When you switch on the set the light comes on flashes and goes of

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/

Here is a link to the manual. It states you need to replace the lamp because it has reached it end of life an over heating.
https://docs.sony.com/release/VPLAW10.pdf

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power led, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

Short circuited component/s at its main board. These blinks [flashes] are fault indication (Error Codes).From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it.This will make repair easy.These are called blinking codes. Make sure about the exact number of blinking of the standby/power led, by switching On & OFF the set, for at least two times.Count it carefully.If you wish to get some details, check the site linked here.It has details about blinking codes, and fault locating, to many popular brand TVs and other devices.Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given.

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
https://homenol.blogspot.com/
https://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, [Exclude the model number] in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

The N611 will flash 3 times as an AC heater fault. If your AC heaters are ohming out properly (48 ohms of resistance), then you have a bad power board. If the AC heaters are not showing around 48 ohms of resistance, replace the AC heater. It's going to be one of the two. Here is an article on it:

Norcold Fault Codes AC HE or On light flashing 3 times What to do

Chances are that the Interlock Safety Switch is not properly set. Remove the Lamp Door and then reinstall the door and tighten the screw. This will reset the Switch. If that does not fix the problem make sure that the Lamp is correctly seated. Beyond that you will need a trained samsung tech troubleshoot the set because it can be a bad Lamp Ballast,DMD bd,Main bd,Color Wheel. Also make sure you have the correct lamp. There is a Lamp Code sticker on the left side of the set. Match the code from the tv to the new lamp you purchased.

thereis three switches to check one is the muti function switch. the second is the headlight switch and third is the brake switch on the pedal.if not them check your ground and see if it is secured properly

Same issue here in NZ with a set.  Fixed (twice) before.  Same problem for the thirs time in 4 years. Solution  - get a Sony.