Laptop Problems

Laptop Not Powering ON

Problem Symptom: When we press power button laptop is not powering ON and no

power indication.

Steps to be followed:

1. Reseat the battery and check

2. Check with other battery and adaptor if it available with same specification.

3. If no go remove battery from laptop and power ON the laptop in AC Mode.

4. Check whether battery charging indication glowing when we put AC Power? If

not then need to replace the mother board

5. Power ON the laptop in minimal Hardware configuration, like remove battery

HDD, ODD and check. If it works insert the above part one by one and check

6. If in minimal hardware also laptop is not powering ON then need to check the

mother board.

No Display/Dim Display

Basic Diagnostic: -

Check the Main Power Supply

Check the power cable

Check the Power Adapter

Check the Battery Power

Check the external display

Extended Diagnostic: -

Open the LCD module and check the inverter Voltages 5-12V DC Voltage at input and

80-100V A/C voltage at out put.

Check the fuse in the inverter

Check the inverter cable

Check the flex cable which is connected to LCD

Check the interface cables between LCD and MBD

Check the MBD

Resolution & Functionality Check:

Need to replace MBD if we are not getting external display also

Need to replace below spares sequencely if we are getting dim display on the screen

1) Inverter Fuse

2) Inverter

3) LCD

Need to replace below spares sequencely if not getting display on the screen but getting

external display

1) Inverter Fuse

2) Inverter

3) Flex cable

4) LCD

POST Error: Incorrect Date & Time

Problem Symptom:  When ever we are powering ON the laptop it is giving date & time

mismatch error

Steps to be followed:

1. Go into BIOS and check whether date and time given properly? If not set correct

Date & Time, save the setting and restart the laptop.

2. Again go into BIOS and check whether corrected setting saved or not? If not then

need to replace the CMOS Battery

3. After replacing CMOS Battery if still same issue, then re-flash or upgrade BIOS

version. Restart the laptop and check again.

4. Still if same problem persists then need to replace the mother board.

Keyboard/Touchpad Issue

Problem Symptom: Internal Laptop keyboard not working

Steps to be followed:

1. Remove keyboard, check for any dust on keyboard cable and mother board

connector. If it works fine well and good else need to replace the keyboard

2. Check any liquid spell on keyboard? If yes then need to replace the keyboard

3. Check with external USB keyboard. If it works fine then replace the keyboard

4. After replacing keyboard still it is not working then need to replace the mother

board.

Problem Symptom: Intermittently touchpad working with very slow

Steps to be followed:

1. Check whether touchpad driver updated properly? If not update touchpad driver

2. Remove touchpad cable and check for any dust with cable end and mother board

part? If yes clean it and Refix the same.

3. Replace touchpad with cable and check.

4. If problem not resolved after replacing touch pad with cable then need to replace

the mother board.

Audio Problem

Problem Symptom: Unable to hear audio from laptop speaker

Steps to be followed:

1. Check whether audio driver installed properly? If not install audio driver and

check.

2. Check the audio setting in control panel and confirm.

3. Connect external speaker in laptop and check whether sound is coming? If sound

is coming with external speaker then need to replace laptop internal speaker

4. If audio is not coming with external as well as internal speaker then need to check

with both Internal Speaker and Mother Board (Note: Some model will have Audio

Controller Board)

"DOS Scan"

instructions for a "DOS" Scan on Windows 2000/XP/2003

(Apologies for some pictorial & dat number differences...the principle is what matters)

1.      Go to the following site and download the latest available SuperDAT file. http://www.mcafee.com/apps/downloads...ent=enterprise

2.     Save the file to your Desktop. Close the download window when done

.

3.     Click Start, click Run, then click Browse.

4.     Navigate to your desktop and click on the downloaded SDAT file. Click Open.

5.     The full contents of the Open box should be

Code:

"C:\Documents and Settings\[Your Username]\Desktop\sdat4594.exe"

Press the RIGHT-ARROW key until you reach the end of this line. Add the following to the end of the line (be sure to include a space between the " and the /e):

Code:

 /e C:\SDAT

The full command line should be as follows:

Code:

"C:\Documents and Settings\[Your Username]\Desktop\sdat4594.exe" /e C:\SDAT

Click OK. If you get an open file security warning, please click Run.
It may appear as nothing has happened. This is normal. Wait 30 seconds and then continue.

