Lenovo thinkpad edge e420 screen replacement

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Page 13 Chapter 1 Safety information Page 19 Chapter 1 Safety information Page 20 Hardware Maintenance Manual Page 21 Chapter 1 Safety information Page 22 Hardware Maintenance Manual Page 23 Chapter 1 Safety information Page 24 Hardware Maintenance Manual Page 26 Hardware Maintenance Manual Page 27 Chapter 1 Safety information Page 28 Hardware Maintenance Manual Page 29 Chapter 1 Safety information Page 30 Hardware Maintenance Manual Page 31 Chapter 1 Safety information Page 32 Hardware Maintenance Manual Page Chapter 2.

Page 36 1. Click the Parts Detail tab to view the list of service parts. Page Chapter 3. Some descriptions might not apply to your particular computer. Page 39 Configuration utility for DOS. Page Lenovo Thinkvantage Toolbox Web site. Page Uefi Diagnostic Program F12 key. Press the Tab key to switch to the Application Menu window. Use the arrow keys to select Lenovo Diagnostics and then press Enter. The main screen of the UEFI diagnostic program is displayed.

Attach the USB device to the computer. Turn on the computer. Page Checking Operational Charging Voltage V dc Ground 20V Note: Output voltage across pin 2 of the ac power adapter might be different from the one you are servicing. If the voltage is not correct, replace the ac power adapter. Hardware Maintenance Manual Page Chapter 4. Restoring the factory contents by using Recovery Disc Set When the hard disk drive HDD or solid state drive is replaced because of a failure, no product recovery program is on the new drive.

Page Passwords c. Press F10 to save the ThinkPad Setup configuration changes. Follow the instructions on the screen to begin the recovery process. If it has, it can be used for access to the hard disk drive. If no master HDP is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master HDP, or to recover data from the hard disk drive. Page Power Management 1. Select Security, using the cursor directional keys to move down the menu.

Select Password. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens. If you have defined one of the following actions as the event that causes the system to go into hibernation mode, perform that action. Page Lcd-Related Symptoms If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.

Page 54 2. Visually check each FRU for damage. Replace any damaged FRU. Remove or disconnect all of the following devices: a. Non-ThinkPad devices b. Printer, mouse, and other external devices c. Battery pack d. Hard disk drive e. External diskette drive or optical drive f. If a battery is installed on the computer, it is charged when this indicator is on.

Page 56 Table 6. Status indicators continued Indicator Meaning Sleep standby The illumination dot in the ThinkPad logo on the outer lid of the computer and on the status palm rest works as a system-status indicator: it shows whether the computer is in sleep standby , hibernation, or normal model. Page Chapter 6. Special Keys The computer display becomes brighter.

The purpose of this method is to change the F8 brightness level temporarily. To change the default brightness level, change the settings of the Power Option in the Control Panel or use the Power Manager.

Page 58 Table 7. Special keys continued Description Special key Wireless radio control Enables or disables the built-in wireless networking features. If you press this key, a list of F9 wireless features is displayed. You can quickly change the radio state of each feature in the list. Page Chapter 7. See your Lenovo Limited Warranty documentation for full details.

Page Retaining Serial Numbers If you replace the system board, you must restore the serial number of the system unit to its original value. Before replacing the system board, save the original serial number by doing the following: 1. From the main menu, select 4. Assign UUID. A new UUID is created and written. If a valid UUID already exists, it is not overwritten. Page 62 Hardware Maintenance Manual Page Chapter 8. After you finish the servicing, make sure that you insert the card back into the slot firmly.

Difficulty Moderate. Steps Time Required 25 - 30 minutes. Sections 3. Flags 0. Introduction If you need to replace the screen, use this guide to access and remove the screen on this device. Tools Buy these tools. Step 1 Hard Drive. Add a comment. Add Comment. Step 2. Step 3. Step 4. Step 5. Step 6 Top Case. Step 7. Step 8. Step 9. Step Step 13 Glass Screen. Almost done! To reassemble your device, follow these instructions in reverse order.

You're Finished! Author with 2 other contributors. Single Step Full Guide.