Thursday 13 march 2014 4 13 /03 /Mar /2014 10:31

1.      Turn off your Toshiba satellite L750 L750D L755 L755D. Disconnect the AC adapter and remove the battery.


2.      Remove one screw located in the battery compartment.This screw securing the keyboard bezel.

---.JPG

 

2.      Open the computer. Lift up the keyboard bezel with a small screwdriver. Continue removing the bezel with your fingers. Only plastic clips are holding it into place.
http://i1263.photobucket.com/albums/ii626/laptoppartstore/Toshiba%20C650%20C660/ToshbiaSatelliteC655keyboard-1w.jpg
3.      Remove four screws securing the keyboard.
http://i1263.photobucket.com/albums/ii626/laptoppartstore/Toshiba%20C650%20C660/ToshbiaSatelliteC655keyboard-2w.jpg
4.      Lift the Toshiba satellite L750 L750D L755 L755D keyboard a little or set it back toward the screen to gain access to the connector which is locking the keyboard cable..

5.      Slide the brown locking tab about 1 millimeter towards the LCD screen. Do not separate locking tab from the connector base. Then Pull keyboard cable from the connector.
http://i1263.photobucket.com/albums/ii626/laptoppartstore/Toshiba%20C650%20C660/ToshbiaSatelliteC655keyboard-3W.jpg
6.      Remove the Toshiba Satellite L750 L750D L755 L755D keyboard.

Reverse the procedure to install the new keyboard. You can find the new Toshiba Satellite L750 L750D L755 L755D keyboard here.

 

Relate:

Toshiba satellite L750 L755 Keyboard

Toshiba satellite L750 L755 Fan

Toshiba satellite L750 L755 LCD Cable

Toshiba satellite L750 L755 LCD Hinges

By laptoppartstore - Posted in: Toshiba
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Saturday 1 march 2014 6 01 /03 /Mar /2014 03:51



We will be concentrating on LCD Inverter and CCFL bulb.
Laptop with black screen problem is commonly caused by:

1. a defective backlight, which is the cold cathode fluorescent lamp(CCFL) bulb
2. defective laptop’s inverter board
3. no video output going to the LCD Screen

It is not an easy job repairing laptops specially if we don’t have parts that we can use to replace to the parts we are suspecting to be the culprit. So now, we will going to try to make our own tools for testing a bad CCFL backlight of a laptop.

Tools Needed For this Project:

1. a 9volts battery

2. a 9v battery connector

3. a known good CCFL inverter from any laptop or LCD monitor.

Once you have the tools that we needed, we can continue to the next procedure.

 

Test-inverter-1.jpg

 

About The Video Output:

If the laptop is equipped with an external monitor connector, we can easily check if the problem of having a black screen is caused by a faulty video card or GPU within the laptop or maybe the problem resides inside the LCD which is the inverter and CCFL bulb.
Test-inverter-2.jpg
VGA Port on a Laptop

Connect an external monitor to the VGA Port of the laptop and check if there is a video output to the monitor.

There is some model of laptop that requires you to press a FN key plus a key with a picture of a monitor to switch between the LCD laptop to external monitor.

Then now, if you get a video on your external monitor then you now know there is a LCD screen, CCFL bulb and inverter board problem. If the external monitor doesn’t get any video at all, then suspect a video (GPU) or video cable problem.

Checking the CCFL Bulb:

On checking whether your CCFL bulb if it is still functional, we can use our own known good inverter to test the CCFL bulb is still working or in good condition.

Test-inverter-3.jpg
Known Good Inverter

Using the Known Good Inverter:

Now, with our known good inverter, connect the CCFL bulb. And next, supplies a power to it using our 9v battery. A laptop inverter is usually powered by 12v and up but with our 9v battery, it is just enough to start the circuit of an inverter.
Test-inverter-4.jpg

Connect the black probe from our battery source to the yellow wire, which is usually the 12v supply coming from laptop circuits, but to find more accurately the connection of the power source of an inverter, all you have to do is to find where is the connection of the SMD fuse in the circuit of the inverter. And the black probe to the ground screw hole of the inverter board.If our CCFL bulb lights up like in the picture below, then we now know that our CCFL bulb is good and working and now we can suspect that our inverter board is bad.

