Laptop Repair

A laptop is a simple and compact computer. Yet, its compactness is the reason for its intricacies and complications. For instance, while most normal PCs have a mother board that has different ports for different other components of the computer to be attached, a laptop on the other hand, has a mother board that has a lot of things that are built into it, instead of sections where other parts can be attached. An example here can be given of a sound card, which often comes as a separate part for older PCs and has to be attached to the motherboard of a computer. However, the sound and video display card is integrated with the mother board in case of the laptop.

It is for these reasons that the motherboard is perhaps the most important part of a laptop after the processor. It is also not easy to repair a laptop motherboard because of its immense intricacies. While repairing a motherboard one has to be extremely careful and cautious.

Whenever a problem is arises with a motherboard, one should not take the risk of repairing it themselves since if it is not done properly it can lead to irreparable damage to the entire laptop. It is usually safe to approach a dealer of a laptop for the repair of its motherboard. They have technicians who have an expertise in dealing with laptop motherboard problems and can make the right diagnosis and carry out repairs.

There are many self employed people who repair laptops and are often a much cheaper option. One can approach them to repair their motherboard, but a few things should be kept in mind. The most important is to know their experience in repairing laptop motherboards. Let them not convince and fool you by saying that they have repaired many PC motherboards since laptops and PCs are a different thing all together.

Secondly one needs to ask them whether they have previously repaired laptops of the make that you have. If they have done so, they would be aware of the intricacies of the work and can be a safe bet for laptop motherboard repairs.

Laptop motherboard repair needs expertise and experience and it is best left to the experts.

Laptop Repair provides detailed information on Laptop Repair, Laptop LCD Repair, Laptop Hinge Repair, Laptop Repair Manuals and more. Laptop Repair is affiliated with Used Laptops.

Article Source: http://EzineArticles.com/?expert=Seth_Miller

motherboard troubleshooting

Before you begin, download a few of our Diagnostic Software Tools to pinpoint possible problem areas in your PC. Ideally, troubleshooting is best accomplished with duplicate parts from a used computer enabling "test" swapping of peripheral devices/cards/chips/cables. In general, it is best to troubleshoot on systems that have been leaned-out. Remove unnecessary peripherals (soundcard, modem, harddisk, etc.) to check the unworking device in as much isolation as possible. Also, when swapping devices, don't forget the power supply. Power incompetency (watts and volts) can cause intermittent problems at all levels, but especially with UARTS and HD's.

Inspect the motherboard for loose components. A loose or missing CPU, BIOS chip, Crystal Oscillator, or Chipset chip will cause the motherboard not to function. Also check for loose or missing jumper caps, missing or loose memory chips (cache and SIMM's or DIMM's). To possibly save you hours of frustration i'll mention this here, check the BIOS Setup settings. 60% of the time this is the cause of many system failures. A quick fix is to restore the BIOS Defaults. Next, eliminate the possibility of interference by a bad or improperly set up I/O card by removing all cards except the video adapter. The system should at least power up and wait for a drive time-out. Insert the cards back into the system one at a time until the problem happens again. When the system does nothing, the problem will be with the last expansion card that was put in.

B.)RESETTING CMOS.

Did you recently 'flash' your computers BIOS, and needed to change a jumper to do so? Perhaps you left the jumper in the 'flash' position which could cause the CMOS to be erased.

If you require the CMOS Reset and don't have the proper jumper settings try these methods: Our Help Desk receives so many requests on Clearing BIOS/CMOS Passwords that we've put together a standard text outlining the various solutions.


C.)NO POWER.

Switching power supplies (the most common used PC's), cannot be adequately field-tested with V/OHM meters. Remember: for most switching power supplies to work, a FLOPPY and at least 1 meg of memory must be present on the motherboard. If the necessary components are present on the motherboard and there is no power:
1) check the power cable to the wall and that the wall socket is working. (You'd be surprised!)
2) swap power supply with one that is known to work.
3) if the system still doesn't work, check for fuses on the motherboard. If there are none, you must replace the motherboard.


