Your question is so general that there can only be a general answer.
1. Physical check: damage, corrosion, loose parts, faulty soldering, wiring or connectors.
2. Electrical check: does it work according to specification?
To grind a circuit board, the individual electronic components have to be removed first. The circuit board is usually ground industrially and recycled for a number of functions.
Control board
A printed circuit board
By using a multimeter
The standard m3 screw size for securing electronic components in a circuit board is 3 millimeters in diameter.
A cicuit board is a board made of plastic and metal interconnections where the various electronic devices are assembled in discrete form to make up the circuit.In an integrated circuit a semiconductor chip is so processed such that the various electronic devices and components are directly grown on it.
Removes solder from electronic components so that they can be removed from the circuit board
A circuit board. Motherboards are just special names for circuit boards. Some specially designed computers, microcontrollers, or other electronic devices might have special names for their main boards, or they might just have one board.
Now days everything and that is no exaggeration if you have an electronic device there is a printed circuit board in it
Aloha: Uila [ooweelah] added to the end of whatever (like; electronic motor [ ], electric circuit board [ ], etc).
A printed circuit board (PCB) is a flat board made of non-conductive material that holds electronic components and provides electrical connections between them. It serves as a base for assembling and mounting electronic circuits. The board features a network of copper traces or conductive pathways, called traces, that allow the flow of electrical signals and power between components on the board. PCBs are widely used in various electronic devices, ranging from smartphones and computers to industrial equipment and automobiles. metalbee.lv/en/faq/
Vero board, also known as perfboard or protoboard, is a type of circuit board used for prototyping electronic circuits. It features a grid of holes that are pre-drilled, allowing for the easy insertion of electronic components and wires. Users can solder components to the board to create temporary or permanent circuits without the need for a printed circuit board (PCB). Vero boards are popular among hobbyists and engineers for their versatility and ease of use in circuit design.