RAID and SCSI drives

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RAID and SCSI

Linux High Performance SCSI and RAID

How the Bubble/InkJet Printer Works

How a Laser Printer Works

Cleaning - The Rubber Blade removes any excess toner that drops into the debris cavity. The eraser lamp removes any excess charge off the photosensitive drum. This leaves the drum with a charge of 0 Volts.

Conditioning - The primary cornea (High Voltage Wire) adds a negative charge of around -600 volts to - 1000 volts.

Writing - The laser light hits the photosensitive drum, and dissipates the negative charge to the centre of the drum which is grounded. This leaves sections of the drum with a voltage of -100 volts.

Developing - The drum rolls through a supply of negativly charged toner particles (Particles are -200 Volts to -500 Volts).

Where the drum hasn’t been touched by the laser light, a lower negative charge is still there, so the particles are not attracted to this section of the photosensitive drum.

Transfer - A strong positive charge is applied the the paper, the particles of toner are attracted to the paper.

Fusing - The toner that is on the paper is heated and pressurixed, the toner becomes bonded to the paper.

The Toner Cartridge (or EP-Electro-Photographic) contains the photosensitive drum, Cleaning blade, and primary corona wire. The transfer corona wire is located on the printer itself.


Typical Maintenance kit includes:

Paper pickup rollers

Fuser

Transfer Roller

Advanced Startup Options (Including Safe Mode)

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How to use command prompt to save your files in Startup Repair

Select Command Prompt
Type Notepad
Click File
Click Open
Double click My Computer
Double click C: drive
Click Users folder
Click appropriate user profile folder
Save files to be backed up to external USB drive

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Corrupt Registry Repair in Windows Vista

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How to repair a corrupt registry in Windows Vista

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Installing and Using the Recovery Console in Windows XP

How to install and use the Recovery Console in Windows XP

Mouse Frozen on Lenovo Laptop

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Is your mouse frozen on the Lenovo N500 laptop?

Try clicking on the LED light at the top right hand corner of the laptop.  This should fix your problem!

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Troubleshoot and Repair Startup Issues

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You have corrupted system files and your operating system will not load, try this:

How to fix a corrupt master boot record

How to use the Bootrec.exe tool

Scan a Windows Installation Offline using SFC

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System File Checker (SFC) scans and checks all Windows Resource Protected (WRP) resources. Windows Vista added the following functionality to the SFC tool:

• Ability to scan a single file
• Ability to scan a Windows installation offline

Using System File Checker (SFC) to Fix Issues

How to Elevate to an Administrator Account

You are unable to log into your Administrator account.  Click here for tips on how to do this:

Elevate to an Administrator Account

What to do if Windows Vista not starting correctly

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The following link contains the full instructions for a Windows Vista installation, rather it be a clean install or a reinstallation.  If you are doing a reinstallation, your files are automatically saved in a windows.old folder that you can migrate to your new os after the install.  Instructions are included in the link.


Windows Vista not starting correctly

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How to use the Recovery Console in Windows XP

Recovery Console Instructions

Command Prompts for Windows

Click Here for a Listing of Command Prompts for Windows

Click here for useful Command Line Tools in Windows

Which type of memory module has 144 pins?

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A SODIMM is a 144-pin memory module designed for use in primarily laptops.  These transfer data in 64-bit chunks.  There is also a 72-pin SODIMM.  This module transfers data in 32-bit chunks.

A SIMM (Single-Inline-Memory-Module) is a 72-pin memory module designed for use in desktop computers.  These transfer data in 32-bit chunks.

A DIMM (Dual-Inline-Memory-Module) is a 168-pin memory module, also designed for use in desktop computers.  These transfer data in 64-bit chunks.

RIMM is a type of memory module that consists of Rambus Dynamic Random Access Memory chips, RDRAM chips, 184 pins. They transfer data in 16-bit chunks at a 1.6 GB bandwidth.

Computer Memory Types and Memory Technology

S-video connectors

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How many pins can there be in a S-video connector?

Answer:  Four, seven, or nine pins in an S-video connector.  S-video connectors are analog video connectors that can transfer video signals to other devices.

Video Connectors