Diagnosing And Troubleshooting Computer Hardware

What is Hardware?

Are these terms familiar to you? Monitor, RAM, CD drive, CPU, graphic cards are all hardware, or more accurately, computer hardware. These components make up a computer, working together with computer software to make a computer work.

Simply put, hardware is the tangible parts of your computer, parts you can touch, feel and so on.

Hardware Failures

As mentioned before, hardware and software work together to form a fully functional system, theoretically. However, rarely do you get a fully functional system all the time. There will almost certainly be malfunction of hardware, be it within the electronic circuits or even the whole component itself. Sometimes, the originating factor of the hardware failure is not the components of the system itself, but due to outside factors such as environmental disasters like fire, earthquakes and lightning storm.

Recovery of failed hardware components is not a big problem by itself. It is basically identifying and replacing the problematic component. However, hardware failures are most deadly, when it affects daily routine and affecting critical personal or business data. This is especially true of the most important component of a computer system when it comes to storage of data, the hard disk.

The following is a list of common hardware failures:

RAM Failures
Power Connector
Hard Disk
LCD Failures
RAM Failures
Bad RAM is somehow harder to diagnose as similar symptoms may be caused by software problems, other hardware problems or even motherboard failure. However if you experience any of these symptoms, users should check for bad RAM before attempting any other troubleshooting.


Windows doesn’t start showing different error messages each time.
Windows crashes (blue screen) or freezes frequently.
Windows crashes as soon as you try to start a program.
Unexplained random crashes and freezes without error messages.
Power Adaptor
The common weak spot on any laptop is the DC power jack. If someone trips over the power adapter cable while it is still connected to the laptop, there is a high possibility that the power jack will get severely damaged.

On most laptops, the DC power jack is soldered directly to the motherboard and there are only three or four small pins holding it in place, which makes the power jack rather weak. Any sideways pulling of the DC power cord while attached to the laptop will usually dislodge at least one of these pins, breaking the solder around it. Modern laptops use quite a lot of power, from about 70W to 120W or even more. The bad electrical connection from the dislodged pin will cause sparks and heating that will eventually burn a hole through the motherboard and can even be a fire hazard.

Symptoms which indicates poor contact between the DC power jack and the motherboard:

The battery is not charging properly or stays at half charge despite having to use the power adaptor.
The screen flickers (the brightness is changing) while the power cord is plugged in. This is caused by the laptop switching between DC power (screen is brighter) and battery power (screen is dimmer).
The DC plug gets hot after a few minutes of use and may even smell of burning.
There are “scratching” sounds coming from the DC jack.
How to test for broken power jack:

1. Remove the battery 2. Plug in the power cord 3. Start the laptop 4. Gently wiggle the DC power plug on the back of the laptop
If the laptop shuts down abruptly (looses power), find the dealer to re-solder or change the DC power jack as soon as possible as the motherboard has already started to burn around the dislodged pins. The manufacturer might offer to replace the whole motherboard; however the price of a new motherboard together with the labor charge for installing it will usually cost more than the current value of that laptop and sometimes can the pricing can cost over a thousand dollars.

Replacing or re-soldering the DC power jack is not an easy job. It usually takes a few hours depending on the damage and the model of the laptop. To reach the power jack, the laptop has to be completely disassembled and have the motherboard taken out. Then if the board around the dislodged pin is badly burned, the power jack has to be un-soldered and the board has to be patched.

After that a different power jack has to be installed, attached to the case of the laptop and connected with wires to the motherboard, as the patched board wouldn’t be strong enough to support the original type of power jack that was soldered directly to the board.

Hard Disk

Hard disk failures are the most common computer hardware problems. And laptop hard disks fail more often than desktop hard disks due to the portability of a laptop as compared to the rather stagnant laptop. If user knock hard or drop the laptop even a few inches while the hard disk is being accessed or powered up, damage can be done to the hard disk.


The laptop starts as usual but when Windows starts to load it goes to blue screen with either “UNMOUNTABLE_BOOT_VOLUME”, “hal.dll is missing or corrupt” or “WINDOWSSYSTEM32CONFIGSYSTEM” (or similar) is missing or corrupt. All these error messages indicate a file system problem. Sometimes it can be fixed by just scanning the hard disk for errors. However more than half of these cases indicate that the hard disk is starting to go bad and is probably developing bad sectors.
The laptop starts as usual but Windows freezes on the initial “Windows XP” screen, although the blue bar continues to move, and users are able to hear feint but continuous clicking. Hard disks have to be replaced.
As soon as the laptop is started there are loud clicks or grinding sounds and Windows doesn’t load. Hard disks have to be replaced as well.
Shortly after starting the laptop a message appears (usually on a black screen) “SMART test failed. Backup your data immediately and replace the hard disk” or similar. Well, that says it all. S.M.A.R.T. is a self-test that is build into the hard disk.
In almost all cases the laptop can be started from a “live” bootable CD and everything works normal. In rare cases the hard disk PCB (printed circuit board) may get short circuited and even burn. In this scenario, the laptop won’t start unless the hard disk is removed.

