The LA-E791P Rev 2.0 uses a dual BIOS configuration (SPI Flash). The schematic details the connection between the PCH, EC, and the BIOS chip (usually Winbond W25Q256).
Check for any potential mistakes in technical descriptions. Even though La-e791p is hypothetical, the components and revisions should align with common practices in electronics. For example, moving from a linear regulator to a switching one for efficiency, or adding ESD protection for robustness. La-e791p Rev 2.0 Schematic Diagram
The on LA-E791P:
| Page | Block | Signals to probe | |------|-------|------------------| | 3 | System block diagram | Traces power flow: DC → ALW → S5 → S0 | | 8 | SIO (ITE8987) | LID_SW#, AC_IN, PWRBTN#, RSMRST# | | 12 | SPI ROM (BIOS) | CS#, DO, DI, CLK (measure with scope on power-up) | | 18 | USB & Audio | USB_OC# (overcurrent faults cause no boot) | | 22 | PCIe & WLAN | WLAN_DISABLE# (high = enable) | | 26 | EC embedded controller | KBC_PWRBTN#, EC_RSMRST# | The LA-E791P Rev 2