Tv will not stay on for more than about 5 seconds

Unplug the TV power cord from the power outlet. Unplug any connected devices (DVD, Set-top boxes, etc...) Press and hold the TV power button for five seconds. Plug the TV power cord back into the power outlet and turn on the TV.

IMPORTANT: Different TVs may have different ways of performing the reset procedure. Refer to the Owners Manual CHAPTER 5: SETTING UP YOUR TV > RESET FACTORY DEFAULTS OR CHAPTER 6: BASIC FEATURES > RESETTING TO FACTORY DEFAULTS for your specific TV.

• Turn off the TV and unplug the TV power cord. Leave unplugged for at least one minute. Plug it in again to complete this reset process.
• When the TV has powered on, access the settings through the MENU button, perform the following reset procedure.

Whether your TV has Wi-Fi capabilities will dictate the steps to perform the second reset procedure. This procedure will reset all settings and channels to their factory default values.
Non Wi-Fi TVs Use one of the following procedures below to reset the TV.

Procedure 1

• Press the MENU button on the remote (or MENU on the TV) to open the Setup menu.
• Using the arrow keys on the remote (or volume / channel on the TV), highlight INSTALLATION at the top of the menu and press ENTER. A new set of INSTALLATION menu icons will appear.
• Highlight the SYSTEM STATUS menu at the top.
• Highlight SYSTEM INFORMATION below and press ENTER.
• At the top of the SYSTEM INFORMATION window, use the arrow keys on the remote (or volume / channel on the TV) to scroll Left/Right through the menu bar to select FACTORY DEFAULTS. Press ENTER.
• Highlight YES and press ENTER. To cancel the reset process, select NO and press ENTER.

NOTE: If a PIN code has been set, enter your PIN code. Select DONE and press ENTER.

• A warning message will appear, select YES and press ENTER. The TV will turn off automatically after a few seconds.
• After the TV turns off, unplug the TV power cord and then plug it in again to complete the reset process.

Procedure 2

• Press the SETUP button.
• Select Installation > Reset TV.
• Enter your PIN code (if a PIN code has been set). A confirmatiom screen appears.
• Select Yes, and then press the OK button. The TV will turn off automatically.

Wi-Fi TVs (Smart, Cloud)

Procedure 1

• Press the MENU button on the remote (or MENU on the TV) to open the Setup menu.
• Using the arrow keys on the remote (or volume / channel on the TV), select SETTINGS > SETUP > RESET TV and press ENTER.

NOTE: If a PIN code has been set, enter your PIN code. Select DONE and press ENTER.

• A confirmation screen appears. Select YES, and press ENTER. To cancel the reset process, select NO and press ENTER. The TV will turn off automatically to complete the reset process.

Procedure 2

• Press the SETUP button.
• Select Installation > Reset TV.
• Enter your PIN code (if a PIN code has been set). A confirmatiom screen appears.
• Select Yes, and then press the OK button. The TV will turn off automatically.

Do a Power Reset.
1. Turn off TV.
2. Unplug the power cord of the TV from the electrical outlet.
3. Let the TV remain without power for 60 seconds.
4. Plug the power cord back into the electrical outlet. (If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.)
5. Turn on the TV.
If issue persists after doing the steps, reset the TV to factory default settings.
1. Turn on the TV.
2. Using the supplied remote, press and hold the UP arrow button.
3. While holding the UP arrow button press the POWER button on the TV itself.
4. When the TV goes off, release the POWER and UP arrow button.
5. The TV will turn on by itself and the initial setup screen will be displayed. Just follow the on-screen prompts to finish the setup.
Sony KDL 46V5100 random shut off 15 20 sec

Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Need to know how many times the led is blinking.

Try this link for more information

Re: tv kdl-55ex620 red light blink 8 times Do a Power Reset. 1. While the TV is off, unplug the power cord of the TV from the electrical outlet. 2. Let the TV remain without power for 60 seconds. 3. Plug the power cord back into the electrical outlet. (If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.) 4. Turn on the TV. 5. When the TV powers on and a picture is displayed, reset the TV to factory default settings.

• If the Reset message does not appear and the TV turns off and on, begin again from step 5.

• If the standby light begins blinking eight times, return to step 1.

6. After the Reset message appears, allow the TV to reset. Do not press any buttons on the remote control or on the TV and do not make any other adjustments for 1 minute. 7. Unplug the power cord from the electrical outlet. 8. Allow the TV to remain without power for 10 seconds. 9. Plug the power cord back into the electrical outlet. 10. Turn on the TV.

• The initial setup screen displays if the above procedures were performed correctly.

11. Follow the on-screen instructions to complete the initial set up. 12. Perform a system software (firmware) update.

Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter

Unplug the TV for some time (usually 1hr is plenty) and it should reset to factory settings.

Power supply board is dying not giving the tv correct voltage anymore.The power supply board,that the board power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Resetting the TV
If the buttons on the remote AND the buttons on the TV case do not work (channels do not change and you cannot open or navigate the menu), the TV has stopped responding. Reset the TV as follows:

NOTE:
Some TVs have a reset button. If available and accessible, try using the reset buttons before using the steps below. Using the reset buttons can save time.
1. Unplug the TV power cord from the power outlet.
2. Unplug any connected devices (DVD, Set-top boxes, etc...)
3. Press and hold the TV power button for five seconds.
4. Plug the TV power cord back into the power outlet and turn on the TV.
5. Open the on-screen menu to confirm that the TV is responding again.
6. Turn off the TV and reconnect the devices.
7. Turn on the TV.
If ever resetting is no effect then the problem is in the "DM board"

Hope it may help you;

Regards;
VOTIT

It seems that Your TV set may have a problem with its power supply circuit, the problem is intermitent bring it to the repair shop.