- Enterpreneurship, Entertainment, General, Growing Business, Industrial Equipments, PC and Technology, Productivity, Sales and Marketing, Start up Business
- beli komputer, beragam komputer, cari komputer murah, jual komputer, komputer desktop murah, paket komputer, pc desktop entry level, pc desktop murah, sedia komputer murah, toko komputer, toko komputer bekasi
Lenovo Everyday Notebook Series
Sempurnakan kegiatanmu dalam bekerja dan bermain dengan notebook Lenovo Everyday Series. Diciptakan dengan performa yang pas untuk menunjang kegiatanmu. Mengerjakan tugas, pekerjaan kantor, browsing internet, chatting, nonton video hingga mendengarkan musik, kini paling pas dilakukan dengan laptop keren yang bertenaga.
Computer Plus @021 8886 6233.
Lenovo Multimedia Notebook Series
Manjakan mata dan telingamu dengan audio visual terbaik lewat display yang tajam, panel yang canggih, suara Dolby yang nyata dan diperkuat dengan prosesor serta kartu grafis terkini. Notebook Lenovo multimedia series akan membawamu ke pengalaman multimedia terbaik.
Computer Plus, @ 021 8886 6233.
Lenovo Gaming Series
Lenovo Gaming Series diciptakan untuk performa terdepan dan didesain untuk menginspirasi jiwa gamers tiap orang.
Lenovo Gaming Series diperkuat dengan prosesor Intel Core i7 terbaru dan berbagai pilihan kartu grafis.
Notebook Lenovo Gaming Series akan membuat pengalaman bermain game menjadi lebih seru. Hadapi lawan lawanmu sekarang !
Computer Plus @ 021 8886 6233
If your computer does not power on at all, the most likely culprits are either Power Supply (desktop only) or motherboard.
No Boot or Blue Screen.
If your computer has power (you see lights, hear fans spinning), but nothing on the screen, or if the computer starts to boot up and then crashes with a ‘blue screen’, there are several possible issues.
NOTE: Any hardware changes must be done while computer is completely powered down and unplugged / battery removed!!
Try Safe Mode – if your computer will boot into Safe Mode, it is a software related issue.
Test Screen – If you hear the computer running, but see nothing on the screen, try swapping monitors or plugging in an external monitor for laptops.
Test RAM – try carefully removing the ram and powering on. Most computers, when functioning properly, will give a long, repeating ‘memory error’ beep. Power off and replace the ram, one stick at a time, powering on when ram is properly seated.
Test Video Card – if your computer has a removable video card, try removing it and either replacing it or plugging your monitor into the built-in video port if available.
If none of these things work, you are likely looking at a failed hard drive, corrupted operating system or failed motherboard. It is best to seek professional services at this time.
Article source :
The power supply unit (PSU) is one of the few items in an electrical device that will affect the performance and reliability of your entire system. It’s often the most undervalued, under-appreciated component within any device, yet one of the first components to cause failure.
This article focuses on the factors to look for when purchasing a PSU for a personal computer, but it may be applied to any application needing a regulated PSU. When following this guide, take into account your own application, and appropriately weigh each factor.
1. Determine the wattage you need.
Use a PSU calculator web page or software to help determine your requirements. Even better is to find a review of a similar system that measures power consumption. As that consumption is measured at the wall, multiply by the review system’s power supplies efficiency to get the output. (If you don’t know, 0.82 will be close or slightly pessimistic.) Don’t purchase a PSU just above your requirements unless you plan not to upgrade the system. Also, PSUs age, losing power over time. Purchase a PSU that will take you through your next few upgrades, over a multiple-year period.
2. Research which connectors you need.
Newer PSUs will often provide both a 24-pin ATX connector that doubles as a 20-pin connector. Higher-end models may only provide a 24-pin connector, and lower-end models may provide just a 20-pin connector. Typically, most Pentium 4 and Athlon 64 CPU-based motherboards (and earlier) will require a 20-pin ATX connector, while newer motherboards require a 24-pin ATX connector. Also, most PSUs will have both a 4-pin and 8-pin auxiliary 12V connector for motherboards, and only high-end PSUs will have one or more 6-pin PCI-E connectors for video cards.
3. Look for PSUs with high-efficiency ratings.
And, ones rated under load temperatures, not room temperatures. Anything 80% and above is good. At 83%, approximately 17% of the wattage is lost as heat. Therefore, a PSU that may be advertised as a 500W PSU, will actually be drawing almost 600W at the wall. Efficiency drops over time and during the life of the PSU. A year-old PSU is most likely not capable of producing the same amount of energy it once did when it was new.
4. Determine the robustness of the PSU.
How well does the PSU handle changes in current? Although not a guarantee, there’s a strong correlation between weight and quality: bigger components (ie, capacitors) equate to a more tolerant, reliable PSU. This is one downside to a 120mm fan: while it does provide quieter cooling, the components to be cooled must be more tightly packed. If you don’t care about noise, an 80mm cooling fan in the traditional place on the rear of the PSU may offer better value.
5. Check the number of rails.
Just as your house’s fuse box includes both a large main breaker and a smaller circuit breaker per circuit to ensure the smaller-branch circuit wires do not overheat, high-capacity PSUs divide their output into multiple “rails,” each with a smaller current limit. The relevant safety standard requires a 20A limit, which is quite generous, given that the wires are smaller than those used in your house to carry 15A. (But there’s the advantage that the wires aren’t hidden in walls, so they’re cooled better, and you’ll smell it if something starts burning.) This, however, makes connecting the PSU more complex; in addition to not overloading it overall, you have to avoid overloading each rail, or it will shut down. A good power supply will make that easy by providing rails totalling much more than the total PSU rating. A cheaper alternative is to provide just enough rails to total the overall capacity, which makes it difficult to use all of a power supply’s capacity. (This may be a clue that the PSU is incapable of delivering its full-rated capacity.) An even cheaper alternative, which has become quite popular, is to eliminate all of the safety circuitry and produce a “single-rail” power supply that can deliver all of its output on any wire. This is technically in violation of the ATX-power-supply specification but has not proved to be a safety problem in practice, and is preferred by many people. A single-rail design isn’t itself a sign of a low-quality PSU.
6. Get a modular PSU.
It will help eliminate extra wires to get in the way of cooling. Ignore the claims by PC Power & Cooling that modular cables create more resistance due to corrosion of contacts. The additional resistance is negligible.
7. Compare the amperage of each voltage.
A PSU’s wattage rating isn’t conducive to determining amperage at any specific voltage. All PSUs will have a sticker with their rated amperage at each voltage level. This information should be provided when purchasing a PSU from an online vendor and visible on the unit’s retail box. As mentioned above, modern computers are 12V-heavy loads. A 500W PSU may sound adequate, but if its 12V amperage is in the low 20s or less (12V times 25A is 300W), it may not be able to power a modern computer.
Original source :