Identifying why the motherboard fails to power on (e.g., faulty MOSFETs, capacitors).
| Dell System | Form Factor | Common Issues | |-------------|-------------|----------------| | OptiPlex 7040 | SFF / MT / Micro | No power, USB overcurrent, fan full speed | | OptiPlex 5040 | SFF / MT | No POST, RAM slot failure | | OptiPlex 3040 | SFF / MT | Dead after BIOS update | | Precision T3420 | Tower | Voltage regulator short | Dell E93839 Motherboard Schematic High Quality