Lenovo N200 Checking the ac adapter, Checking operational charging, Checking the battery pack

Page 33

Checkout guide

Checking the ac adapter

You are here because the computer fails only when the ac adapter is used.

vIf the power-on indicator does not turn on, check the power cord of the ac adapter for correct continuity and installation.

vIf the computer does not charge during operation, go to ″Checking operational charging.″

To check the ac adapter, do the following:

1.Unplug the ac adapter cable from the computer.

2.Measure the output voltage at the plug of the ac adapter cable. See the following figure:

3

2

1

(20V)

Pin

Voltage (V dc)

1+20

20

3Ground

Note: Output voltage of pin no.2 of the ac adapter may be different from the one you are servicing.

3.If the voltage is not correct, replace the ac adapter.

4.If the voltage is acceptable, do the following: v Replace the system board.

vIf the problem persists, go to “Product overview” on page 30.

Note: Noise from the ac adapter does not always indicate a defect.

Checking operational charging

To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

Perform operational charging. If the battery status indicator or icon does not turn on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon still does not turn on, replace the battery pack.

If the charge indicator still does not turn on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section.

Checking the battery pack

Battery charging does not start until the Power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.

To check your battery, move your cursor to the Power Meter icon in the icon tray of the Windows taskbar and wait for a moment (but do not click), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.

General descriptions

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Contents Lenovo 3000 N200 Hardware Maintenance Manual Page Lenovo 3000 N200 Hardware Maintenance Manual First Edition May Copyright Lenovo 2007. All rights reserved Contents Iv MT Before replacing parts Important service informationAbout this manual Strategy for replacing FRUsHow to use error messages Strategy for replacing a hard disk driveImportant notice for replacing a system board Using PC Entitlement Warehouse PEW Using eSupportUsing the HMM Important information about replacing RoHS compliant FRUs Safety notice Safety notices multilingual translationsDiskette compatibility matrix Diskette Compatibility Drive CapacitySafety notices Safety notices Safety notices Safety notices 10 MT Safety information General safetyElectrical safety 12 MT Safety inspection guide Grounding requirements Laser compliance statement 16 MT What to do first Read this firstRead this first Following are not covered under warrantyRelated service information Power-on password PasswordsHow to remove the hard-disk password How to remove the power-on passwordSelect Power-On Password*1 Select Master HDPScreen blank mode Power managementSleep standby mode Hibernation modeRelated service information Testing the computer Creating the PC-Doctor diagnostics disketteCheckout guide Diagnostics Interactive Tests Detecting system information with PC-Doctor Power system checkoutHardware Info UtilityChecking the ac adapter Checking the battery packChecking operational charging Pin Voltage V dcTerminal Voltage V dc Lenovo 3000 N200 Product overview Product overview Feature DescriptionStatus indicators Indicator MeaningGreen FRU tests Key combination Description Fn key combinationsNumeric error codes Symptom-to-FRU indexFail-safe timer NMI failed System board DMA test failed System board 02F6Software NMI failed System board 02F7 Error messages Make sure that every connector is No-beep symptomsConnected tightly and correctly Reseat DimmReseat the LCD connectors LCD-related symptomsSymptoms LCD assemblyUndetermined problems Intermittent problemsFRU replacement notices Screw noticesRetaining serial numbers Retaining the Uuid Restoring the serial number of the system unitReading or writing the ECA information Select 2. Read S/N data from EepromFRU replacement notices Removing and replacing a FRU Battery pack Hard disk drive Hard disk drive slot coverDimm slot cover Dimm Step Screw quantity Color Torque PCI Express Mini Card for 802.11 a/b/g wireless LANPCI Express Mini Card for 802.11 a/b/g/n wireless LAN Optical drive Heat sink assembly slot cover Heat sink assembly 54 MT 1110 CPU Middle cover and function board For access, remove this FRU Battery pack onM2 × 3 mm, pan-head, nylon-coated Black 392 Nm Kgfcm Keyboard When installing Keyboard bezel and fingerprint reader card Removing and replacing a FRU 62 MT Removing and replacing a FRU Backup battery Modem daughter card MDC Bluetooth daughter card BDC LCD unit 68 MT M2.5 × 6 mm, pan-head, nylon-coated Dark silver 392 Nm Kgfcm To remove the 5-1 Digital Media Reader board, do as follows To remove the ExpressCard slot, do as follows Step Screw cap Screw quantity Color Torque LCD front bezelInverter card LCD panel, LCD cable, and hinges Remove the hinges from the LCD panel Camera and LCD rear cover assembly For the antennas with two cables Wireless LAN antenna cablesFor the antennas with three cables Locations Front view Bottom view Rear viewInternal CRUs located behind an access panel Parts listExternal CRUs pluggable External CRUs with latchesOverall FRU CRU FRU no RoHSParts list Hlds LCD FRUs 14.1-in. Wxga TFTLCD front bezel 41R7520 CMO Chicony Language RoHSRecovery discs Windows Vista Home Premium 32 bit DVDs Recovery discsWindows Vista Home Basic 32 bit DVDs Windows Vista Business 32 bit DVDs Windows Vista Ultimate 32 bit DVDs AC adapters Corel software CDsMiscellaneous parts Common parts listTools ToolPower cords Region Volex RoHSLongwell Lenovo 3000 N200 Trademarks Trademarks Part Number
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N200 specifications

The Lenovo N200 is a versatile laptop designed to cater to the needs of both professionals and students looking for a reliable computing solution. This model stands out in the competitive laptop market thanks to its blend of performance, durability, and affordability.

One of the main features of the Lenovo N200 is its robust build quality. Using high-quality materials, this laptop can withstand the rigors of daily use, making it an excellent choice for those who travel frequently or require a device that can handle day-to-day wear and tear. The sleek design not only gives it a modern aesthetic but also enhances portability, weighing in at an acceptable range that allows users to carry it with ease.

When it comes to performance, the Lenovo N200 typically comes equipped with Intel Core processors, providing sufficient power for multitasking and demanding applications. This makes it suitable for professional tasks, including data processing, graphic design, and even light gaming. The system’s RAM capacity generally ranges from 4GB to 8GB, which allows for smooth performance when running multiple applications simultaneously.

The display of the N200 is another noteworthy feature. It usually sports a 15.6-inch HD screen, providing crisp visuals and vibrant colors for an enjoyable viewing experience, whether you are watching videos, working on projects, or browsing the web. The anti-glare technology applied to the display also helps reduce eye strain during extended use, proving beneficial for students and professionals alike.

In terms of storage, users can expect a decent HDD or SSD option that offers enough space for documents, media, and software applications. The SSD option typically ensures faster boot-up times and quicker file access, enhancing overall system responsiveness.

Connectivity is not overlooked in the Lenovo N200, which comes with various ports, including USB, HDMI, and Ethernet, enabling users to connect their devices with ease. Wireless capabilities typically include Wi-Fi and Bluetooth, facilitating seamless connectivity to the internet and other devices.

Overall, the Lenovo N200 encapsulates the essential features and technologies that users seek in a dependable laptop. With its blend of performance, build quality, and modern features, it serves as an excellent entry-level option for those looking to balance quality with budget considerations.
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