Someone had known. Someone had left a fix for a disaster they weren’t allowed to admit existed.
The is the motherboard part number for the Lenovo IdeaPad S340-14IIL Go to product viewer dialog for this item. and S340-15IIL Go to product viewer dialog for this item. la-h103p schematic
| Symptom | Likely Fault | Schematic Section | | :--- | :--- | :--- | | No power, USB-C meter shows 0.3A | Dead TPS65987 PD Controller (U600) | Page 4 (USB Power) | | Power cycles every 2 seconds | Corrupted EC firmware or short on +1.8V rail | Page 12 (1.8V LDO) | | Turns on but no display | Blown backlight fuse (PF1) or failed +3.3V_LCD | Page 45 (Display Connector) | | Fan spins fast, no POST | Missing +1.05V_PCH (VCCIO) | Page 28 (PCH Power) | | No sound from speakers | Amp IC (MAX98357) has no +5V_AUDIO | Page 52 (Audio Codec) | Someone had known
Unveiling the LA-H103P Schematic: A Comprehensive Guide and S340-15IIL Go to product viewer dialog for this item