D.)PERIPHERAL WON'T WORK.

Peripherals are any devices that are connected to the motherboard, including I/O boards, RS232/UART devices (including mice and modems), floppies and fixed-disks, video cards, etc. On modern boards, many peripherals are integrated into the motherboard, meaning, if one peripheral fails, effectually the motherboard has to be replaced.* On older boards, peripherals were added via daughter boards.

*some MB CMOS's allow for disabling on-board devices, which may be an option for not replacing the motherboard -- though, in practicality, some peripheral boards can cost as much, if not more, than the motherboard. Also, failure of on-board devices may signal a cascading failure to other components.
1. New peripheral?
a) Check the MB BIOS documentation/setup to ensure that the BIOS supports the device and that the MB is correctly configured for the device.
(Note>> when in doubt, reset CMOS to DEFAULT VALUES. These are ) (optimized for the most generalized settings that avoid some of) (the conflicts that result from improper 'tweaking'. )
b) Check cable attachments & orientation (don't just look, reattach!)
c) If that doesn't work, double-check jumper/PnP (including software and/or MB BIOS set) settings on the device.
d) If that doesn't work, try another peripheral of same brand & model that is known to work.
e) If the swap peripheral works, the original peripheral is most likely the problem. (You can verify this by testing the non-working peripheral on a test MB of the same make & bios.)
f) If the swap periphal doesn't on the MB, verify the functionality of the first peripheral on a test machine. If the first peripheral works on another machine AND IF the set-up of the motherboard BIOS is verified AND IF all potentially conflicting peripherals have been removed OR verified to not be in conflict, the motherboard is suspect. (However, see #D below.)
g) At this point, recheck MB or BIOS documentation to see if there are known bugs with the peripheral AND to verify any MB or peripheral jumper settings that are necessary for the particular peripheral to work. Also, try a different peripheral of the same kind but a different make to see if it works. If it does not, swap the motherboard. (However, see #D below.)


2. Peripheral that worked before?
a) If the hood has been opened (or even if it has not), check the orientation and/or seating of the cables. Cables sometimes 'shake' loose or are accidentally pulled out by end-users, who then misalign or do not reattach them.
b) If that doesn't work, try the peripheral in another machine of the same make & bios that is known to work. If the peripheral still doesn't work, the peripheral is most likely the problem. (This can be verified by swapping-in a working peripheral of the same make and model AND that is configured the same as the one that is not working. If it works, then the first peripheral is the problem.)
c) If the peripheral works on another machine, double-check other peripherals and/or potential conflicts on the MB, including the power supply. If none can be found, suspect the MB.
d) At this point, recheck MB or BIOS documentation to see if there are known bugs with the peripheral AND to verify any jumper settings that might be necessary for the particular peripheral. Also, try another peripheral of the same kind but a different make to see if it works. If not, swap the motherboard!


E.)OTHER INDICATIONS OF A PROBLEM MOTHERBOARD.

1. CLOCK that won't keep correct time. >>Be sure to check/change the battery.

2. CMOS that won't hold configuration information. >>Again, check/change the battery.

Note about batteries and CMOS: in theory, CMOS should retain configuration information even if the system battery is removed or dies. In practice, some systems rely on the battery to hold this information. On these systems, a machine that is not powered-up for a week or two may report improper BIOS configuration. To check this kind of system, change the battery, power-up and run the system for several hours. If the CMOS is working, the information should be retained with the system off for more than 24 hours.


F.)BAD MOTHERBOARD OR OBSOLETE BIOS?

1. If the motherboard cannot configure to a particular peripheral, don't automatically assume a bad motherboard, even if the peripheral checks out on another machine -- especially if the other machine has a different BIOS revision. Check with the board manufacturer to see if a BIOS upgrade is available. Many BIOS upgrades can be made right on the MB with a FLASH RAM program provided by the board maker. See our BIOS page for more information.

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