What is a diagnostic card?
When calculating, diagnostic tools are often required to remove problems, especially if there is a problem with computer hardware. One of these tools is called a diagnostic card, which is also referred to as the Power On Self Test (POST) diagnostic card. It is usually inserted into one of the slots to connect the peripheral components of the computer (PCI) to start diagnostics. With the diagnostic firmware installed, the card tests different computer systems to find out where it went. In principle, it checks computer hardware for errors or symptoms of serious hardware problems by examining error codes created by the basic input output system (BIOS).
BIOS is pre -installed software in the computer's motherboard. It usually starts before the installed operating system begins to load. This system keeps computer hardware under control and makes sure everything runs smoothly on the hardware side. BIOS is access to software by a diagnostic card so it can doChild tests on hardware. They connect the interconnection and check the problems with the computer memory, the central processing unit (CPU), the display card and other key hardware components.
When repairing a computer, the diagnostic card can be very useful in determining the problem, especially if there is no display on a computer monitor or if the computer is completely frozen. When the machine hangs and fails to restart or run again, the best chance to determine the problem is to check the hardware. The diagnostic card is often the key to determining where everything has gone wrong, and in fact tells in which direction the problem is to be corrected.
The diagnostic card works by detecting and reporting error code generated by a motherboard. These codes are called beep codes. The motherboard must have functional BIOS and CPU to communicate with diagnostic tools. This diagnostic card will be unnecessary,If the computer's motherboard is already fried. If this still works, diagnostics can still be done without a computer monitor connected to the system. The speaker can show errors via sound beeps.
Diagnostic cards are specially designed to discover and report errors found in the computer motherboard. This means that it will not be able to detect problems in devices connected to computer slots and ports such as external hard drives, monitors, keyboard, mouse and speakers. Not all manufacturers use the same set of codes on their hardware products, so it is often recommended that you choose a compatible diagnostic tool before using on a computer.