Test-inverter-5.jpg


Checking Inverter:

Since that our known good inverter have able to light up the LCD Screen, and then connect the inverter of the laptop back to its position. Then we are going to conduct a test to it using the procedure we did to our known good inverter. And if it won’t lights up the CCFL bulb, then we can suspect that our inverter is defective and needs to be replaced to a new one or simply you can check it if the fuse is open. If it is open, try to make a jumper through the fuse using a thin wire to serves as our fuse, then redo the testing again with same procedure as we use on our known good inverter.

Checking the Power Supply Line:

If our known good inverter light up our CCFL bulb and the Laptop’s inverter also lights up using the 9v battery as its power source, then we are going to suspect the 12 volts power supply line from the laptop’s motherboard.
Test-inverter-6.jpg

Let us get our multitester/multimeter and set it to DC Volts.

Plugged our AC Adapter and turn on our Laptop.

Put the black probe to the ground screw hole on the motherboard and the red probe to the yellow or the supply line and see if you have a voltage reading on that connection.

If you are can’t read any voltages from the connector then let us suspect a problem on the motherboard itself and this needs a lot of knowledge and experience on repairing Laptop.

At this point, we will have to bring the unit to a technician who have the knowledge of repairing a complicated problem of a Laptop.

------------------------------------------------------------------------------------------------------------------------------------------------------------------

Product Link:

LCD Inverter 

CCFL bulb

By laptoppartstore - Posted in: Others
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Wednesday 18 december 2013 3 18 /12 /Dec /2013 09:27

Before removing the HP Envy 17 fan/heat sink assembly, follow these steps:

1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.
4. Remove the battery.
5. Remove Hard drives cover
6. Remove memory module compartment cover
7. Remove the Keyboard.

You can refer to the Post How to Replace HP Envy 17 Keyboard.

 

Remove the HP Envy 17 primary hard drive:

1. Disconnect the primary hard drive cable from the system board.

HP-Envy-17-Fan-1.jpg
2. Use the Mylar tabs to remove the primary hard drive from the computer.

HP-Envy-17-Fan-2.jpg

 

Remove the HP Envy 17 secondary hard drive:
1. Disconnect the secondary hard drive cable from the system board, and then release the cable from the clips and routing channel built into the base enclosure.

HP-Envy-17-Fan-3.jpg

2. Remove the four Phillips PM2.5×6.0 screws that secure the secondary hard drive to the computer.

HP-Envy-17-Fan-4.jpg

3. Use the Mylar tab (1) to lift the rear edge of the secondary hard drive until it rests at an angle.

4. Remove the secondary hard drive (2) by sliding it up and away from the computer at an angle.

HP-Envy-17-Fan-5.jpg

 

Remove the HP Envy 17 memory module:

1. Spread the retaining tabs (1) on each side of the memory module slot to release the memory module. (The memory module tilts up.)

2. Remove the memory module (2) by pulling it away from the slot at an angle.

HP-Envy-17-Fan-12.jpg

 

Remove the HP Envy 17 RTC battery:
▲ Remove the RTC battery from the socket on the system board.
HP-Envy-17-Fan-10.jpg

 

Remove the HP Envy 17 WLAN module:
1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.
NOTE: The 1/black WLAN antenna cable is connected to the WLAN module 1/Main terminal. The 2/gray WLAN antenna cable is connected to the WLAN module 2/Aux terminal.
2. Remove the two Phillips PM2.0×4.0 screws (2) that secure the WLAN module to the system board. (The WLAN module tilts up.)
3. Remove the WLAN module (3) by pulling the module away from the slot at an angle.
NOTE: WLAN modules are designed with a notch (4) to prevent incorrect insertion of the WLAN module into the WLAN module slot.
HP-Envy-17-Fan-11.jpg

 

Remove the HP Envy 17 top cover:
1. Turn the computer upside down, with the front toward you.
2. Remove the four rubber feet (1) from the base enclosure. The rubber feet are included in the Rubber Feet Kit, spare part number 603798-001.
3. Remove the eight Phillips PM2.5×8.0 screws (2) that secure the top cover to the computer.
4. Remove the three Phillips PM2.5×5.0 screws (3) that secure the top cover to the computer in the battery bay.

