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Laptop PCs: Choosing, Using, Upgrading, Fixing Problems and Repairing Laptop/Notebook Computers - Page 4Last updated on 25 May 2008
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UK - Crucial Memory Advisor - UK
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| USA - Crucial Memory Advisor - USA
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For example, if your computer has an Asus motherboard, open the menu, scroll down to ASUS, and click GO. If, say, you have a Dell computer, scroll down to DELL, and do likewise. You will be taken to the relevant information on Crucial's website.
If you don't know the make and model of the motherboard installed in your computer, here is a good free utility - Belarc Advisor - that creates an analysis of the hardware and software on a personal computer. Look under FREE DOWNLOAD - http://www.belarc.com/. Another utility that also provides detailed information on the memory itself is CPU-Z.
Beware of phoney laptop hotspots
For those of you who don't know, a hotspot is a place that allows a user equipped with a laptop computer that is itself equipped with a wireless network adapter to log on to the Internet, either as a free or as a paid-for service.
It can be difficult to determine if you have logged on to to genuine hotspot or not. All a con artist has to do is give the wireless connection installed on a laptop a plausible name or SSID (Service Set Identifier), and set it to be connected to on an Ad Hoc basis that connects computers equipped with wireless adapters directly to each other instead of via a wireless access point (a wireless switch). Then, when someone comes along to the bar or pub, etc., who is under the impression that it offers a hotspot to its customers, that person's wireless-equipped laptop will identify all of the open networks in the area. If the person decides to network with the con artist's computer instead of make use of the genuine hotspot, he or she won't be connected to the web. If the genuine hotspot requires users to enter a credit-card number before it allows them to use it, the con artist can create a phoney web page that allows those details to be stolen. If the unsuspecting person is able to make use of websites, such as the sites of banks, etc., they have been cached on the con artist's laptop computer. Any logon or account details that the person enters will also be made known to the thief.
Anyone who makes use of a hotspot is best advised to make use of them to access public websites only, but if you have to access a private account of any kind, you should make sure that the site address starts with https:// instead of just the http:// and that the secure yellow padlock icon appears on the bottom bar of the browser that means that the connection to the site is securely encrypted. You should also make sure that your wireless network settings are set so that you have to connect manually instead of automatically to wireless networks or hotspots.
To disable the ability of Windows XP to connect automatically to any available network or hotspot, double-click the wireless network's icon in the System Tray (Notification Area) in the bottom left corner of the screen. In the window that presents itself, click Change the order of preferred networks, and then click the Advanced button that appears under the Wireless Networks tab. Enable the Access point only option and disable the the Automatically connect option, and click on Close.
How to protect yourself at wireless hot spots -
"They can be an invitation to disaster, says Preston Gralla, who offers a surefire plan to avoid security breaches." -
http://www.computerworld.com/action/...=9007142&intsrc=news_rfavs
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Click here! to go directly to information on this site on wireless networks, and visit the Networking Problems pages on this site to find out which problems have been covered.
Travelling (US: traveling) with laptops and security measures
Unfortunately, because the housing of laptop/notebook computers and other electronic devices, such as PDAs and GPS devices, can be used to contain high-explosive bombs, they come under special scrutiny when their owners are passing through the security screening at ports and airports. Being expensive, such devices are the favourite targets of thieves. Fortunately, there is plenty of free information on the web that can help ease your way through security screening and help you thwart thieves.
It is safe to put a laptop PC through the hand baggage x-ray scanner, but you shouldn't put it through the higher powered checked baggage scanner. You should make sure that the battery has enough charge to power up, because the security officials can ask you to turn the computer on to make sure that it is working and hasn't been emptied and filled with explosive.
The following article provides travelling tips and advice on how to thwart thieves.
August 15 - 2006. - How To Prep Laptops For Airport Security -
"Some companies are beginning to rethink laptop security policies in light of the United Kingdom's ban on electronic devices in airplane cabins. Security providers are offering a few tips for travelers flying in and out of the United Kingdom." -
http://www.techweb.com/...RSSfeed_TechWeb
Traveling With Laptops In The Post-9/11 World -
http://www.informationweek.com/showArticle.jhtml?articleID=6503586
How Not to Pack a Laptop - http://tech.yahoo.com/gd/how-not-to-pack-a-laptop/...
10 Tips To Secure Your Laptop -
"Whether you're home or on the road, these security steps will help protect you and your computer from wireless scoundrels." -
http://www.informationweek.com/news/showArticle.jhtml...
