Unofficial hardware firmware channels on messaging apps (like the BIOS ARCHIVE on Telegram) routinely index flat BIOS files and schematics for laptop or AIO platforms.
On many compact 35W power ICs (think: USB-C chargers, LED drivers, or buck converters), laser etching is notoriously hard to read. Under a microscope, IPKBL SR could easily be: ipkblsr 35w schematic
If the schematic is truly lost, the last resort is reverse engineering. For a 35W unit, this is feasible. Required tools: or buck converters)
: Controls low-level functions like power-on sequence and fan speed. Where to Find Replacements ipkblsr 35w schematic