Powers on for only a few seconds

Reset the lamp timer by holding power and menu button down for 25 secnnds

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colour wheel issues and defective lamp replacing lamp and light engine color wheel cos its worn out

the kill switch is open ensure the lamp cover presses firmly on the kill switch when u close the lamp chamber door the red light will stop blinking and u can now turn the tv on

green green is power on, normal
then it tries to light the lamp, but it can't so the protection circuit comes activated.
you get red and green blinking

Then it goes to standby, red and off.

so something has happened to the lamp, or lamp ballast power supply.
Take the lamp out and check if all is OK with the 2 terminals in the connector, and the leads to the lamp are intact.

Failing that, I would suspect the ballast lamp power unit

Replace the new lamp, Green few seconds indicator blinks and then red indicator blinks

Hi,
Symptom shows Lamp is weak in result and causing restart of TV again and again. Your TV requires new lamp as per following part number...
A1085447A* LAMP BLOCK ASSY XL-2200U
It is available in Sony Accessories Store for $200 and replacement procedure is written in instruction manual of TV.

Always buy Sony original lamp for TV and avoid aftermarket / cheap lamp for TV safety.

Thats great, Please rate solution.

Does red light blink? if yes, please count blinks as there would be pause of 3 seconds between blinks and let me know to help you out.

Refer to owners manual ! Blinking indicates the type of fault that is occuring on all your tv sets. example : power light on red - indicator light beside it green but blinks rapidly for half a second rapidly then shuts off. This refers to a faulty lamp or a lamp that is near its expiration. Read your manuals if indicators refer to easy repair sweet, but if it says call tech then bummer...

What are the labels on the lights? Timer/Lamp/Service and what color is wich?