Sony Bravia TV's red light is blinking 2 times, how can we solve this problem? It is in this presentation. This solution applies to all Sony Bravia Smart Android LCD/LED TVs and provides information about its Processor MT5566GQVT. The red light blinking two-times problem on the Sony Bravia TV is an error signal; by this blinking signal, the TV processor starts to reveal a problem with the TV's hardware or software.
Part 1: Quick Fixes for the TV Owner
- Perform a Power Cycle: Unplug the TV completely from the wall outlet and wait for a full 60 seconds to allow any residual charge to dissipate. Then, plug it back in. This simple step often resets minor internal errors.
- Check External Power Supply (AC Adapter): If your TV uses an external power brick, swap it with a known working AC adapter of the same voltage and amperage. This quickly rules out a faulty power supply unit.
- Firmware Check (Software Fix): The red light blinking 2-times problem may be due to a TV operating system or software issue. If your TV can stay on momentarily, check for the latest firmware update via the TV settings (WiFi connection required). However, software problems occur in very few Sony Bravia TVs.
- Consult a Technician: If the red light blinking 2-times problem persists after the quick fixes, the issue is hardware-related. Do not attempt self-repair. Consult a qualified LED/LCD TV technician or the authorized Sony Service Center.
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| Sony Bravia Smart TV Red Light Blinking 2-Times - Solution |
Part 2: Advanced Diagnostics & Repair for LED/LCD TV Technicians
Technician's Solution Method:
[ IC Datasheet Resource: Get the Circuit Diagram PDF of RT8295AH IC of Sony Bravia TV here. ]
The Sony TV red light blinking 2 times error is frequently triggered by a component failure leading to an Overload Protection (OLP) condition, which prevents the TV from turning on to protect the main circuits.
• SMPS Voltage Check: Use a voltmeter to measure whether the required voltage is properly output from the TV's AC adapter or SMPS circuit. Hold the red probe of the meter to the main positive supply output terminal; then switch on the TV, keep an eye on the meter screen, and see if the voltage drops during the TV starting time. If the voltage drops one or more volts, check the filter capacitors and AC rectifier diodes in the SMPS circuit.
• Protection Mode Triage: If there is a short circuit, overcurrent, overload, or low voltage input/output detected anywhere on the circuit board, the entire circuit goes into protection mode to prevent component damage. When in protection mode, the red light blinks two times as an error signal.
• If no hardware problem is found, the fault may lie in the TV's protection system control circuit. Most of that protection circuit's components are inside the processor, and outside the processor is a resistive voltage divider circuit with two resistors connected in series.
A reference voltage (19.5V) is applied to one side of the series resistor, ground to the other, and a divider voltage is output from the middle; this divided voltage acts as a protection sense for the processor.
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| Sony Bravia Android TV Red Light Blinking Two Times |
Repairing the Sony Bravia 2-Times Blinking Error via the Protection Pin
To check if the two resistors in the voltage divider circuit are damaged, find out where those two resistors are located on the board. The two series resistors located near the protection terminal of the MT5566GQVT measure 19.5 volts on one side, which is the voltage divider circuit.
The figure shows a test point near R1, where I measured 19.5 volts with the meter. So, R1 and R2 are both voltage divider circuits. However, the values R1 and R2 are not written in it.
Ohm's Law Calculation (MT5566GQVT Protection Pin)
When the MT5566GQVT processor receives 2.31 volts and draws a current of 0.209 milliamps at its protection terminal, we can calculate the required resistance using Ohm’s Law, which states: Resistance = Voltage ÷ Current.
$$R_{Total} = 19.5 V \div 0.209 mA$$ $$R_{Total} = 93.30 K\Omega$$
To deliver 2.31 volts to the protection pin from a 19.5-volt power source, the appropriate resistor values are R1 = 82 kilo-ohms and R2 = 11 kilo-ohms.
If you want to quickly verify the resistor values (R1 and R2) required to safely supply the 2.31V to the MT5566GQVT Protection Pin from the 19.5V supply, you can use a dedicated online calculator. For precise and instant verification using the Voltage Divider Formula, use our professional voltage divider tool here: Voltage Divider Calculator.
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| Voltage divider circuit for Sony Bravia MT5566GQVT |
Repair Step: To fix the Sony Bravia TV red light blinking 2-times problem, if the resistors are damaged, replace them with an 82KΩ (R1) and an 11KΩ (R2) resistor in series. Connect the Vout of this divider circuit to the protection pin of the MT5566GQVT Processor.
This repair procedure is highly technical. For a visual understanding, please watch the video guide below.
(Red Light Blinks 6 Times Problem Solution - [Sony Bravia TV] - Click Here )
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