When i press power nothing happens except the standby light just blinks and doesnt stop.

In short; you have replace everything except its display panel and speaker. Replace them too.

Its power supply I will tell you how to fix you need to get few things first

The power supply regulator board to your TV is now working fine, and has no problems at all, as, there is standby light. Check all the other voltages comes out from the power board, to main board. If all of it found OK, the fault should be at its main board.
About blinking of standby/power light;
These blinks (flashes) are fault indication. By the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside the TV. Count the blinks occur at one time switch ON, carefully. Do it once again, and make sure about the number of blinks. If the flashes are continious, non-stop, the main system control IC should be suspected. If you wish to get more details, check the site linked here. It has blinking codes detail to many brand TVs. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Did your previously had it hooked up through hdmi????? Are you getting sound????? Try with the standby light on pushing in the power button and holding it until you hear a beep or two then let go....wait a few 10-15 seconds and see what happens....

In standby mode (red led on/after the led stops from blinking), press "Display", "5", Volume (-)", "Power on" on the remote control in sequence, self diagnostic screen will be display, let me know the what is on the screen to diagnose where the fault came from.

After decorating I plugged my tv back in and it wont come on. Tried pressing the standby button but nothing happens even the remote cant get it on

try rebuilding the database and the file system in recovery consol

to get to the recovery consol press and hold the power button when ps3 is in standby mode(red light) till you hear a double beep. sometimes the ps3 does a beep then another beep and goes back into standby thsi is fine just release the power and quikly press and hold it again till you get double beep.

like on my 80g system it goes like this

ps3 standby...press hold power.......beep .........beep........stanby again....release and hold power again.......beep .........double beep...release power now you should be in recovery menu.

make sure tv not in standby mode

what i would do is crack into the tv and watch the individual parts being careful not to unplug anything while you take the back panel off.....turn it on and see what happens. let me know what happens