HP-Envy-17-Fan-6.jpg

5. Turn the computer display-side up, with the front toward you.
6. Open the computer as far as it will open.
7. Release the ZIF connector (1) to which the power button board cable is attached, and then disconnect the power button board cable from the system board.
8. Release the ZIF connector (2) to which the TouchPad cable is attached, and then disconnect the TouchPad cable from the system board.
9. Remove the two Phillips PM2.5×5.0 screws (3) that secure the top cover to computer.

HP-Envy-17-Fan-7.jpg

10. Lift the rear edge of the top cover (1) until it rests at an angle.

11. Remove the top cover (2).

 

Remove the HP Envy 17 optical drive:
1. Remove the three Phillips PM2.5×5.0 screws (1) that secure the optical drive to the computer.
2. Slide the optical drive (2) to the right to disconnect it from the system board.
3. Remove the optical drive (3) by lifting it straight up.
HP-Envy-17-Fan-9.jpg

 

Remove the HP Envy 17 system board:
1. Disconnect the following cables from the system board:
(1) Bluetooth module cable
(2) Display panel cable
(3) USB/Card Reader board cable
(4) Speaker cable
HP-Envy-17-Fan-13.jpg

2. Disconnect the subwoofer cable (1) and the power connector cable (2) from the system board.

HP-Envy-17-Fan-14.jpg

 

3. Remove the two Phillips PM2.5×5.0 screws that secure the system board to the base enclosure.

HP-Envy-17-Fan-15.jpg

 

4. Use the optical drive connector (1) to lift the right side of the system board (2) until it rests at an angle.

5. Remove the system board (3) by sliding it up and to the right at an angle.

HP-Envy-17-Fan-16.jpg

 

Remove the HP Envy 17 fan/heat sink assembly:
1. Turn the system board upside down with the front toward you.
2. Disconnect the fan cable (1) from the system board.
3. Loosen the seven captive screws (2) that secure the fan/heat sink assembly to the system board.

4. Remove the fan/heat sink assembly (3).

HP-Envy-17-Fan-17.jpg
NOTE:The thermal material must be thoroughly cleaned from the surfaces of the fan/heat sink assembly and the system board each time the fan/heat sink assembly is removed.

 

Reverse this procedure to install the HP Envy 17 fan/heat sink and assemble the laptop.

By laptoppartstore - Posted in: HP/Compaq
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Monday 16 december 2013 1 16 /12 /Dec /2013 08:10

Before removing the HP Envy 17 keyboard, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4. Remove the battery.

 

1. Remove the hard drive cover:

  •  Loosen the two captive Phillips screws that secure the hard drive cover to the computer.
  • Pivot the front edge of the hard drive cover upward.
  • Remove the hard drive cover. The hard drive cover is included in the Plastics Kit, spare part number 603795-001.

HP-Envy-17-Keyboard-1.jpg

2.Remove the memory module cover:

  • Loosen the two captive Phillips screws (1) that secure the memory module compartment cover to the computer.
  • Pivot the front edge of the memory module compartment cover (2) upward.
  • Remove the memory module compartment cover. The memory module compartment cover is included in the Plastics Kit, spare part number 603795-001.

HP-Envy-17-Keyboard-3.jpg

 

3. Remove the keyboard:

  • Remove the three Phillips PM 2.5×5.0 screws (1) and the Phillips PM 2.5×7.0 (2) screw that secure the keyboard to the computer.

HP-Envy-17-Keyboard-4.jpg

  • 2. Lift the rear edge of the keyboard (1) until it rests at an angle.
  • 3. Slide the keyboard (2) toward the display until the tabs on the front edge of keyboard disengagefrom the slots in the top cover.

