Hisense Roku TV Red Light Blinks 3 Times [REAL FIX]

It’s a frustrating experience when you want to watch your favorite TV show or play games on your console, only for the TV to refuse to turn on. When your Hisense Roku TV blinks three times, it’s usually because of an error linked to the power supply (PSU) board, capacitor, or LED strips. This means that the TV could be damaged.

But don’t worry; there are several fixes you could try to restore your TV to normal functioning. This article gives several user-recommended solutions for resolving the error.

1) Reset Your TV

Reboot your Hisense TV / Image: Pigtou.com

This should always be the first step to try when your TV starts displaying any “red light blinking” errors.

Plug out the TV from the wall
Wait about 60 seconds
Plug it back in
Turn the TV on and check whether the issue is resolved

2) Factory Reset Your TV

Factory reset your Hisense TV / Image: Pigtou.com

This fixes major software glitches and resets your TV to what it was when you bought it.

Look for the hole behind your TV labeled “Reset”
Find a paper clip that can fit into the hole
Push the button down for about 15 seconds
Wait for the TV to restart

3) Check the Power Supply Output Voltage and Replace the Power Supply Circuit

The common fault components of the standby voltage line supply to the mainboard are the capacitor (leakage), LDO IC, or DC-DC IC and its circuit, circuit loopholes, etc. This step requires a digital multimeter and little knowledge of electric circuits.

Using multimeter, check the PSU output voltage / Image: Pigtou.com

Use the multimeter to check whether the output voltage is 5V (if the PSU standby voltage drops to 4.5V, the TV won’t start)
If you discover the power voltage dropped to 4.5V or less, power off the TV and disconnect the cable from the mainboard
Check again to confirm whether the standby voltage is still the same or not
If it’s still the same [4.5V], this confirms that the problem is the power supply standby output drop; replace the PSU board or the electrolytic capacitor (see below)
When the PSU standby voltage connected with a loader still has an output voltage of 5V, that means the problem is the TV’s mainboard input standby voltage line, so replace the PSU board (see below)

3.1) Replace the Power Supply Board

You’ll need a new power board and a screwdriver set. Follow the steps below to properly and safely replace your TV’s internal power board.

Have the TV’s screen side resting down on a soft surface
Remove all the screws on the back panel, including those on and underneath the base
Place the screws somewhere in an organized manner so that you’ll know what screw goes in the same holes they came out of
It should be extremely easy to pull up the back panel, but if it’s not, check whether you’re missing a screw and remove it
Look for the two connection points in the PSU board (one on the upper right and the other on the upper left) and carefully disconnect them by pushing in on each of the tabs, compressing them, and shifting them out
Remove all the screws on the PSU board; there should be four around the board’s corners and two more on the power connection
Carefully shift the power board up and off
Carefully remove the new powerboard from the box and unwrap it from the packaging
Check whether the new board has the connection point that feeds to the upper right portion; if it does, go to the TV and carefully remove the connection
Gently rest the new power board in place
Grab the screws and secure the board to the aluminum panel (do your best not to cross-thread them; they should go in smoothly)
Reattach the orange connections until they secure with the outer tabs
Grab the back panel, carefully align it, and then rest it in place
Before you start attaching any screws, ensure all the screw holes are visible
Reattach all the screws around the back panel and be careful not to over-tighten them
Insert and secure the base
Attach the power cord and plug it into a power source
Turn on the TV and check whether the issue is resolved

NOTE: Before buying a new power board, ensure the part number matches what’s on your TV. Don’t use the TV’s model number.

3.2) Check and Replace Blown Capacitors

Inspect a circuit board for blown capacitors / Image: Pigtou.com

You’ll require replacement capacitors (they could be a higher voltage but not lower voltage), a soldering kit, a desoldering pump, a 20k ohm resistor, and a screwdriver set.

Turn the TV off and let it sit for about 30 minutes (to avoid the risk of electric shock) before removing the back cover
Look for the capacitors with their tops popping off (this indicates that they’re blown)
Use the screwdriver to unscrew the circuit board and remove the tabs (be careful not to touch a power cord as it might still have an electric current)
Run a 20k ohm resistor across the capacitor terminals to discharge any electric current left
Use a desoldering pump to remove the blown capacitors from the circuit board
Take the new capacitors and solder them on the spots where you removed the old ones (make sure to check the terminals of the capacitors when soldering)
Screw the circuit board back into its place
Reattach the TV’s back cover and turn it on

4) Replace Bad LED Strips

For this step, you’ll need replacement LED strips, a screwdriver set, duct tape, and suction cups. We recommend taking pictures during the repair process as a reference point and ensuring the TV is unplugged.

Remove the screws and the back cover off the TV
Disconnect the ribbon cables from the scan drive board
Pry the bezel from the chassis and remove it
Release the scan drive boards, then gently flip them up and tape them to the panel
Using suction cups, carefully lift and remove the panel from the chassis
Release and remove the filter frame around the chassis
Tape the corners on the layers of diffusion to keep them together
Remove the layers of diffusion from the chassis
Remove the tabs that hold the reflector sheet to the chassis
Lift and remove the reflector sheet
Disconnect the power cables on the LED strips and then remove the LED strips from the chassis
Take the replacement strips and align them on the chassis
Reinstall the reflector sheet and the tabs that hold it in place
Reinstall the layers of diffusion and remove the tape in the corners
Reinstall the filter frame
Reinstall the TV panel and remove the suction cups
Release the scan drive boards and realign them in the clips
Reinstall the bezel
Reconnect the T-CON board to the scan drive boards
Reinstall the back cover and the screws
Plug the TV into a power source and turn it on

5) Use Your Warranty

If your TV is new and the warranty is still valid, we advise you to contact Hisense for professional help repairing your TV or to get a replacement.

Go to their official website
Chat with the support or call +1 (888) 935-8880
Follow the instructions you’ll be given, which involve registering your TV and filling in your details
Drop off the TV at the nearest store
Wait for it to be repaired or for a replacement to be delivered to your address