A good tool to use to check for hard disk lifespan is ADRC’s hard disk checker. It will scan the hard disk for bad sectors and inform you if the drive is still of good usability.


Overheating happens when inadequate airflow from outside the computer’s case across the CPU and motherboard and back out of the case usually via the power supply fan and other case fans.

Once the airflow is disrupted, heat builds up rapidly within the case. This causes components to either shutdown, if such protection is built in or performs erratically. Over the long term, overheating can irreversible damage components.

It is also advisable to keep the computer in a dry and shaded room, which is clean and little dust.

LCD Failures

The most common LCD or “Liquid Crystal Display” screen failure is the inverter, cable and backlight.


The laptop appears to start as usual but the screen is black, if users move it, it turns on and works properly. Failed cable.
The laptop appears to start as usual but the screen is very dark, although it changes colour a little and users can see a very feint image. Failed inverter or cable 90%/10%.
Immediately after starting the screen has dark pink/red tint and turns dark after a few seconds. Failed backlight.
The screen flickers a few times but then turns dark, if users move it or tap it lightly on the sides, it flickers again. Failed cable or LCD 50%/50%.
Screen is either black or white (no picture) and external monitor works. Failed cable or LCD 30%/70%.
There are stripes on the screen (either vertical or horizontal) that change when users move the screen or tap it lightly on the sides. Failed cable or LCD 10%/90%.
Most motherboard related failures are due to the “On-board” regulated supplies and component failure within those circuits. The on-board power supply circuit had partially failed and was overloading subsequent components else the problem would be with the capacitors which are defective in the first place.

A motherboard failure on a laptop that is out of warranty would usually mean that it’s time for a new laptop. The price of a new motherboard is usually higher than the current value of the laptop.


Plug in the power adaptor and try to start the laptop.

Nothing happens.
The “ON” light comes on, the fan spins, but nothing on the screen (black) and you can’t hear the HD working after 10-15 sec.
The “ON” light comes on, the fan spins, but after a few seconds the light goes off.
After pressing the “ON” button the screen stays black and you can hear a quiet high-pitched sound coming from the laptop.
Corrupted or improper device drivers and operating system
Invalid or corrupt device drivers can wreck havoc on a server, rendering the system unbootable in some cases. Device drivers may also conflict with certain application programs and cause problems with the computer system.

As Windows Vista has just made its launch, chances are some hardware is not supported or not supported fully by the new operating system.

Also, system updates, driver updates can also fix your “hardware” problems.

Controller Failure:

A controller failure can act much like a drive failure. However, when a drive fails, users cannot access that particular drive; when a controller fails, users cannot get access to all the drives, devices and any other components that is attached to that particular controller.

A controller fails because a component or components on the on the controller board fails. When users trying to boot the system, they cannot switch on, view, access, or even get hardware conflict messages.

Controller failure occurs due to one of the following reasons:

Devices/components not connected properly
Verify that the cables are properly connecting the device /component to the controller
If the component fits into a slot, see that the it is flushed in and not loosely connected.

Devices/components not setup properly
Verify that the devices/components is being properly detected and setup in the respective controller setup screen

Bad connectors
Replace the bad connectors with new working ones

Bad components
Replace the component

Bad interface board or motherboard
It is recommended that these components be replaced or that the computer be sent in for servicing

Hardware Failure: The big issue
The big problem, as mentioned earlier, is not replacing or repairing the non-functional hardware, but the time lost, interruptions to daily routine (especially for businesses), and the loss of critical data. If you need a running system at all times, have a backup system as a fail safe, or even two. If users want to ensure that none of their critical data is lost in the event of a hardware problem with their computer, there is only one way to do it — Back up the data as often as possible.

There are many different ways to ensure that the data is backed up, and as technology becomes advances, back up methods become much simpler.

Let’s look for a moment at what a back up is. Backing up of computer files means that users are making a copy of the data that will be stored somewhere other than on the computer. Everyone should always have a back up of at least the most important files, because should anyone experience a hardware problem, they could still be able to access the files.

Many people don’t back up their files, because they don’t know what they need to back up. Start with those files that cannot easily be recreated. Then, move on to files to which you make frequent changes just in case you accidentally change something that you shouldn’t have. Back up your music collection – because this can be quite expensive to replace in the event of data loss.

