Lenovo U300E manual Removing and replacing an FRU

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Lenovo IdeaPad U300e Hardware Maintenance Manual

Removing and replacing an FRU

This section presents exploded figures with the instructions to indicate how to remove and replace the FRU. Make sure to observe the following general rules:

1.Do not attempt to service any computer unless you have been trained and certified. An untrained person runs the risk of damaging parts.

2.Before replacing any FRU, review “FRU replacement notices” on page 31.

3.Begin by removing any FRUs that have to be removed before the failing FRU. Any of such FRUs are listed at the top of the page. Remove them in the order in which they are listed.

4.Follow the correct sequence in the steps to remove the FRU, as given in the figures by the numbers in square callouts.

5.When turning a screw to replace an FRU, turn it in the direction as given by the arrow in the figure.

6.When removing the FRU, move it in the direction as given by the arrow in the figure.

7.To put the new FRU in place, reverse the removal procedures and follow any of the notes that pertain to replacement. For information about connecting and arranging internal cables, see “Locations” on page 53.

8.When replacing an FRU, use the correct screw as shown in the procedures.

DANGER

Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any of the interconnecting cables.

Attention: After replacing an FRU, do not turn on the computer until you have made sure that all screws, springs, and other small parts are in place and none are loose inside the computer. Verify this by shaking the computer gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge. Before touching it, establish personal grounding by touching a ground point with one hand or using an electrostatic discharge (ESD) strap (P/N 6405959) to remove potential shock reasons.

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Contents Lenovo IdeaPad U300e First Edition Oct Copyright Lenovo 2011. All rights reserved Contents About this manual Safety information General safety Electrical safety Lenovo IdeaPad U300e Hardware Maintenance Manual Safety inspection guide Grounding requirements Safety notices multilingual translations Safety noticeLenovo IdeaPad U300e Hardware Maintenance Manual Safety information Lenovo IdeaPad U300e Hardware Maintenance Manual Safety information Lenovo IdeaPad U300e Hardware Maintenance Manual Safety information Laser compliance statement Safety information Important service information Strategy for replacing FRUsStrategy for replacing a hard disk drive Important notice for replacing a system boardImportant information about replacing RoHS compliant FRUs General checkout Following are not covered under warranty What to do firstPower system checkout Checking the AC adapterChecking operational charging Lenovo IdeaPad U300e Hardware Maintenance Manual Related service information Restoring the factory contents by using OneKey RecoveryPasswords Power-on passwordSupervisor password Power management Screen blank modeSleep standby mode Hibernation mode Specifications Lenovo IdeaPad U300eSpecifications Status indicators Status indicatorsFunction key combinations HotkeyFRU replacement notices Screw noticesRemoving and replacing an FRU Base cover Removal steps of base coverLenovo IdeaPad U300e Hardware Maintenance Manual Battery pack Removal steps of battery packHard disk drive Removal steps of hard disk driveDimm Removal steps of DimmPCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless LANWhen installing Fan assembly and Heat Sink assembly Removal steps of fan assembly and heat sink assemblyLenovo IdeaPad U300e System board Important notices for handling the system boardRemoval steps of system board Lenovo IdeaPad U300e Hardware Maintenance Manual Speakers and microphone Removal steps of speakers and microphoneRemoval steps of the speakers and microphone LCD unit Removal steps of LCD unitWhen installing Keyboard and keyboard bezel Removal steps of keyboard and keyboard bezelM2 × 3 mm, flat-head, nylok-coated Black M2 × 5 mm, flat-head, nylok-coated Black Lenovo IdeaPad U300e Hardware Maintenance Manual Locations Front viewRight-side view Bottom and Left-side viewParts list Overall Parts list-Overall No. FRU FRU noLenovo IdeaPad U300e Hardware Maintenance Manual Parts list-Keyboard KeyboardLenovo IdeaPad U300e Hardware Maintenance Manual Parts list-Miscellaneous parts Miscellaneous partsParts list-AC adapters AC adaptersPower cords Parts list-3-pin power cords145000525 145000553 Parts list-2-pin power cords UK 2PINLenovo IdeaPad U300e Lenovo IdeaPad U300e Hardware Maintenance Manual Trademarks