Because these marks are printed on thousands of different boards produced by HannStar, searching for them will yield a confusing list of unrelated devices—from laptops to Samsung TV boards and industrial router boards . How to Find the Real Schematic

Common laptops that utilize a board with these HannStar markings include:

Another frequent user of this PCB material. Critical Troubleshooting Steps

The markings are among the most frequently misunderstood labels in laptop and industrial electronics repair. While they appear prominently on motherboards used by brands like Lenovo, Acer, and ASUS, they do not actually represent the board's unique model or schematic name. Decoding the Labels

Inspect MOSFETs near the power stages for physical burns or discoloration.

Check the inductors (coils) for continuity to ground in diode mode to identify short circuits.