Types Of Computer Repair Services

The modern world of today finds computer technology indispensable in the daily lives. Initially they were just hi-fi hardware gadgetry combined with software techniques which elicited awe from its users. Nowadays, it’s difficult to manage practical, social, and financial life without the inclusion of computers one way or the other.

The people of Scottsdale AZ and the suburbs within like Paradise Valley, Gilbert AZ, and Higley AZ etc, are also keen on using computers for their daily works requirement. Whether you do an online marketing job, are a student completing university-level thesis, a mother writing a cooking blog, or just an immigrant girl who wants to stay connected to her friends and family through social networking, a day without computer (and internet) can make it a pretty rotten time to pass. For this reason, Scottsdale AZ computer repair shops are found all around. You may be searching for Scottsdale AZ computer services when there is a compatibility problem between hardware and anew software or it can be system crash, on the other extreme, Scottsdale AZ computer repair experts will be happy to fix your jam. Typical computer repair services include:

• Hardware and software troubleshooting and repair
• IT services like network installation and configuration (LAN/WAN setup)
• Attacking and removing spywares/malware and viruses. Also installing anti-virus software for a proactive approach to external attacks.
• Hardware repair: Laptop/Mac/PC, printer, scanner, motherboard; CD/DVD ROM installation etc.
• Website development and presentation, graphic designing. Not all shops will offer these unless they have web designers with them
• Firewall and email security setup
• Windows OS installation and troubleshooting
• Data backup and recovery
• Tutorials to employees for solving small problems in-house

For the above mentioned services you can either call upon individual geeks from the Scottsdale AZ computer repair directory listings online or go for hi-fi companies with a panel of experts. It actually depends on your budget and technical specifications, that is, if you are a home user, an official team leader, or a business owner. Scottsdale AZ computer repair services will be open 24 hours and probably even on Saturdays and Sundays as most businesses like to get repair services on weekends to avoid business disruption. However, if it is urgent you can call the computer experts at your location though you will have to pay them hourly rate. Usually, the diagnostics is done for a flat fee for the first hour. After that the charges increase per hour with the complexity and urgency of the problem at hand.

Scottsdale AZ computer repair services believe in giving exact-fit solution to your problems which means you will be given a customized solution and not a general one. They will also resort to business-centered approach keeping your budget and business mission in mind. You won’t be asked to get expensive software only to push up the repair bill. The best thing is your weakest link will be identified and rectified. The root cause of the problem can be diagnosed and then a pro-active approach will be developed through software installation and quick-fix tips given to employees.

Information On Computer Repair Services

Computer products, including both hardware and software have taken our lives by a storm. The storm brings along the usual- topsy-turvy situations. Exactly when we were overwhelmed with the distinct mark technology made on our lives in the IT field, numerous problems emerged that made us ill-at-ease while enjoying the computer system in the comforts of our home. This is when Portland computer repair is to be looked out for.

If you are living in the state of Portland in US, the above scenario is not new for you. Like any other computer user in your country you are always a target of increased computer inventions. Whether you are a small business, large company, student, elderly citizen or an IT person yourself, sooner or later you need to refer to Portland computer repair services for the tremendous problems any new software or hardware installation brings along.

The good news for all those living in Portland is; you have a large number of computer stores for hardware and dedicated Portland computer repair services for software installation, upgrade, trouble-shooting etc.

Some stores are all pervasive; offering both new gadgets (hardware) and providing repair services for hardware and software up-gradation. They have a panel of technicians available 24 hrs so you don’t have to worry about arranging fixes on a Sunday or sitting back late to attend to them on tiring weekdays.

Some Portland computer repair services go as far as assisting your business in accomplishing a paper-free office, recycling and even re-use of your old hardware in socially responsible programs.

For small businesses with a minimal computer setup and individuals interested in cutting costs, computer geeks are also available for Portland computer repair services. They can come to your home at just a call and save you the trouble of manually taking your heavy hardware to the service station. For small-time problems like viruses, spyware, a stuck printer or PC problems, you can find individual technicians who work at low rates and don’t give you a salesman pitch of buying something from their stores that you need for useless up-gradation.

Comparatively bigger businesses who can hire full-fledged services must be sure to be on the lookout for Portland computer repair companies with a Microsoft IT certificate. This serves as a proof of their good and timely service and as a testimonial to satisfy your apprehensions. From repairing a slow running PC to requiring a company to handle your entire network, you can search for the right team. The services include; IT services and network support, malware/spyware detection and removal, replacement of your motherboard, RAM system and other hardware and software installation, upgrade, repair or just a simple tweak. Some companies charge ZERO for onsite services and Home Visits- for estimates, pick and drop etc.