HP-Envy-17-Keyboard-5.jpg

 

  • Release the zero insertion force (ZIF) connector (1) to which the keyboard cable is attached, and then disconnect the keyboard cable (2) from the system board.
  • Release the ZIF connector (3) to which the keyboard light cable is attached, and then disconnect the keyboard light cable (2) from the system board.
  • Remove the HP Envy 17 keyboard.

HP-Envy-17-Keyboard-6.jpg

Reverse this procedure to install the HP Envy 17 keyboard.

By laptoppartstore - Posted in: HP/Compaq
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Friday 13 december 2013 5 13 /12 /Dec /2013 04:06

Toshiba-Satellite-T135.jpg
You can download the guide including pictures here:

 
First of all, turn off your laptop Toshiba satellite T135 / T135D and unplug the AC adapter. Remove the battery.
 
1. Loosen/remove four screws securing the hard drive and memory covers.
Lift up and remove both covers.
   
2. Both memory modules can be accessed on the bottom of the laptop. I will not be removing memory modules because it's not necessary for the purpose of my guide.
Remove two screws securing the hard drive mounting bracket to the laptop base.
Slide hard drive assembly to the left to disconnect it from the motherboard.
 
3. Lift up and remove the hard drive assembly.
As you see, Toshiba Satellite T135/T130 laptop has a regular 2.5" SATA hard drive installed.
  
4. Remove two screws located in the battery compartment.
These screws securing the keyboard bezel.
 
5. Carefully lift up the right side of the keyboard bezel with a sharp object.
Continue removing the bezel with your fingers.
  
6. Remove two screws securing the keyboard.
 
7. Now you should be able to lift up the top side of the keyboard and turn the keyboard upside down.
Be careful, the keyboard still connected to the motherboard.
 
8. The keyboard cable connected to the motherboard.
In the following two steps I explain how to unlock the connector and release the cable.
   
9. On this picture the keyboard connector shown in the locked position.
Carefully lift up the brown locking tab with your fingernail. The tab will open up at a 90 degree angle.WARNING: Do not apply much force! 

10. On this picture the same connector shown in the unlocked position.
Now you can pull keyboard cable from the connector.     


11. Remove the Toshiba satellite T135 / T135D keyboard.
       
12. Remove all screws from the bottom of the laptop.     
 
13. Remove seven screws securing the top cover assembly.
Disconnect the touchpad cable (connector 1) and power button cable (connector 2) using same technique as for disconnecting the keyboard cable.
       
14. Start separating the top cover assembly from the laptop base.
 
15. Remove the top cover assembly.
 
16.On the back side of the top cover assembly you can access the following laptop components:
- Power button board.
- Touchpad.
- Touchpad button board.
 
17. In the following steps I'll show how to remove laptop motherboard.
 
18. Remove two screws securing the motherboard. Disconnect these cables:
-Video cable.
-USB board cable.
-Bluetooth module cable.
-Card reader cable.
-LAN/USB board cable.
 
19. Disconnect both antenna cables from the wireless card.
Remove two screws securing the wireless card.
Remove wireless card.       

20. Carefully lift up the right side of the motherboard and disconnect the DC jack cable.
 
21. Remove the motherboard as it shown on the picture and turn it over.
Disconnect the VGA board connector on the bottom side of the motherboard.

22.The motherboard has been removed.
 
23.On the bottom side of the motherboard you can access the  Toshbia Satellite T135 / T135D cooling fan assembly (fan and heatsink) and CMOS battery.
 
24.You'll find the following components mounting the laptop base:
- VGA board.- USB board.- Both speakers.- Bluetooth module.- Card reader/LAN board.- DC power jack harness.

Reverse the procedure to assemble the laptop.

 

We supply:

Toshiba satellite T135 / T135D keyboard

Toshbia Satellite T135 / T135D cooling fan

By laptoppartstore - Posted in: Toshiba
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  • : Laptop assebmly maintenance guide replacing keyboard instruction replacing CPU fan insturction Technology
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