Monthly Archives: November 2016

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The Ways to Use a Dell Laptop ePSA Error Code

Understand the ePSA codes

The ePSA codes are a set of information which guides the user about the errors within the computer system. There are several errors which can occur; moreover it is quite hard to tackle these errors. The ePSA error code is basically a number, which contains the information about the error. Different error codes have different explanation and solutions. If you are unaware of the ePSA error codes, or if you have not encountered one yet, then it is advisable to look into the Dell tech support phone number. Moreover, you can talk to the computer professionals by dialing 1 800 723 4210.

CPU’s error

The ePSA error code for this problem is 2000-0111. This is a problem which takes place in the motherboard of the computer. Moreover, it causes the processing unit to malfunction. You can gain more knowledge regarding this factor by engaging to the 24/7 customer support. The solution to this problem is briefly discussed below.

Upgrade your system’s BIOS

If upgrading does not help, then replace the motherboard or the processor.

Computer’s battery error

Here the ePSA error code is 2000-0131; this involves the dysfunction of the system’s battery. Moreover, this error may prevent the computer to start, because the battery is not in its proper function.

In order to counter this issue, first you need to shut down the computer

Make sure that the power code of the system is disconnected

Open the case of your computer and eject the battery

Place the battery again in its position. Moreover, if the error still prevails, then replace the battery and consider the technical support number.

The hard disk drive (HDD) error

The error code now, is ePSA 2000-0141, this is certainly a HDD’s error. In this case, the system might report that the hard disk drive (HDD) cannot be found or located. Even Though the hard disk drive is properly installed, it still cannot be read by the system. This error occurs, in the case where the hard drive is not installed. If you experience this issue, then consider the following resolution.

If you have a notebook computer, then simply reset the hard disk drive. In case where you have a desktop computer, plug out the data cable and the power cord of the hard drive. Plug in both of the cables, and make sure they are properly connected.

If the above mentioned solution does not works, then replace your hard disk drive.

If you still experience the issue, then don’t hesitate to call the Toll free number.

The Optical Drive Error

Another more common issue is of the optical drive, the error code for this problem is ePSA 2000-0147. In this scenario, every time you insert a disk into the optical drive, the drive fails to read the disk. Moreover, your system might inform you that there is no Blue ray or DVD drive installed. Below, is a brief instruction on how to resolve this problem?

Switch off your computer and prevent any electrical connection

Identify the faulty optical drive and disconnect the device and its connections and cables.

Now connect the cables to the optical device and restart the computer.

If the optical drive still shows an error, then call the customer support number for further assistance.

Understanding the AMI beep patterns

If the AMI beep code is one short, then it may result to a DRAM failure. A two short code, means the parity circuit has failed. Whereas the three short beeps occur, when there is a RAM failure. In addition, system timer failure is associated with four short beeps. Consider the technical support number for help.

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Here A Pros and Cons of Lithium Ion Batteries

The lithium-ion battery is very popular in a wide range of household electronics. They are common in items like MP3 players, phones, PDAs and laptops. Similar to other technologies, the lithium-ion battery has a wide range of pros and cons.

The pros:

High energy density – A major benefit is the high energy density of the lithium-ion battery. This gives the battery a high-power rating while still remaining at a relatively small size. The compact size makes it a popular choice in the mobile industry.

Low maintenance – There is no need to provide maintenance to the batteries to maintain their performance. Other types of batteries, such as the nickel-based units require a regular discharge to maintain optimal performance.

Quick charging – the lithium-ion battery is quick charging. The time-frame to fully charge is a lot less than alternatives in the market. This is a major reason why they are used in phones and tablets that are in need of the daily charging with regular use.

Light – They are relatively lightweight and small which makes them a practical choice in a wide-range of applications. In addition to small items like a phone, they are also a popular choice for electric cars and golf carts. Plus, they are commonly used in the aerospace industry.

Low self-discharge – The majority of batteries lose a certain amount of charge after disconnecting from a power source. But, the lithium-ion battery has a discharge rate that is much lower than other types of batteries. For instance, nickel-cadmium would lose its charge at a much faster rate even if the battery is left unused.

Longevity – This type of battery has great longevity and continues to give reliable performance over a very long period. Plus, they can receive a regular charge without seeing much of a difference in its capacity.

The cons:

Expensive – The process of making the lithium-ion battery is quite long and expensive. On average, this type of battery costs nearly 40 percent more to produce compared to the nickel-cadmium battery.

Transportation – It isn’t the easiest type of battery to transport and has several restrictions in place. For instance, it isn’t possible to transport the lithium-ion battery in high volume by air. However, it is still possible to fly with a few devices with the batteries in general luggage.

