBD if we are not getting external display also

Need to replace below spares sequencely if we are getting dim display on the screen

1) Inverter Fuse

2) Inverter

3) LCD

Need to replace below spares sequencely if not getting display on the screen but getting

external display

1) Inverter Fuse

2) Inverter

3) Flex cable

4) LCD

POST Error: Incorrect Date & Time

Problem Symptom:  When ever we are powering ON the laptop it is giving date & time

mismatch error

Steps to be followed:

1. Go into BIOS and check whether date and time given properly? If not set correct

Date & Time, save the setting and restart the laptop.

2. Again go into BIOS and check whether corrected setting saved or not? If not then

need to replace the CMOS Battery

3. After replacing CMOS Battery if still same issue, then re-flash or upgrade BIOS

version. Restart the laptop and check again.

4. Still if same problem persists then need to replace the mother board.

Keyboard/Touchpad Issue

Problem Symptom: Internal Laptop keyboard not working

Steps to be followed:

1. Remove keyboard, check for any dust on keyboard cable and mother board

connector. If it works fine well and good else need to replace the keyboard

2. Check any liquid spell on keyboard? If yes then need to replace the keyboard

3. Check with external USB keyboard. If it works fine then replace the keyboard

4. After replacing keyboard still it is not working then need to replace the mother

board.

Problem Symptom: Intermittently touchpad working with very slow

Steps to be followed:

1. Check whether touchpad driver updated properly? If not update touchpad driver

2. Remove touchpad cable and check for any dust with cable end and mother board

part? If yes clean it and Refix the same.

3. Replace touchpad with cable and check.

4. If problem not resolved after replacing touch pad with cable then need to replace

the mother board.

Audio Problem

Problem Symptom: Unable to hear audio from laptop speaker

Steps to be followed:

1. Check whether audio driver installed properly? If not install audio driver and

check.

2. Check the audio setting in control panel and confirm.

3. Connect external speaker in laptop and check whether sound is coming? If sound

is coming with external speaker then need to replace laptop internal speaker

4. If audio is not coming with external as well as internal speaker then need to check

with both Internal Speaker and Mother Board (Note: Some model will have Audio

Controller Board)