 

6.     Restart your computer in Safe Mode with Command Prompt.
To do this, press the F8 function key during the boot process. This should be done right after the PC speaker BEEPS when first turned on and 2-4 seconds BEFORE the Windows startup logo appears.
Use the UP/DOWN ARROW KEYS to highlight Safe Mode with Command Prompt and Press ENTER to continue.

7.     When Windows finishes starting up in Safe Mode, please log in. A command prompt should appear. Type the following into the command prompt to begin the scan.

Code:

CD \
CD SDAT
scan /adl /clean /all /secure /program /streams /mime /mailbox /allole /rpterr /rptcor /report report.txt

When the scan is done, you may restart your computer normally.
A Log file showing what was found or any errors will be located at C:\SDAT\REPORT.TXT. 

How to Install Print Services for UNIX on Windows XP

How to Install Print Services for UNIX on Windows XP

This article explains how to install Print Services for

UNIX and configure a Line Printer Remote (LPR) printer.

If your network has both Windows 2000 Server print servers as well as UNIX

print servers, computers running Windows XP Professional may need to be able

to print to either environment. To accomplish this goal you need to configure

Print Services for UNIX as well as Microsoft Windows printing.

To install Print Services for UNIX

1. Click Start, and then click Control Panel.

2. In Control Panel, click Add or Remove Programs.

3. Click Add/Remove Windows Components.

4. In the Windows Components Wizard, click Other Network File and Print

Services, and then click Details, as shown in Figure 1 below.

5. Select Print Services for UNIX, and then click OK.

6. Click Next, and then click Finish.

Note:- You may be prompted for the Windows XP Professional CD to complete

the installation.

Configuring the LPR Port

The Line Printer Remote (LPR) port is best suited to servers that need to

communicate with host computers such as UNIX or VAX computers.

To configure an LPR printer

1. In Control Panel, click Printers and Other Hardware, and then click

Printers and Faxes.

2. Under Printer Tasks, click Add a printer to open the Add Printer Wizard,

and then click Next.

3. Click Local printer or stand-alone network printer, clear the automatically

detect and install my Plug and Play printer check box, and then click Next.

4. Click Create a new port, and then click LPR Port.

5. If LPR Port is not available, click Cancel to stop the wizard. To add the

LPR port, you need to install the optional networking component, Print

Services for UNIX, as explained earlier in this article.

6. Click Next, and then provide the following information:

In Name or address of server providing LPD, type the Domain Name

System (DNS) name or Internet Protocol (IP) address of the host for

the printer you are adding. The host may be the direct-connect TCP/IP

printing device or the UNIX computer to which the printing device is

connected. The DNS name can be the name specified for the host in the

Hosts file.

In Name of printer or print queue on that server, type the name of the

printer as it is identified by the host, which is either the direct-connect

printer itself or the UNIX computer.

7. Click finish button on the screen to finish installing the TCP/IP printer.

System Recovery and troubleshooting options in Windows XP

System Recovery and troubleshooting options in Windows XP

Software and hardware issues can affect the way

that your system functions. Severe problems might prevent you from

starting Windows XP Professional normally.

èSoftware problems: Installing incompatible software, incorrectly

changing system configuration settings, or installing faulty device drivers

can cause system instability or a Stop error.

èHardware problems: Hardware that is defective, malfunctioning,

incorrectly installed, or incorrectly configured can also cause instability

or a Stop error.

èOther problems: Deleted or corrupted system files caused by

problems such as user error or virus activity can cause data loss or

prevent you from starting the operating system.

Windows XP Professional provides several tools that enable you to

troubleshoot startup and stability problems, and restore system to

normal use.

Last Known Good Configuration

When the system cannot start in normal or safe mode following a

driver or application installation that causes a problem, using the Last

Known Good Configuration, you can recover by reversing the most recent

driver and registry changes made since you last started Windows XP

Professional.

Device Driver Roll Back

A Device Manager feature that allows you to replace an individual

device driver with the previously installed version if the driver was updated

after you installed Windows XP Professional. Device Driver Roll Back is

available in normal or safe mode.

