The Lanrui V9 is a fault detection agent (“spray / liquid agent”) used in electronic repair work. 

 

It’s designed to help identify faults in electronic components or on motherboard circuits — things like short circuits, leakage, or problematic/defective components.

 

Importantly, it is non‑residue / no residue formulation: after application, it does not leave behind harmful residue which could damage components.

 

 

⚙️ Key Features

 

 

Shows fault points clearly so repair technicians don’t have to guess. 

 

Quick detection: use a little agent on the suspected area, power up the board, and observe signs of issue. 

 

Safe for delicate electronic circuits, because the chemicals are formulated to avoid corrosion or damage. 

 

 

🛠 Why It’s Useful

 

 

Speeds up diagnostic work, especially on motherboards or PCBs where faults are not visible.

 

Helps reduce risk of making unnecessary part replacements because you can identify exactly which component or area is faulty.

 

Because it leaves no residue, there is less risk of after‑damage (e.g. shorting, corrosion) from the detection process.