Troubleshooting tips hard drive

One day you wake the computer up and not see the familiar Windows logo appears, instead, the screen went blank, a warning appears several "cryptic" or some "beep beep ..". Be calm. Some start up problems are overcome by the simple solution to ... unexpected.

1. Do not worry: blank screen or a problem in the boot process is not always due to corrupted hard drive. Hard disk is now often longer than other parts of the PC, as well as running the system utilities are not needed and reinstall or replace hardware.

Learn about RAID

ALL ABOUT RAID CONTROLLER.

In late 1980 and early 1990, the provider of information technology services was faced with increasing a tremendous amount of stored data. The storage technology is becoming very expensive to put a large number of high-capacity hard drives on servers. RAID was born on the problem.

RAID is defined how? First RAID stands for Redundant Array of Inexpensive Disks (system backup disk). This is the operating system by connecting a series of low-cost drives together to form a single storage device with large capacity to support efficient and reliable than previous solutions here. RAID is used and the methods deployed in the enterprise storage and servers, but in 5 years RAID has become common for all users.

The advantage of RAID

There are three main reasons for the application of RAID:

Inside broadband router

The broadband router is used increasingly popular and with the launch of a highly integrated controller chips today are making the broadband router to only a few components are made at the plant - it have contributed to reducing the cost of this device. Let's see a bit of components inside the router.

Figure 1: Inside a broadband router

How to reload the firmware for usb flash disk, UFD Repair

In this example I use UFD JOGR older, run communication IC's Alcor AU6981

Run the software for IC communication AlcorMP AU6980/6981 following form (Figure 1)

SOLUTION FOR MOTHERBOARD BIOS SAVING PROBLEM

MOTHERBOARD BIOS SAVING PROBLEM

1. CMOS Battery jump check (if any) have been set correctly.

Card Guide Test Mainboard

MOTHERBOARD REPAIR USING TEST CARD

Manual motherboard test card Currently, the market is selling a motherboard test card origins from China, all Chinese guidebook you should have many questions about how to use. Through this article we're looking to get some basic knowledge to use.

MOSTFET experience equivalent replacement

Experience replacing MOSFET equivalent First I will practice with MOSFET 60N03 named by alldatasheet investigation shall be the full name of the bear NTD60N03 60A (This is the most important) 28V withstand voltage.

Reset pulse common errors and how to handle

After checking the main power supply on board is good, CLK pulse is good, then we would be interested in "Reset pulse."
Reset pulse so what?
- To easy to imagine I have two examples:
Speaking on the computer before the offline resources: When you press the power button ON the computer, the computer will first perform the POST (Power ON Salf Test) translates "the basic test when turned on" a form list of all devices when calling device, the device must be answered "yes", otherwise it will call its name forever and code will appear Hoai on "card test" also known as "post card ". If you have "roll" is finished, it will test the code on the card, and FF load carried in the boot disk to boot the operating system. Somewhat difficult to understand, only the second example.

The test procedure is important when Motherboard repairing

1. Check the circuit source file:
- Most of the main CPU is not needed (except the main INTEL CPU is required to have a new source file.)
- If the source file must not try to remove the 12V connector (4pin) to test if the file is 100%, the problem lies in VRM circuits was slow.
- Click the juice: if the error is only slightly MOSFET island or something, kic presses will run normally. Pressed file that is not heavy and it is slow.
- Measure the 5V (or 2v5-> 5V) in PS-ON pin. If lost: Detect Pin PS-ON -> Chip NAM or SIO. On any guy beat that guy. (If the test chip NAM quartz source and replace the chip again try it)
- Tune in MOSFET island (or islands IC): true blue -> (through) port island (or direct) -> SIO; Dam SIO port or island.

Clock pulse generator circuit of the common mistakes and how to handle

NOTE:
Including an IC circuit and a quartz clock comes 14.3.
Just find the IC Quartz 14.3 is next to the clock IC.

Duties:
Generated 14.3 MHz quartz oscillator is 14.3 MHz standard, then the clock pulse generator circuit would get from standard quartz oscillator and then multiplied by a certain percentage to create different frequency clock pulse supply for the components of the motherboard.

