HDD Printed circuit board (PCB) with board number G3918A is usually used on these Toshiba hard disk drives:
The G3918A Toshiba PCB repair process can usually be divided into 2 steps: find a replacement PCB and firmware transfer.
G3918A Toshiba PCB: Board Number
Finding a donor Toshiba PCB board is easy, you just need to open the hard drive and find the board number like “G00***” on the board. The following picture shows the board number of G3918A Toshiba PCB.
G3918A Toshiba PCB: BIOS Chip
The BIOS chip on the PCB board is very easy to find. The 8pins chip is the BIOS chip. If the chip is not found on the board, you need to exchange the main chip (the largest chip). The following picture shows the BIOS chip of G3918A Toshiba PCB.
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BIOS chip holds unique data (firmware) required to access the hard drive system area. If PCB firmware is missing or incorrect, there is no access to the hard drive, and no access to user data, so the process of BIOS chip repalcement is also called firmware transfer.
PCB Board firmware transfer tool: hot-air gun, tweezers, screwdrivers
G3918A Toshiba PCB: Repair Video
The following video from YOUTUBE shows the repair process of G3918A Toshiba PCB.
G3918A Toshiba PCB: PCB Supplier
HDDZone.com is a trusted hard drive pcb provider, you can find all kinds of hard drive pcb for data recovery need. You can search with the board number G3918A on it, good luck!