You press the power button and nothing happens. The screen stays black, but the little standby light on the bottom bezel blinks red in a steady rhythm: a few flashes, a pause, then the exact same count again. That count is the TV talking to you. Sony builds a self-diagnosis routine into Bravia sets, and when the set refuses to start, the number of red blinks per cycle points at which subsystem tripped the protection circuit.
I've seen plenty of these come back to life with a proper reset, and plenty more that were done for. Here's how to tell the difference without paying a tech to tell you.
First, count the blinks
Watch the light through two or three full cycles and count the flashes between pauses. Sony sets blink anywhere from 2 to 8 times. Write the number down. If you end up calling Sony support or a repair shop, that count is the first thing they'll ask for, and it saves a diagnostic fee if you already have it.
Try this first: a real power reset
Half of these calls end here, so do it properly.
- Unplug the TV from the wall. Not the power strip switch, the actual plug. Leave it unplugged for a full 60 seconds. Two minutes doesn't hurt.
- While it's unplugged, press and hold the power button on the TV itself (not the remote) for about 30 seconds. This drains whatever charge is left in the power supply capacitors.
- Plug it straight into a wall outlet. Skip the power strip for this test. A tired strip or a brownout-prone outlet can starve the power supply and trip protection.
- Try powering on from the button on the TV, not the remote, so a dead remote can't confuse the picture.
If the set boots, you're probably fine. If it blinked because of a one-off power glitch or a botched firmware update, a hard reset clears it and it may never come back.
Disconnect everything and try again
A shorted USB stick, a misbehaving HDMI device, or a faulty powered accessory can stop a Bravia from completing startup. Pull every HDMI cable, USB drive, and antenna lead so the TV is connected to nothing but the wall. Repeat the reset. If it starts clean, reconnect devices one at a time until you find the guilty one. Cheap USB drives left in the service port are a repeat offender.
What the blink counts generally mean
Sony doesn't publish one universal table, and the exact meaning shifts between chassis generations, so treat these as the common pattern rather than gospel for your model:
- 2 to 3 blinks usually point at the power board or power supply circuit.
- 4 to 5 blinks tend to involve the main board, an LED driver, or protection tripping from overheating.
- 6 blinks is the classic backlight failure signal on a lot of Bravia sets.
The honest takeaway: any blink code that survives a full power reset means hardware, not settings. No menu option fixes a blinking standby light, because the TV never gets far enough to load a menu.
The flashlight test for a dead backlight
If you suspect backlight failure, turn the TV "on" so it attempts to start, then shine a bright flashlight at the screen from a few inches away at an angle. Look closely. If you can make out a faint, ghostly image behind the glass, the panel and main board are alive and the backlight is dead. That's a repairable fault, and on a larger set it can be worth doing.
Repair or replace
Rough rule from years of watching people make this call: a power board swap on a set you like is worth it, since boards are a fairly cheap part and the labor is quick. Backlight repair on a 65-inch or larger set can still beat replacement. A main board failure on a budget TV usually isn't worth the invoice. Check your purchase date first, because Sony's standard one-year warranty (and many credit cards' extended coverage) makes this someone else's problem if you're inside the window.
One last thing. If this TV has killed a power board before, look at what it's plugged into. Recurring supply failures in the same outlet are a power-quality problem, not bad luck.