Sony bravia tv keeps switching on and off

https://www.youtube.com/watch?v=AuWhoi5--2o
It's usually because your remote batteries are low. Remotes are known to send off some weird signals when they're on the last bit of juice. Your TV could be interpreting infrared noise from your remote as an "On" command. The power button on the remote or the TV itself could be stuck. https://www.quora.com/Why-would-a-TV-turn-off-and-on-by-itself
Samsung
Try to update the software.In some cases, a software update can correct the problem. ... If the TV turns off during the software update, it could damage the TV. Updates can take up to 30 minutes depending on network speed, so if the TV is not turning off too frequently, try updating the software.
https://www.samsung.com/us/support/troubleshooting/TSG01108742/
LG:
A TV that intermittently powers on or off is usually caused by the timer setting. ... Check if the TV power cord is securely plugged into the wall outlet or the power bar. 3. Time menu options affect TVs turning on or off automatically.
https://www.lg.com/ca_en/support/product-help/CT20098005-1412238468277-intermittent-power-or-powers-off-on
SONY:
Your Sony BRAVIA KDL-46XBR9 TV may reboot due to a damaged AC power cord. In this case you can usually resolve the rebooting problem by replacing the power cord. Your Sony BRAVIA TV may also reboot because of a bad power supply in the TV. ... The BRAVIA KDL-46XBR9 may also reboot because of incorrect settings on the TV.
https://www.techwalla.com/articles/why-is-my-sony-bravia-kdl-46xbr9-rebooting

Here is a link to the service manual--

http://www.scribd.com/doc/46056922/KLV-23S200A-and-Other

Page 11 explains the error codes--unless you are a tech with a meter etc it will be a shop repair.

A lot of good info including taking set apart correctly.

"abnormal power"

SD TECH

probably the ba board for the same ahs gone bad
the same has happended to my sony v series bravia also and have to be replaced on our own csot as this si not covered under any warranyt

Hi. Sunday evening the picture on my Sony Bravia suddenly went very red and there are blurry lines after action. TypeHi. Sunday evening the picture on my Sony Bravia suddenly went very red

The Bravia would shut-off and restart after about a minute of operation repeatedly. I removed the internet connection cable and the problem stopped.

Power board have problems.Replaced capcitors puff up or burst open,Know how to solders?Or replaced the whole power board buy refurbish power board at Shopjimmy.com,Ebay.com.

Fault at its main digital 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. 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. .

I had the same problem with this model, seems to be a common problem across much of the recent sony range. For me the problem stopped when I unplugged the external aerial (not much use if you want to use freeview, but maybe some indicator of source of the prob ?)

i had prob where my sony would switch off for a few secs thenh come back on . The solution was in menu / tv settings / sleep timer . Go into that and make sure its set to off. there are opions for off , 5 min 20 min 30 min etc... mine was set to nothing just blank.

sony 40" bravia keeps turning off and red stand-by light will flash. just got please help me fix this problem