Tv is in stanby mode. when i turn on power it seems like it wants to start but nothing comes up on screen. stanby light is blinking

TV is broken,count the blinks,that is the service code

Seem like you need a battery

Thats an error code how many times does the light blink?

For the KDSR60XBR1, 5 blinks, pause, 5 blinks, etc. means "Lamp driver error" and the probable cause listed is "Lamp driver is faulty".

You may purchase the lamp driver (power supply block), part number 146893612, for $161.86 at http://servicesales.sel.sony.com/web/productSearch.do. Use the Part or Accessory Number to look it up."

I would assume the power board has a problem. A tech could possibly repair it without replacing the whole board.

that is a common problem with this rca's check the convergence board for a short circuit
more likely is a transistor or an convergence ic

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when TV overheats white lines come across the screen

Led blinking Three times means B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672. If you have electronic knowledge you may be able to fix it. Let me know if I could help you further.
Hope this helps.

If ti blinks three times, then it may be an issue with the flyback transformer. It's called "three strikes"...it tries three times to come on, and after that enters a safety shutdown mode to protect the TV. Might need to have a professional shop take a look at it.