What do I have to know in order to use my notebook computer in the US and Europe?
Question
I will have to use my laptop computer when I travel to the US and Europe from the UK. Are there any important considerations that I should know about in order to be able to do that?
Answer
You shouldn't have a problem charging the laptop in the US or Europe, because the power supplies on most laptops can accept 100-240V at 50Hz or 60Hz. However, make sure by checking the label. However, you will need an adapter in order to be able to plug it into the mains. Someone using an American laptop in the UK would have to use an adapter that allows it to be connected to the UK mains system. You can also buy surge protectors for additional safety. Read the information on these two pages:
LAPTOP USE ABROAD - http://www.travelproducts.com/store/laptops.htm
ELECTRICAL MATTERS - http://www.travelproducts.com/store/electric.htm
It has become more difficult to take a laptop through airport security. You will probably have to switch it on to prove that it is a working computer, not a disguised bomb.
You can use a laptop on a plane, but you should deactivate the wireless network adapter, because you don't want to log on to other laptops wirelessly and you don't want other laptops logging on to yours. You can do that via Network Connections in Windows XP by right-clicking on the adapter.
Note that the computer's warranty might not allow it to be serviced outside the UK, so check with its manufacturer before you go abroad. You should also have sufficient travel insurance to cover the value of the computer in case it is stolen, lost, or damaged.
For more information on laptop security, of which there is plenty on the web, you can make use of the Google search box at the top of this page. Entering a search term such as laptop + security brings up many useful links.
Overheating: Laptops are prone to overheat
Because laptop notebook computers have powerful, miniaturised components that, at their best, can offer almost the same performance as desktop processors, the best methods of keeping them cool also have to be miniaturised and therefore aren't as effective as the best full-scale methods employed in desktop computers.
The components used in laptop computers aren't as highly standardised as they are in desktop computers, for which there is a high degree of technological uniformity. Different laptops/notebooks can employ different technologies, such as different internal architectures and different power and cooling systems.
When a laptop/notebook gets too hot, the causes are almost always one or more of the following: environmental factors, an accumulation of dust and dirt blocking the airflow inside the case, and a dead or dying fan.
Most laptops have heat-sensing circuits that can shut the computer down when the internal temperature reaches a dangerously high level. Data might be lost in the process, but the hardware will probably survive. If the overheating laptop doesn't shut down automatically, data errors or lockups will probably start occurring. Again, data will probably be lost. The computer itself might be saved from component failure by quickly executing a manual shutdown. In a worst-case scenario, or after repeated overheating episodes of a lesser degree, an overheating laptop can be rendered useless and irrecoverable.
Every time a laptop computer suffers from overheating, the components will be weakened, and an accumulation of overheating events can eventually result in complete failure. Therefore, it's wise to make sure that overheating never takes place.
To avoid overheating, don't leave or use a laptop in strong sunlight for long periods, don't leave it in a closed car on a hot day, and don't place it on or use it near heat sources such as radiators, hot-air vents, etc.
Read the laptop computer's user manual, which should provide tips on how to keep it clean and troubleshoot problems, and visit the manufacturer's website for technical information, software utilities, and updates.
If a laptop computer is under warranty, opening its case usually renders the warranty void, so whatever you do has to be done without opening the case. Anyhow, it's not a good idea to open the case because the highly integrated nature of the components makes them inaccessible, and many of the components, such as the RAM modules, can be killed by static electricity discharges that are transferred to them from the user's body. However, it's always a good idea to open the battery compartment and remove the battery before cleaning a laptop computer.
You can test if a cooling fan is dead or dying by placing your hand over the fan's outlet at the back or the bottom of the case. If there is little or no air being expelled, you have to install a new fan yourself, or have a professional technician install it.
With some laptops it's possible to clean or replace the processor's fan by unscrewing a cover on the computer's underside that is over the fan's inlet. Unfortunately, other laptops require a complete disassembly in order to get at the fan. If that is the case you should at least be able to clean the fan by making use of a can of compressed air.
It's amazing how quickly dust can build up in desktop and laptop/notebook computers. With desktop computers, dust can accumulate in the processor's fan unit and within the case, including over the motherboard. Spiders can spin webs inside desktop computers that can cause electrical short-circuiting. With laptops, the dust builds up in the fan unit and on the keyboard, but there isn't enough free space in a laptop for spiders to spin their webs. Dirt can accumulated around any of the inlets.
