Samsung TV won't turn on: the order Samsung and iFixit give

The red standby light decides the order

Samsung’s support page says a TV that won’t turn on can be hard to troubleshoot, and that in some cases it is actually on and showing a black screen. The key, it says, is the red standby light, a small red light at the edge of the TV that you aim the remote at. In normal use the light is on when the TV is off, in standby, and off when the TV is on. iFixit gives the same reading: you usually see it on when the TV is off, you do not see it when the TV is on or unplugged, and if you see it blinking it indicates a problem, generally with power supply. iFixit adds that its page applies to newer Samsung TVs, not to rear projection units or projectors.

If the light is lit, Samsung says the TV has power and the only thing left to rule out is the remote: press Power on the remote, then press the Power button on the TV itself, whose place varies by model. If the TV turns on with its own button, the remote is the problem; if it will not turn on with either while the light is lit, Samsung says service is needed. If the light is off, the TV either has no power or is on with a black screen: press any button on the TV except Power, and if anything appears the TV is on. Otherwise unplug it for 30 seconds and plug it into an outlet you know works, testing the outlet with a lamp, and ask for service if the light never comes on. If it is blinking, Samsung says to unplug it for 30 seconds, plug it into a working outlet and not a surge protector, and to treat a light that keeps blinking as a sign that something is wrong with the TV.

The reset, as three pages give it

All three pages ask for a power cycle and none of them says it the same way. Samsung’s page for the United States says to unplug the TV for 30 seconds, and the Levant page, updated on 13 October 2026, says the same, adding that if the screen stays blank with the light on you should perform a factory reset from the settings menu. iFixit says to unplug the TV for 60 seconds, then press and hold the TV’s own power button for a full 30 seconds while it is still unplugged, wait another 30 seconds and plug it back in. It describes this as a way to clear a software glitch or hung process. The pages do not say which length is the better one.

On the power path, Samsung’s page says to use an outlet you know works and, for a blinking light, not a surge protector, because it says they may eventually wear out and stop providing the voltage the TV needs. iFixit says to remove surge protectors, extension cords and power strips from the path between the outlet and the TV and plug directly into an outlet you have confirmed works, and that if the light then becomes solid the problem was one of the cables in the middle, which you can add back one by one. For a TV with an external One Connect box, the Levant page says to disconnect and reconnect the cable between the TV and the box.

The remote, the input and the HDMI device

Before anything inside the set, iFixit lists causes that are not faults. A remote can be reset by removing both batteries completely, holding its power button for 30 seconds and putting the batteries back, preferably new ones; you can check whether it sends a signal by pointing it at a phone camera and looking for a light. The TV can show a black screen and be working if its input source does not match what is connected: with HDMI 1 selected and the device in HDMI 2, you see nothing, and the power light may even blink. iFixit also says a TV shut down while connected to an Xbox, a Wii or another device through HDMI will frequently not turn on unless that device is on; turn the device on, then disconnect it once the TV is on and shut the TV down to test it. Our page on a TV remote that does not work covers the remote in more detail.

If the TV is receiving power and the light is off, iFixit says the TV may be on with a failed backlight, and gives a test: hold a flashlight close to the screen and look for a faint picture in the lit area; if it is there, the backlight has failed, which it says can be a bad power supply board feeding the backlight or the backlight components. It notes that a shorted backlight can also show as a blinking standby light.

What iFixit says about opening the TV

For a blinking light that survives all of that, iFixit says the likely cause is the power supply board, though a significant number of other causes are possible. Its tests need the back cover off, and it says opening the TV can be physically difficult and that you may not feel comfortable doing it. It tells you to unplug the power cord and every other cable first, and to be cautious around the power supply board, especially the part marked HOT, where the voltages are appreciably higher. On the board it says to look for burn marks or swollen components, especially capacitors, and for a blown fuse, which it says usually signals other failures. To test the motherboard it unplugs the cable between the power supply board and the motherboard and, with the TV plugged in and turned on, watches the backlight through the small holes in the rear plate; if it is lit, that is a general indication of a failed motherboard. We did not open a TV, and Samsung’s pages send you to service at this point.

What we did not use

We tested nothing on a TV. We did not read the iFixit answers, the Reddit thread, the JustAnswer page, the Samsung community thread, the Quora question or the third Samsung page, for Latin America, that Google listed. The Samsung page for the Levant closes with a note about which models the guide applies to that names Galaxy phones and foldables, not TVs, so we used it only where it agrees with Samsung’s page for the United States or with iFixit. The Google AI box, which opens with two questions about the standby light and the TV’s own button, was read only in part. Samsung also lists guides we did not open, among them one for a TV with no picture or a black screen and one on a TV that turns on and off by itself.