Lenovo E50, E40 manual Intermittent problems, Undetermined problems

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Intermittent problems

Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a problem recurs.

When analyzing an intermittent problem, do the following:

1.Run the diagnostic test for the system board in loop mode at least 10 times.

2.If no error is detected, do not replace any FRUs.

3.If any error is detected, replace the FRU shown by the FRU code. Rerun the test to verify that no more errors exist.

Undetermined problems

If the diagnostic tests did not identify the adapter or device that has failed, if wrong devices are installed, or if the system simply is not operating, follow these procedures to isolate the failing FRU (do not isolate FRUs that have no defects).

Verify that all attached devices are supported by the computer.

Verify that the power supply being used at the time of the failure is operating correctly. (See “Power system checkout” on page 53.)

1.Turn off the computer.

2.Visually check each FRU for damage. Replace any damaged FRU.

3.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.DIMM

g.Optical disk or diskette in the internal drive

h.PC Cards

4.Turn on the computer.

5.Determine whether the problem has been solved.

6.If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.

7.If the problem remains, replace the following FRUs one at a time (do not replace a nondefective FRU):

a.System board

b.LCD assembly

68ThinkPad Edge 14″, Edge 15″, E40, and E50 Hardware Maintenance Manual

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Contents Page Page Page First Edition March Copyright Lenovo Contents 185 ThinkPad Edge 14″ and E40 ThinkPad Edge 15″ and E50Page Safety information General safety Electrical safety Page Safety inspection guide Grounding requirements Safety notices multilingual translations Page Safety information Page Safety information Perigo Perigo Page Safety information Vorsicht Vorsicht Page Safety information Page Safety information Page Safety information Peligro Peligro Page Safety information Laser compliance statement multilingual translations Safety information Cuidado Não abraSafety information Öffnen GefahrSafety information Page Safety information Precaución Safety information Page Important service information Before replacing parts Strategy for replacing FRUsStrategy for replacing a hard disk drive Select Downloads and driversHow to use error message Important notice for replacing a system boardDynamic Configure To Order CTO FRU identification for CTO, CMV, and GAV productsUsing eSupport Page General checkout Following are not covered under warranty What to do firstDiagnostics using PC-Doctor for DOS Checkout guideTesting the computer Hardware Info Diagnostics Interactive TestsUtility PC-Doctor for Rescue and Recovery Lenovo ThinkVantage Toolbox Lenovo System ToolboxFRU tests Following table shows the test for each FRUInteractive Tests --Mouse Checking the ac adapter Power system checkoutChecking operational charging Checking the battery pack Checking the backup batteryWire Voltage V dc Page Related service information Restoring the factory contents by using Recovery Disc SetPasswords Power-on password Hard-disk passwordSupervisor password How to remove the power-on passwordSelect Power-On Password How to remove the hard-disk passwordSelect Master HDP Related service information Power management Screen blank modeSleep mode Hibernation modeSymptom-to-FRU index Numeric error codesDimm 02F5 Error messages No-beep symptomsLCD-related symptoms Reseat the LCD connectorsIntermittent problems Undetermined problemsStatus indicators Indicator Meaning On-screen indicators Caps lock Special keys and Fn key combination Special key or Fn Description key combination Screw notices Plastic to plasticLogic card to plastic Torque driverRestoring the serial number of the system unit Retaining serial numbersRetaining the Uuid Reading or writing the ECA information Page Removing and replacing a FRU Battery pack Important notice for replacing a battery packExpressCard blank bezel Optical drive or travel cover Step Screw quantity Color TorqueThermal cover Hard disk drive HDD assembly Removal steps of HDD assembly Dimm Fan assembly For ThinkPad Edge 15″ and E50 For ThinkPad Edge 14″ and E40 M2 ⋅ 4 mm, wafer-head, nylon-coated Silver 181 Nm KgfcmRemoval steps of fan assembly For discrete fan assembly For integrated fan assembly 1080 CPU WAN M2 ⋅ 3 mm, wafer-head, nylon-coated Black 181 Nm Kgfcm Removal steps of SIM card Palm rest assembly with cables Removal steps of palm rest assembly with cables When installing PCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless LAN Backup battery Bluetooth daughter card BDC-2 Keyboard M2 ⋅ 5 mm, wafer-head, nylon-coated Black 181 Nm KgfcmStep Screw quantity Color Torque When installing the keyboard, do as follows Keyboard bezel Step Screw quantity Color Torque Removal steps of keyboard bezel LCD unit M2.5 ⋅ 6.5 mm, wafter-head, nylon-coated Black 392 Nm KgfcmStep Release wireless antenna cables from the cable guides Step Screw quantity Color Torque Removal steps of LCD unit Top shielding assembly Removal steps of top shielding assembly System board assembly Important notices for handling the system boardCPU Location of major sensitive components on the system board Removal steps of system board assembly Removal steps of system board assembly USB connector board and USB cable assembly For ThinkPad Edge 14″ and E40 DC-in cable and base cover M2 ⋅ 5 mm, wafer-head, nylon-coated Black 181 Nm Kgfcm For ThinkPad Edge 14″ and E40 For ThinkPad Edge 15″ and E50 For ThinkPad Edge 14″ and E40 LCD front bezel Step Screw cap Screw quantity Color TorqueSpeaker assembly Integrated camera Hinges, LCD panel, LCD cable, and LCD rear cover assembly M2 ⋅ 5 mm, wafer-head, nylon-coated Black 181 Nm Kgfcm Step Screw quantity Color Torque Antenna assembly Locations Front viewPage Rear view Bottom viewPage Self-service CRUs Optional-service CRUsOverall CRU CRU CRU CRU CRU CRU CRU CRU DVD-RAM/RW drive 63Y0903 DVD-RAM/RW drive 63Y0905 CRU CRU CRU CRU CRU CRU CRU CRU CRU CRU No. FRU Overall FRU no CRU CRU LCD FRUs FRU 14.0-inch HD LCD FRU no CRU CRU CRU FRU 15.6-inch HD LCD FRU no CRU CRU CRU CRU CRU Language FRU no Parts list-Illuminated keyboard Miscellaneous parts AC adapters Power cords Recovery discs Windows 7 Home Basic 32 bit DVDs Windows 7 Home Premium 32 bit DVDs Windows 7 Home Premium 64 bit DVDs Windows 7 Professional 32 bit DVDs Parts list-Windows 7 Professional 32 bit recovery DVDs Windows 7 Professional 64 bit DVDs Parts list-Windows 7 Professional 64 bit recovery DVDs Common service tools ToolPage 185 Trademarks Page Part Number 75Y4302
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E40, E50 specifications

