However, I can provide a of what a schematic like the LA-G121P (commonly associated with Lenovo’s Gen 6/7 series, e.g., ThinkPad E14/E15 AMD or Intel variants) typically contains, and what a repair technician should look for when reviewing it.
Remember: Always start at the power tree. Check ACDET , REGN , and +3.3V_ALW . If those are present, move to the PMIC enable signals. With the LA-G121P schematic open on a second monitor and a steady hand with your oscilloscope, that "dead" Dell will boot to BIOS in no time. la-g121p schematic
The first few pages usually contain the block diagram. This shows how the CPU connects to the PCH (Platform Controller Hub), the RAM slots, the GPU, and the I/O ports. If you have a dead USB port or no display, the block diagram tells you which controller chip is responsible. 2. The Power Sequence Logic However, I can provide a of what a