Assuming no other internal damage has been done, fixing the issue is a simple case of buying a new power supply. There are four screws holding the actual PSU to the case, and numerous power leads leading to the motherboard and every major component. Hard disks contain many moving parts - platters of metal that spin at thousands of revolutions per second with a precision head that moves over to read their data - so wear and tear is to be expected.
Any kind of knock may also cause scratching, leading to an unreadable disk. Generally speaking, a faulty hard disk will fail within its first three months; once you're past that, expect a long and healthy life. Hard disk problems can also manifest in a variety of ways, from slow reading of large files to random crashes. With critical hardware failures, you may even hear the hard disk physically grinding itself, or clicking loudly as the read head tries and fails to move into place.
Sometimes you'll have time to pull some of your data off first, often not. Replacing the actual drive is trivial, and a good chance to upgrade to a larger capacity. The problem is the data. In most cases, it's safe to say it's completely unrecoverable without costing tens of thousands of dollars for specialist services. We really can't possibly emphasise more how absolutely critical it is to take regular backups of your data.
Read my own account of the triple backup system I've got in place for my Mac for ideas. Again, moving parts can lead to wear, and fixings may come loose with constant movement. Fan problems can either manifest by overheating - which your computer should automatically shut down to protect itself from - or more usually in the form of a loud whirring sometimes fixed by giving your case a whack - but don't do this! To fix a faulty fan, open your case up and identify which fan isn't spinning, or where the noise is coming from precisely.
A build-up of dust can also be a cause of blockage, so you really ought to clean the fans off once every six months or so.
Remember than a non-spinning fan may also be caused by a faulty power supply, so try changing the PSU first before diagnosing a faulty fan. This is called reseating. Sometimes you have to repeat the process a few times. The bad electrical contact occurs as a result of a gap opening up, or a bit of corrosion or dust getting between the electrical contacts. Reseating works in very many cases.
This is much the same problem as with the memory modules, except the video card need to be reseated. Of course, your computer may not have a separate video card. Furthermore, if you have a laptop and it has a separate video card, then you can only get to the video card if you take the laptop base apart. Laptops are really unfriendly in this matter.
Unless you have experience, or you can find a step by step guide to disassembling the laptop base, don't do it yourself. Particularly if your have been moving a computer around, or you have opened the case for any reason, it is perfectly possible that a cable is loose or there is not a good electrical connection. It is always worth a try to recheck cables by removing and re-attaching each in turn. The cables to be mainly concerned about are the ones that connect the hard drive to the motherboard and the cables from the power supply unit that connect to the motherboard.
If you computer is completely dead when you turn on, that is no fans, no lights, nothing, the your power supply may have failed. This is not uncommon. Replacing a power supply is easy and not that expensive. If you are a novice, just disconnect all power supply cables, unscrew the unit and take it to a computer supplier.
If you do this you will ensure that you get a new one that will have the connectors you want and the right strength in output Watts. If you have a laptop, check that the battery is connected properly. Remove the battery and reattach with a bit of a hard shove in case there is an electrical contact problem. If this does not work, it might be that the battery has no charge. Either the battery is failing or the supply of electricity to the battery is failing.
Take a look at the socket where the lead from the battery charger goes. If there is a thin pin in the socket, is it very wobbly. It is not uncommon for someone to trip on the battery charger lead and break the socket where the battery charger lead attaches. It is also possible that the battery charger has died. Generally, if a computer turns on, LEDs light up, the hard drive makes a few noises and some text appears on the initial screen, then the probable reason for boot failure is the operating system.
When the operating system fails to start and the hardware is not a fault, it will be because one or more essential files that the operating system needs to start have come corrupt or missing. The two most probable causes of this are:. If it is a matter of missing files or files that do not read, then running software such as Spinrite can make a difference.
Spinrite will often repair files and make them readable again. Following a scan and repair by Spinrite, you may be lucky to get operating system to boot up again.
If you are lucky, take immediate steps to back up whole hard drive using good software such as Acronis True Image. Vibration 7. Signal screening 8.
Cable separation 9. Power conditioning Site-specific environment. When we look at computer hardware solutions fit for industrial applications, there are a many possible solutions available, but they can be broadly categorised as :.
Often, many of the problems above arise from commercial computer hardware typically designed for benign rather than challenging environments. Where possible, replace commercial components with appropriate industrial-grade equivalents.
Where some hardware must remain commercial computer consider if this can be re-engineered or re-packaged for industrial applications, without reducing operational life, reliability or product warranty. For large scale programmes, we would typically revise the equipment design or repackage solutions to deliver optimised volume manufacture. This will provide a balance of high-speed build times with minimised modification costs, and as the overall volume increases, will secure a more cost-effective solution when compared to modifying existing equipment on a case by case basis.
The second approach is best used where the number of implementations is low but the volume of equipment installed is high.
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