Dell laptop repair-chip-Tips

Some necessary conditions:
1. Technology
The technology is to analyze a poor motherboard Based on the signal and circuit principle (or related datasheet), and make a correct judgment between the expected value and the measured value, which depends on my rich work experience, learning ability, observation ability, testing experience and question inference ability.
2. Instruments
In the face of motherboard analysis, there are all kinds of electronic parts, their combination or logic, the most common form of expression is nothing more than voltage, frequency, waveform, and impedance, etc, in order to obtain the accurate parameters of these circuits, a corresponding measuring instrument must be available. The quality of the instrument determines whether an inference is correct. Without analyzing instruments, you will never be able to explore problems on your own. Instead, you can only rely on the experience of others to share, although there are top issue in various electronic products, but there is no reason to say that the same part is always bad. It is also because of this that a variety of instruments are needed to deal with different problems. One type of resistance card is to speed up the work and solve some points that cannot be detected without drawings, while the oscilloscope and electric meter are used to present an electrical parameter.
3. Materials
In the face of sufficient understanding and problem analysis, find the problem and still need enough materials (chipset, power IC, MOSFET, function chip, Flash ROM) to replace potential defective products you suspect.
4. Device
When both materials and fault points are met, some parts cannot be solved by commonly used ferrochrome tools, which puts forward higher requirements for friends, in particular, the BGA-encapsulated north-south bridge chipset cannot replace these BGA chips without dedicated tools, and thus cannot end a reasonable judgment. The final result is to disappoint the customer.