Cómo reparar un TV desde cero: fallos y soluciones PASO a PASO

✅ How to REPAIR a TV that turns ON and OFF by itself – STEP by STEP from SCRATCH (OKI V19A-PH) 🔧 In this tutorial, I explain clearly and safely how to diagnose and repair an OKI V19A-PH TV with a power loop (it turns on and off by itself). We'll start from scratch: basic checks, multimeter measurements, and verification of the control lines to find the real fault without overspending. 📍 Content in Spanish from Spain. Ideal for technicians and hobbyists who want to save money and time by avoiding unnecessary part replacements. 💡 What you will learn (step by step): 1) Initial safety tests and elimination (cable, plug, abnormal standby power consumption). 2) Measuring standby voltages on the power supply. 3) Control signals between the main board and the power supply: • P_ON / PS-ON (power supply on) • STBY (5V standby / logic) • BL_ON / PWM_DIM (backlight, if applicable) 4) Backlight and protection check (if the light tries to turn on and fails). 5) Electrolytic and SMD capacitors: how to detect high ESR and leaks. 6) Inspection of cold solder joints on connectors, regulators, and chokes. 7) Main board testing (linear/DC-DC regulators, resets). 8) Criteria for deciding whether to repair or replace modules. 🧰 Recommended tools: • Digital multimeter • LED strip tester (current-limited) • Magnifying glass and light for SMD inspection • Isopropyl alcohol and cleaning brush ⚠️ Safety: Works without voltage, discharges capacitors, and does not bypass protections. Mark connectors and take photos before disassembling for proper reassembly. 🎯 Objective: Restore stable operation of the OKI V19A-PH by identifying the real cause of the "looping power": unstable power supply, backlight protection, main regulators, or underpowered capacitors. 🔹 Technical terms in English for premium ads: TV repair, troubleshooting, power supply, main board, LED backlight test, PS-ON, 5V standby, PWM dimming.