System Restore

A service for x86-based computers that actively monitors your

system and records changes to the registry, to system files, and to certain

application files. System Restore allows you to undo recent registry and file

changes by using information previously saved in restore points. Use to

restore the system to a previous state. System Restore is available in

normal or safe mode.

Add or Remove Programs in Control Panel

A Control Panel feature you can use to uninstall programs. Use to

temporarily uninstall software that you suspect is causing a problem. You

can uninstall an application in normal or safe mode.

Safe Mode

If you are unable to start your system by using Last Known Good

Configuration, Windows XP Professional provides safe mode, a startup

option that disables startup programs and nonessential services to create

an environment useful for troubleshooting and diagnosing problems. In safe

mode, Windows XP Professional starts a minimal set of drivers that the

operating system needs to function. Support for devices such as audio

devices, most USB devices, and IEEE 1394 devices is disabled to reduce the

variables that you need to account for when diagnosing the cause of startup

problems, Stop messages, or system instability.

Recovery Console

A command-line environment that you can use to perform advanced

troubleshooting operations. In addition to Last Known Good Configuration

and safe mode, advanced users can use Recovery Console to attempt manual

recovery operations.

Backup

A tool for saving data, such as the system state, before you

troubleshoot problems, attempt workarounds, or apply updates. Backup

(Ntbackup.exe) enables you to restore system settings and data if you’re

troubleshooting attempts worsen the problem. Use in conjunction with a

parallel installation to restore a system that cannot start in normal or safe

modes. Backup is available in safe or normal mode.

Wireless USB Technology

Wireless USB Technology

Imagine if all the devices in a home office -- such as printer, scanner, external hard drive, and

digital camera -- could be connected to your PC without any wires. Imagine if all the

components for an entire home entertainment center could be set up and connected without a

single wire. Imagine if digital pictures could be transferred to a photo print kiosk for instant

printing without the need for a cable. These are just some of the possible scenarios for highspeed

wireless USB (WUSB) connectivity, the latest technology developed to bring even

greater convenience and mobility to devices.

Universal serial bus (USB) technology has been a popular connection type for PCs and it's

migrating into consumer electronic (CE) and mobile devices. Now this high-speed and effective

connection interface is unwiring to provide the functionality of wired USB without the burden of

cables. This next iteration of USB technology is the focus of the new Wireless USB Promoter

Group, which will define the specifications that will eventually provide standards for the

technology.

WUSB Topology

The fundamental relationship in WUSB is a hub and spoke topology, as shown in Figure . In

this topology, the host initiates all the data traffic among the devices connected to it, allotting

time slots and data bandwidth to each device connected. These relationships are referred to

as clusters. The connections are point-to-point and directed between the WUSB host and

WUSB device.

The WUSB host can logically connect to a maximum of 127 WUSB devices, considered an

informal WUSB cluster. WUSB clusters coexist within an overlapping spatial environment with

minimum interference, thus allowing a number of other WUSB clusters to be present within the

same radio cell.

Topology will support a dual role model where a device can also support limited host

capabilities. This model allows mobile devices to access services with a central host

supporting the services (i.e., printers and viewers). This model also allows a device to access

data outside an existing cluster it may currently be connected to by creating a second cluster

as a limited host.

Additionally, high spatial capacity in small areas is needed to enable multiple device access to

high bandwidth concurrently. Multiple channel activities may take place within a given area.

The topology will support multiple clusters in the same area. The number of clusters to be

supported is still being determined

Design Considerations

There are several architectural considerations in developing WUSB. In addition to providing

wireless connectivity, WUSB must be backwards compatible with wired USB and provide a

bridge to wired USB devices. Also, the host and solutions will need to enable the exchange of

data between clusters or devices not related to the same host.

Low-cost implementation of WUSB will also be important to the successful integration of the

technology. Implementation will follow the wired USB connectivity models as closely as

possible to reduce development time and to preserve the low-cost, easy-to-use model, which

has become pervasive in the PC industry.

Performance

WUSB performance at launch will provide adequate bandwidth to meet the requirements of a

typical user experience with wired connections. The 480 Mbps initial target bandwidth of

WUSB is comparable to the current wired USB 2.0 standard. With 480 Mbps being the initial

target, WUSB specifications will allow for generation steps of data throughput as the ultra

wideband radio evolves and with future process technologies, exceeding limits of 1 Gbps.