SIO chip common problems and how to handle

Chip Super I / O for short SIO

How to identify:
- Rectangular, about 4 cm square have the ITE, Winbond, SMSC ... like this;


Avoid confusion with the SIO chip LAN chip onboard (same size, but he usually comes a 25 000) a few onboard sound chip has the same size but less than that. Remains the third most common type of chip should be less confusion.
Duties:
- In conjunction with NAM chipset and manage the source file for the main power off.
- Management keyboard, mouse, FDD, LPT.

South Bridge common errors and how to handle

Southbridge - South Bridge Chip (I / O Control Hub: ICH)

NOTE:
- The second largest on the main (only losing Chip North Bridge)
- There are two large chips, north bridge chip is the first chip, the rest is the southbridge

North bridge the common errors and how to handle

*Biggest chip on the motherboard.
*Usually add a piece of radiator.
*Located near the CPU and RAM.


Does not identify CPU (CPU not running, similar to open socket CPU)
RAM not recognized (the source case was sufficient RAM): RAM is not trying hard long Beep speaker does not beep anymore no RAM or beep continuously.
Do not get VGA (AGP source case or sufficient PIC-E) (or take onboard VGA) Main Test Report Card code 25 or 26 (good kind of course is offline card, funny card, the main new new test is 26 on any error Failed to load or what is also 26).

unrecognized USB

The difference is "very important" as the keyboard and mouse PS / 2 is also managed by the SIO chip USB ports because "chipset South" by managing.

Under this scheme, we found it no different than keyboard and mouse should be damaged and treatment is quite similar to keyboard and mouse.

No keyboard and mouse

No keyboard and mouse
Need to distinguish communication standard keyboard and mouse are PS / 2 . There is a spare USB port or just until the port ps / 2 is omitted.
In this article I just mentioned the standard keyboard and mouse PS / 2 only.

What is Super I / O ?

Circuit synthesis Super I / O is connected to south bridge chipset in a motherboard diagram chuSuper I / O is an integrated chip on the motherboard functions mediated communication between the south bridge chipset and interfaces periphery. Super I / O is often seen on the previous motherboard. The chip Super I / O is often used for communication with peripheral devices have low bandwidth.

Super I / O often provide at least the following functions:

The controller of the floppy drive (floppy controller)
Controller for one or two serial ports (serial port controller)
The controller for the parallel port (parallel port controller)
The actual chip Super I / O expansion also integrated other features, such a chip Super I / O is the symbol of SMC LPC47M102 on the motherboard's ATX Intel VC820 can integrate out three features as above has added the following features:

USB buying tips

USB is one of the objects separated by any person or use a computer. However, not everyone knows the secrets to purchase this product. Here are some tips.

On the market exist two types of memory cards with two different standards are 1.1 and 2.0. Same storage capacity, but the difference in price between the two types can vary up to $ 10. USB 2.0 is faster than 1.1 speed a lot. Speed data entry of type 1.1 is 12 Mb / seconds remaining 2.0 is 480 Mbps. Typically, USB 2.0 can be distinguished on the device, packaging and documentation.

clear cmos password

Set CMOS password is considered one of the very effective measures to computer security. CMOS password breaking is a very difficult but not impossible. But for the successful implementation also requires you to have a "skilled" certain.

There are several ways to break the CMOS password, such as replacement BIOS chip, BIOS chip circuit, use jumper, remove the battery on the motherboard, breaking the CMOS password with a number of commands, enter the default password of the manufacturer ... but for world computing "ordinary academic" as the appliance we have two methods that can apply to be temporary.

Recover bad sectors on your hard drive

Recover bad sectors on your hard drive
Hard life for over two years using it often fails, a number of sectors will not be used anymore, but it is often referred to as Bad sector. The cause may be because most of the hard work of instability is often called physical damage.



For this reason, the ability to recover is very low and not ordinary users can do that requires the technician to professional. They also have to mention potential damages caused by software such as viruses by vandalism, power outages while working, install and uninstall software not properly ... system will also be listed in the Bad Sector list that actually it is still used. Bad sector to get back there is no other software can make a better program of Dposoft HDD Regenerator.

CRT Monitor block diagram

BLOCK DIAGRAM OF CRT MONITOR


Light color image: a color picture signal components and integrated into a video image by scanning principle, with three monochrome images are generated on the color picture tube through which the principles of color mixing color image synthesis is displayed with full color.