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Modern IT products—such as desktops, laptops, servers, networking devices, and peripherals—are built upon a vast ecosystem of electronic components. Understanding these components is essential for troublesh…
A Switch Mode Power Supply (SMPS) is one of the most important parts of a desktop computer or server. It converts AC mains electricity into regulated DC voltages required by the motherboard, processor, storage …
An EPABX (Electronic Private Automatic Branch Exchange) is a private telephone switching system used in offices, factories, hotels, hospitals, schools, apartments, institutions, and other organizations to conne…
A computer motherboard is the central printed circuit board that electrically connects and coordinates the processor, RAM, storage devices, graphics hardware, USB devices, network interfaces, firmware, power su…
Routers are specialized networking devices that combine digital processing, Ethernet interfaces, radio-frequency circuitry, flash storage, power conversion, and firmware in a compact PCB. When a router fails, r…
Inkjet and ink-tank printers combine precision mechanics, fluid-handling systems, sensors, motors, power electronics, digital control circuits, and firmware. A fault that appears to be a simple "printer not wor…
Chip-level repairing of a laser printer means diagnosing and repairing faults at the electronic component, circuit, PCB, connector, sensor, power-supply, and controller-board level, rather than simply replacing…