Dell Inspiron M5030 Not Powering On - Voltage Readings for PL4301, PU4301, PU4502, PU4601

The discussion revolves around a Dell Inspiron M5030 that is not powering on, with users analyzing voltage readings from various components including PL4301, PU4301, PU4502, and PU4601. The motherboard model CN-091400 is identified, and users inquire about the ALW voltages and the presence of power at specific points. The absence of voltage on PL4602 and PL4601 is noted, leading to suggestions for further measurements and checks for short circuits. The conversation also touches on the importance of using a proper service power supply and the potential damage caused by using an incorrect one. Users share their findings regarding voltage levels and resistance measurements, indicating issues with components like PU4603 and PL4901. The need for a clearer understanding of the circuit and component testing is emphasized, particularly regarding the identification and testing of transistors.
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