Hp Probook 4540s Boardview Portable

Finding and using a boardview for the HP ProBook 4540s Go to product viewer dialog for this item.

If the laptop is "dead" (no lights, no fan), you need to check the power sequence. The boardview helps you locate critical test points (polyfuses, MOSFETs, and coils) to check voltages like 3.3V and 5V standby. You can trace the path from the DC jack through the first protection circuit easily. hp probook 4540s boardview portable