Most laptops/notebooks that use one or more fans to draw air through the case for cooling usually have one or more air intakes through which cool air enters the system and is then expelled through one or more outlets.
A heat exchanger (heatsink) radiates excess thermal energy from the processor or the system as a whole into the incoming cool air. The kind of fans used are miniaturised versions of the same type of fan units used with a heatsink in most desktop computers. However, some laptop/notebook systems are cooled by natural convection. They have case openings and an internal heat exchanger, but don't make use of a fan. Other units, such as handheld computers and some smaller laptop computers don't even have case openings for airflow. The case itself is used as a heat exchanger. Such computers tend to be low-power units and don't generate much heat, so overheating isn't usually a problem with them. Turning such a unit off for a while, or moving it to a cooler spot is usually all that's necessary to remedy any overheating.
How to remove accumulated dust and clean a laptop/notebook computer
To remove accumulated dust in an air-cooled laptop computer, all you have to do is use cotton buds to loosen the dust and a can of compressed air (available from most computer shops) to send blasts of it into the the air intake(s) and outlet(s). You can also use the compressed air on the keyboard to blow out accumulated dirt. I use cotton buds to remove any grime or dirt from around the outlets and drive bays. With some laptops, the keys can be removed so that you can clean underneath them. Just make sure that you put a particular key back where it came from or you'll get the wrong character coming up on the screen when you press the key.
A relatively cheap can of compressed air costing a few pounds or dollars can last for several cleanings. It produces directionally controllable, intense bursts of dry, clean air, and usually comes with a long plastic nozzle that's used for cleaning dust out of crevices and other areas that are difficult to reach. There should be instructions on how to use it in the packaging, or on the can itself.
Take care when aiming compressed air at the laptop's fan(s). A strong blast can over-rev a fan sufficiently to cause damage to its motor or bearings. To prevent such damage, keep the fan from spinning as you clean it by, for example, inserting a clean cotton bud between the fan's blades to secure it.
Quite a bit of dust can be expelled with the first few blasts of air. Note that with some makes of can it's possible for a super-cooled liquid to be expelled if you invert the can, which won't do either the laptop or anything else the liquid may come into contact with any good, so make sure that you follow all the instructions that come with the particular product you use.
The TFT LCD screens of laptops are far less robust than the glass-covered screens of standard CRT monitors, so care should be taken when cleaning them. The laptop's user manual should provide tips on how best to keep the screen clean.
A laptop/notebook computer should never be used if one or more of its fans are dead, because permanent damage may be the result. Replacement fans can be purchased from some suppliers. If a laptop is out of warranty, you can open the case, remove the dead fan, and install the replacement yourself. But if the laptop is still under warranty, or if you're not confident of your abilities, it's best to get a qualified technician to do the job.
A free temperature, fan-speed, and voltage-monitoring utility
SpeedFan from http://www.almico.com/speedfan.php is a free thermal monitoring utility that can monitor the temperatures, fan speeds, and voltages of many computer systems. Not all of SpeedFan's features work on all systems, but temperature monitoring, which is its most-important function, works on most systems that are equipped with the kind of thermal sensors that most laptops have.
Note that Dell notebooks are non-standard, with some proprietary hardware. Standard tempetature tools may not work on a Dell notebook. Speedfan is supposed to be able to deal with Dell notebooks, but it may not work. I tried it on a new Dell notebook and it could sense the temperatures fairly well, but it couldn't control the fans reliably. So I tried using the free i8kfan from http://www.diefer.de/i8kfan/. The tool's name was derived from the fact that it was designed for Dell's Inspiron 8000 notebooks, hence the i8k. But it also works on other Dell notebooks, including these: Inspiron 9100, Inspiron 9200, Inspiron XPS, Inspiron 6000, Latitude D610, Latitude D810, and Precision M70.
Processor frequency control for notebooks running Windows XP
Another related freeware tool is provided from the same site as i8kfan.
SpeedswitchXP - http://www.diefer.de/speedswitchxp/index.html
It is a "CPU frequency control for notebooks running Windows XP." It has a number of dynamic and set processor speed modes that allow the processor to increase or decrease its speed (frequency) as the situation demands, or remain at a set speed. By reducing power consumption it reduces the radiation of heat and extends battery life when the notebook is running on battery power.
