Components full markings added:
PL402: 3.3V - 3.3UH_6.3A_20%_7X7X3_M (+3VALWP) - 3R3-849-111
PL503: 1.1V - 1UH_6.6A_20%_5X5X3_M (+1.2VP) - 1R0-916-RQ4
PL301: 0.0V - 4.7UH_PCMB063T-4R7MS_8A_20% (+17.4V_BATT_CHG) - 4R7-915-CM3
PL804: 1.0V - 0.22UH_24A_20%_ 7X7X4_M (+APU_CORE) - R22-851-096
PL805: 1.0V - 0.22UH_24A_20%_ 7X7X4_M (+APU_CORE) - R22-851-096
PL803: 0.9V - 0.22UH_24A_20%_ 7X7X4_M (+APU_CORE_SOC) - R22-851-096
PL602: 0.9V - 1UH_6.6A_20%_5X5X3_M (+0.9VALWP) - 1R0-916-RQ4
PL401: (short) - 3.3UH_VMPI1004AR-3R3M-Z01_11A_20% (+5VALWP) - 3R3-84...

OK, let me clarify. It's a motherboard DH5JV LA-G021P, the schematics are in [URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/3170622-la-g021p-schematic[/URL]

Let me know if it's enough.

The PL401 is marked with 3.3UH_VMPI1004AR-3R3M-Z01_11A_20% (in schematics) and it's connected to +5VALWP.
The resistance measure is 0.72 both ends (at 20k scale)

Thanks for your patience!

Measurements (both ends)
PL402: 3.3V - 3.3UH_6.3A_20%_7X7X3_M...

Thanks for your response. Yes, I'll take the risk. These are the grey coils voltages:

Measurements (both ends):
PL402: 3.3V
PL503: 1.1V
PL301: 0.0V (battery disconnected)
PL804: 1.0V
PL805: 1.0V
PL803: 0.9V
PL602: 0.9V
PL401: didn't test it (short circuit, shut down)​

Hi, I will appreciate if I can get some advice on my problem.

- I have an Acer Aspire A315-41-R8J9, with Ryzen 5 APU (no GPU).
- The laptop can be started (blue led on) but it shows no picture (blank screen), and it looks to be somewhat active, as the fan spins, and processor gets hot.
- I visually inspected and tested some components, with no obvious issues.
- I disconnected not-essential peripherals.
- When testing PL401, I got sparks, smoke smell, and the Acer logo briefly showed in screen but then shut down.
- I tried to re-flash BIOS from USB (Fn+Esc),...