This is the manufacturer of the raw, unpopulated PCB. HannStar Display Corporation is a major Taiwanese electronics giant specializing in displays and bare circuit board fabrication.
This guide covers the board specifications, how to find the correct file, the software required to view it, and how to navigate the HannStar J MV-4 layout for repairs. hannstar j mv4 94v0 e89382 boardview exclusive
| Marking | Full Meaning | Function | | :--- | :--- | :--- | | | HannStar Board Corporation | PCB substrate manufacturer (not the motherboard brand) | | J MV-4 | Internal production batch code | Product series designation for the bare PCB | | 94V-0 | UL94 Vertical Burn Rating | "Flame retardant" — stops burning within 10 seconds | | E89382 | UL File Number | Manufacturer identification number registered with UL | This is the manufacturer of the raw, unpopulated PCB
If you suspect a faulty component—for example, the charging IC—type its motherboard designation (e.g., PU1 or U24 ) into the search bar. The software will instantly zoom to the chip. Step 3: Map the Network (Nets) | Marking | Full Meaning | Function |
Because "Exclusive" usually implies hard-to-find or paid files, here is the reality of finding this specific file:
If the 19V rail is stable, search the boardview for the Power Management IC (PWM controller). Find the coils responsible for generating the +3V_ALWAYS and +5V_ALWAYS states. Click on these rails in the software to identify easy-to-reach test points on the physical board where you can inject voltage or check for short-circuits to ground. 4. Trace Hidden Component Connections
: A paid, feature-rich tool preferred by professional repair shops for its overlay features.