Lenovo has long been recognized for producing reliable and innovative laptops, and the E50 and E40 series showcase this commitment to quality and performance. Targeted primarily at small businesses, these models are built for efficiency, durability, and usability, making them a popular choice among professionals on the go.

The Lenovo E50 comes equipped with the latest Intel processors, ensuring fast and efficient multitasking capabilities. With options for Intel's Core i5 or i7 processors, users can enjoy seamless performance for everyday tasks alongside more demanding applications. Additionally, the laptop supports DDR3L RAM, which can be configured up to 16GB, providing substantial memory for applications and enhancing the overall user experience.

On the other hand, the E40 series features a slightly more compact design while still offering robust power. This laptop variant is also equipped with Intel processors, providing a solid foundation for various computing needs. With a focus on portability, the E40 is an ideal solution for professionals who require a lightweight device without sacrificing performance.

Both models come with Lenovo's signature AccuType keyboard, which features a user-friendly design for comfortable typing, reducing user fatigue during prolonged use. This keyboard design is particularly beneficial for business users who may spend hours drafting reports, answering emails, or engaging in video conferences.

In terms of display, the E50 and E40 laptops boast vibrant HD screens that deliver sharp visuals and broad viewing angles. The anti-glare technology further enhances usability, allowing users to work effectively in various lighting conditions.

Connectivity is another strong point for both laptops. Equipped with multiple USB ports, HDMI output, and an Ethernet port, these devices offer versatility for connecting a variety of peripherals, external displays, and networks. Additionally, built-in Wi-Fi and Bluetooth ensure that users remain connected, facilitating collaboration and communication.

Security features are also paramount. Both the E50 and E40 offer options for fingerprint readers and TPM 2.0, ensuring that sensitive data remains protected against unauthorized access.

In conclusion, the Lenovo E50 and E40 series represent robust solutions for small businesses and professionals seeking reliable performance, portability, and comprehensive features. With their powerful processors, quality displays, ergonomic keyboards, and strong security measures, these laptops provide a balanced mix of productivity and convenience, making them valuable tools in today’s fast-paced work environment.
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