Circuit protection – The usable lifespan can be shortened if the battery is regularly overcharged. Also, these batteries have a built-in protection circuit to maintain the current and voltage and guarantee it is kept within safe limits.

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You Can Improving Business Challenges With an IT Support Service Provider

A business’s IT should fundamentally let it flourish and not let it down when needed most in times of disaster. Your IT infrastructure may look fundamentally correct but does it let you thrive by optimizing your business needs. As, expecting your IT to do more without proper investment will not bear any fruits and will not ever expand your portfolio too.

As an IT, should enable you to expand, manoeuvre and thrive in the market which lets you jump ahead of competitors through adaptation and meeting market disruptions.

Having an IT support team can help you to improve productivity, operations and efficiency, this can help you serve customers well and even acquire new ones. With the help of a good IT support team you can have business continuity in times of disaster and crisis situations too.

Technology should let you tap in to new revenue streams and increase sales revenue from existing ones and make you get a better market share than your competitors. It should also let you gain great insight in to your market and new prospects. Maintaining your IT properly will also let your prospects get a good experience with your business and make you target them more effectively than before and let you enjoy a greater market share than your competitors.

Customers and prospects can be segmented according to their individual needs. Hence, they can be targeted with the best value proposition if you have proper IT in place.

Technology can help streamline your business and make your employees job easier and increase efficiency. Increasing efficiency means more time and resources saved so it becomes imperative for the business to have proper IT in place and increase the profits.

Since, technology drives a business, incidents might occur and having an IT support team can help you avoid or take care of situations in a better way. And investing in a proper IT support team is crucial to any business as technology drives modern-day business and this will improve your efficiency, profits and productivity.

Having an IT support service provider in place can help improve your business considerably well. An IT support service provider can understand your business and offer solutions that will improve your efficiency, productivity and profits which will let you have an edge with your competitors as you expand and thrive in your market. So, go ahead and plan ahead for your business with the help of an IT support service provider.

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Here Digital Signatures and Certificates

When we think of VPNs, often our first thought is that of encryption of the user data. But adversaries or those intent on reading the data could However an attacker could record a conversation and then replay the replies between to participants. What we need to do is to be able to ensure the source of the data is genuine, and that is where digital signatures and certificates comes in.

To construct a Digital Signature, public key encryption systems must be in place. The construction of the Digital Signature entails applying a hash function to the message by concatenation of the message with a known secret key and then applying a mathematical function which will produce a fixed length output known as the digest. The digest is then encrypted with the public decryption key which produces a signature that can be appended to the message to verify that the message is from the genuine source.

The receiver recalculates the hash function and compared with the signature after applying the public key. If the two match, then because only the originator could have known the hash function and the private key, the message must be genuine.

Message Digest algorithms use Hash functions to map many potential inputs to each of a large number of outputs. What is normally produced is a fixed length field, typically a few hundred bits in length. A secret key is shared between sender and receiver and by concatenating this with a message for transfer, the digest is produced.

MD5 (Message Digest 5) is probably the most common hash function used, and it produces a 128 bit digest which is often appended to the header before the packet is transmitted. Any change in the message will cause the digest to change, and even the source and destination IP addresses can be used together with the message contents when creating the digest, which validates the addresses.

Another popular hashing algorithm is SHA (Secure Hash Algorithm) that produces a 160 bit digest ensuring greater security than MD5.

It doesn’t matter how long the digest is, an identical digest will always result for an identical packet. But anyone wishing to attack the system could monitor exchanges and determine which packets sent in what ever order would result in some known result. This result could therefore be reproduced by replay of the messages. This is known as a collision attack.

HMAC (Hash-based Message Authentication Code) can be used to combat collision attacks by including two calculated values know as ipid and opid, which are initially calculated using the secret key for the first packet and recalculated for subsequent packets. The values are stored after each packet and recovered for use in the calculation of the digest for the next packet. This ensures that the digest is always different even for identical packets.

A Digital Certificate is produced using some known information such as name, address, mother’s maiden name, house number, National Insurance number, or indeed anything. This information is appended to the public key and then used as part of the hash function to create the digest which is then encrypted using the private key through a secure encryption system such as RSA or AES.

A Digital Certificate can be validated by passing it through the public encryption process with the public key for the user to yield the digest. This can be compared with the calculation of the digest from the claimed identity of the user and their public key. If the two calculations yield the same result then the certificate is valid. Digital certificates are appended to messages to verify the authenticity of the source of the message.