how to test laptop lcd screen

when you buy a new laptop or buy a replacement laptop LCD screen panel,you must want choose no dead pixel (burned pixel),no light pixe Lcd screen panle.who like trouble?but if you have not specialized LCD test Software,you would read our article.It does not matter,I tell a good way to you,
Operating system has been installedClick the “Start” → “Run”,input”command”(Windows 9X/Me operating system) or “cmd” (Windows NT/2000/XP operating systems),at this time,the “Command Prompt” window be open.input”debug “and click”enter”key.the screen will show “?”,the laptop run debug application.pushing”Alt+Enter”,Maximized windows fill the entire screen for test laptop Lcd screen.
Operating system has not been installedReboot your laptop ,enter DOS,input “debug”and click”enter”key.the screen will show “?”,the laptop run debug application.
input command“F B800:00 F9F 20 70”Full-screen white，* P1 I2 o* ^0 j& ^0 T. V$ U& ~’ C“F B800:00 F9F 20 40”Full-screen red，! h. U0 V4 A” y: ” `” b6 _“F B800:00 F9F 20 20”Full-screen green，! `3 b4 M- ]1 p6 N. G“F B800:00 F9F 20 10”Full-screen blue.
add gridding
“F B800:00 F9F C5 07 C4 07”Full-screen white gridding， {8 c/ 8 C9 k! t” g“F B800:00 F9F C5 04 C4 04”Full-screen red gridding，, l: m& J( d’ Z0 G Q! d“F B800:00 F9F C5 02 C4 02”Full-screen green gridding，/ I0 N/ V- k- Q/ x ?+ M“F B800:00 F9F C5 01 C4 01”Full-screen blue gridding.the way is very convenient. we do not need install test software,but also we achieve the purpose of testing.. t: y, h9 W, X. Q2 T$ [; G$ u/ ]+ L9 `4 {7 J6 g( ?$ ~
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Dream laptop IBM ThinkPad W700

A colleague of my bought a new laptop , IBM ThinkPad W700.
I think it is a laptop not only in my dream. Let us share it now, what special of it?
Appearance looks nothing special, the same as other IBM laptop.
Open it, a 17′ screen and a writing panel you will see.
Side of the screen will give you surprises!
You will not feel its presence, when the side of screen closed.
We are look at the location of writing stylus.
The following are the parameters of its
Main Display: 17 inch, 1920 × 1200Vice-display: 10.75-inch, 768 × 1200 (5.5 × 9.25 inch)Processor: Core 2 Extreme QX9300 2.53GHzMemory: 4GBHard Disk: 460GBCard: Quadro FX 3700MProfessional digital drawing board: 5-inch Wacom DigitizerVideo Output Interface: VGA, DVI, DisplayPortOther interfaces and adapters: all-in-one card reader, Express64, FireWire 1394, USB 2.0 × 5, ModemOperating System: Windows Vista 64-bit
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How to search and replace your Laptop Motherboard

How to search and replace your Laptop Motherboard?when your laptop motherboard has suffered a irreparable damage,your laptop will not boot up or some functions of your laptop stop working intermittently.you just only geting a new laptop motherboard and disassemble your laptop and manually replace the laptop motherboard with a new one.today,laptoppartwholesale.com tell you How to search and replace your Laptop Motherboard?at first,what is laptop motherboardThe Laptop motherboard is a large,Printed circuit board that is used to connect all of the different components on a laptop.
You will need the following tools to complete the removal and replacement laptop motherboard■Magnetic screwdriver■Phillips P0 and P1 screwdrivers■Torx8 screwdriver■Flat-bladed screwdriver
Setp 1:
Search and Buy a corresponding replacement laptop motherboard
Navigate to the support website of your laptop or check the user’s manual for got the part No of motherboard your laptop uses.some model’ parts number is locatedon the bottom of your laptop.you will go to ebay or www.laptoppartwholesale.com and buy a corresponding replacement laptop motherboard.Power off the your laptop and close the lid of screen .overturn the laptop computer so that the bottom is facing up toward you. Hold down the battery’s latch and then remove the battery.
Setp2:
Remove all of the screws from the bottom of the case. swing it up and to left the two plastic covers near the middle of the case that protect the hard drive and RAM modules. Pull off the hard drive directly out of the case and set it aside. Grab both ends of the exposed RAM module and remove it from the case . Repeat the process with the second RAM module if your particular model of laptop has a second memory module.
Setp 3:dismantle the disc drive on the left side of the laptop directly out of the case and set it aside. Turn the computer back over and open up the screen’s lid. Push a flat object, such as a screwdriver head, underneath the large plastic piece above the laptop keyboard that houses the indicator lights and power button. Pop the plastic piece off the laptop. Disconnect the cable connecting the plastic piece to the laptop motherboard.
Setp 4lift down the laptop keyboard from the case and then disconnect the cable connecting it to laptop motherboard. Remove the screws holding the LCD hinges to the case. Slide the card from its port on the Laptop motherboard and set it aside.lift down the laptop hinges and set them aside. Locate the network card at the left end of the laptop motherboard.
Step 5Remove the screws holding the graphics card to the laptop motherboard if your model of laptop has an extra graphics adapter. Slide the card off the laptop motherboard and set it aside. Remove the screws holding the laptop fan and heat sink unit to the laptop’s processor. Remove the them and then pull the processor off its motherboard socket. Set both pieces aside.
Step 6Pull out the screws along the edges of the motherboard. Lift the motherboard straight up and remove it completely from the laptop’s case. Line up the ports on the sides of the new laptop motherboard with the corresponding holes on the case. Push the motherboard down into the case and reconnect the screws.
Step 7Reassemble all of the internal parts you removed to get to the laptop. Set the plastic piece and keyboard back onto the case. Replace the battery and then reconnect the hard drive, disc drive, RAM modules and plastic covers. Replace all of the screws. Power on the HP laptop and wait for the operating system to load completely to make sure the motherboard is working.
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