The combination of the control of the fans by Speedfan and control of the processor by SpeedswitchXP has made the Dell notebook run as much as 10 to 15 degrees C cooler than it was before using those tools. That is an impressive reduction in temperature that should help extend the life of the machine.
Using a LapDesk
Using a LapDesk ensures a good flow of air all around the machine.
Targus Notebook Portable LapDesk™ -
http://www.targus.com/us/product_details.asp?sku=PA243U
Gaming laptops/notebooks
To play the latest games with performance coming close to the performance that high-end desktop computers (that are designed for gaming) can deliver requires a laptop computer running a desktop processor and powerful video chip (graphics processor), because raw processing power is required.
The most powerful power-saving mobile processors that Intel and AMD have created for laptops can be used, but they can't perform as well as the most powerful desktop processors, because they're designed to keep cool and to save battery power.
Therefore, a laptop designed for playing the latest games, such as Doom 3, gives off plenty of heat. Consequently, large heatsinks have to be used, and that results in a bulky case.
Battery power won't last very long if a non-power-saving desktop processor is installed in a laptop. Consequently, the user will probably want to carry the mains power adapter around with the laptop. But doing that isn't going to be very comfortable with the bulkiest gaming laptops, because they usually have matching bulky brick-sized mains adapters.
Another vital specification of a gaming laptop is a TFT monitor with the fastest available pixel response time, which is now down to as low as 8ms ( 8 milliseconds). A monitor with a pixel response time of 25ms or even 16ms is too slow to display high-frame-rate, rapid-motion video undistorted or without ghosting.
Below are gaming laptops reviewed by Computer Shopper in its June 2005 issue [made available from around April 20]. You'll note that the machines made by local UK manufacturers receive better reviews than the machines of the large brand-name manufacturers such as HP, Sony, and Asus.
Click on the make and model to visit the manufacturer's website. For reviews, visit http://www.pcpro.co.uk/shopper. You can make use of the Google search box provided at the top of this page to find other reviews and suppliers.
GAMING NOTEBOOKS / LAPTOPS | |
| Sony Vaio VGN-FS195XP | Two stars - priced at £1,344 |
| Asus V6000V | Three stars - priced at £1,599 |
| Acer TravelMate 8104WLMi | Four stars - priced at £1,472 - given a Technical Merit award |
| AJP D900T | Five stars - priced at £1,600 - given a Best Buy award |
| HP Pavilion ZD8053EA | Three stars - priced at £1,299 |
| Mesh Ultima PCI-E CSX | Four stars - priced at £1,599 |
| Evesham Voyager C510 | Three stars - priced at £1,299 |
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The Gaming section of this site provides useful information on gaming and games using the PC and console gaming platforms.
Installing Ubantu Linux on a laptop/notebook computer
I have a laptop PC that was running Windows Me that I was going to bin, but I decided to experiment by installing Ubantu 6.06 Linux on it. The computer was running very slowly, its Ethernet network card was no longer working, and there was not much space left on its small 10GB hard disk drive.
Ubantu recognised all of the computer's hardware, including the Ethernet network card. I added a wireless network card. When Ubantu was installed with all the free Linux software I needed, there was plenty of disk space left, and the computer worked at a respectable speed. Ubantu has a very good-looking desktop interface. The computer is now part of my home network.
Since then, my positive experience of Linux inspired me to install a more advanced Linux distribution on a new laptop. The free open-source Beryl/Compiz Fusion desktop that I use on my new laptop is very attractive, and the amount of quality free open-source software matches any software for Windows.
Convert vinyl records to a CD/DVD format
Many people would like to convert their vinyl records to a recordable CD/DVD format such as MP3. If you want to use a laptop computer to do that, if it doesn't have a line-in port, you have to equip it with an external USB adapter or use an external USB sound card that is the equivalent of a standard PCI sound card.
How To Record Vinyl Records (singles and LPs) to MP3 files and Audio CDs - http://www.br0wn.co.uk/vinyltocd.htm and Converting vinyl on a laptop. Another page on the subject is: Convert your LPs into CDs.
Reviews: laptop/notebook computers
What Laptop and Handheld PC: http://www.whatlaptop.co.uk/
Computer Shopper:
http://www.pcpro.co.uk/shopper/archiveproductsearch/9/Laptops
LAPTOP/NOTEBOOK PROBLEMS AND SOLUTIONSClick here! to go to the laptop/notebook problems dealt with on this site. |
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PC Buyer Beware! Copyright © Eric Legge 2004-2008. All rights reserved.