The specification is intended for WUSB to operate as a wire replacement with targeted usage

models for cluster connectivity to the host and device-to-device connectivity at less than 10

meters. The interface will support quality delivery of rich digital multimedia formats, including

audio and video, and will be capable of high rate streaming (isochronous transfers).

Summary

As the latest iteration of USB technology, wireless USB (WUSB) will offer the same

functionality as standard wired USB devices but without the cabling. As the new Wireless USB

Promoter Group prepares to develop the specifications that will help standardize the

technology, the industry is planning products that can take advantage of the convenience and

mobility that this new device interconnect will offer

Wireless USB Technology

Wireless USB Technology

Overview: Unwiring USB

Imagine if all the devices in a home office -- such as printer, scanner, external hard drive, and

digital camera -- could be connected to your PC without any wires. Imagine if all the

components for an entire home entertainment center could be set up and connected without a

single wire. Imagine if digital pictures could be transferred to a photo print kiosk for instant

printing without the need for a cable. These are just some of the possible scenarios for highspeed

wireless USB (WUSB) connectivity, the latest technology developed to bring even

greater convenience and mobility to devices.

Universal serial bus (USB) technology has been a popular connection type for PCs and it's

migrating into consumer electronic (CE) and mobile devices. Now this high-speed and effective

connection interface is unwiring to provide the functionality of wired USB without the burden of

cables. This next iteration of USB technology is the focus of the new Wireless USB Promoter

Group, which will define the specifications that will eventually provide standards for the

technology.

WUSB Topology

The fundamental relationship in WUSB is a hub and spoke topology, as shown in Figure . In

this topology, the host initiates all the data traffic among the devices connected to it, allotting

time slots and data bandwidth to each device connected. These relationships are referred to

as clusters. The connections are point-to-point and directed between the WU

The WUSB host can logically connect to a maximum of 127 WUSB devices, considered an

informal WUSB cluster. WUSB clusters coexist within an overlapping spatial environment with

minimum interference, thus allowing a number of other WUSB clusters to be present within the

same radio cell.

Topology will support a dual role model where a device can also support limited host

capabilities. This model allows mobile devices to access services with a central host

supporting the services (i.e., printers and viewers). This model also allows a device to access

data outside an existing cluster it may currently be connected to by creating a second cluster

as a limited host.

Additionally, high spatial capacity in small areas is needed to enable multiple device access to

high bandwidth concurrently. Multiple channel activities may take place within a given area.

The topology will support multiple clusters in the same area. The number of clusters to be

supported is still being determined

Design Considerations

There are several architectural considerations in developing WUSB. In addition to providing

wireless connectivity, WUSB must be backwards compatible with wired USB and provide a

bridge to wired USB devices. Also, the host and solutions will need to enable the exchange of

data between clusters or devices not related to the same host.

Low-cost implementation of WUSB will also be important to the successful integration of the

technology. Implementation will follow the wired USB connectivity models as closely as

possible to reduce development time and to preserve the low-cost, easy-to-use model, which

has become pervasive in the PC industry.

Performance

WUSB performance at launch will provide adequate bandwidth to meet the requirements of a

typical user experience with wired connections. The 480 Mbps initial target bandwidth of

WUSB is comparable to the current wired USB 2.0 standard. With 480 Mbps being the initial

target, WUSB specifications will allow for generation steps of data throughput as the ultra

wideband radio evolves and with future process technologies, exceeding limits of 1 Gbps.

The specification is intended for WUSB to operate as a wire replacement with targeted usage

models for cluster connectivity to the host and device-to-device connectivity at less than 10

meters. The interface will support quality delivery of rich digital multimedia formats, including

audio and video, and will be capable of high rate streaming (isochronous transfers).

Summary

As the latest iteration of USB technology, wireless USB (WUSB) will offer the same

functionality as standard wired USB devices but without the cabling. As the new Wireless USB

Promoter Group prepares to develop the specifications that will help standardize the

technology, the industry is planning products that can take advantage of the convenience and

mobility that this new device interconnect will offer.