✅ 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.