Corruption in the 4MB SPI Flash chip is a common cause of "Dead" or "No Display" symptoms.
Integrated AMD Radeon or Discrete R5 M330 (depending on sub-model) La-c781p Schematic
Essential for probing the tiny pins of the KB9022Q or measuring voltage drops across SMD resistors. Are you currently seeing standby voltages on the coils, or is the board completely unresponsive? Corruption in the 4MB SPI Flash chip is
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The Circuit Bench Reading time: 4 minutes La-c781p Schematic