there is a diagram, that TV is a case, the LEDs burn again, the source delivers 20 volts, you have to limit the current of the source so that it delivers you 18 volts
note that it has several sources, at the bottom of the diagram look for the source code that matches yours
http://ledeletronica.com.br/downloads/esquemas/tv/philips/Manual_servico_TV-PHILIPS_chassis-TPM14-1L-LA.pdf
limit the current by taking out these 3 resistors

proba strip by strip with this
http://tv.yoreparo.com/plasma_lcd/1680917.html?p=5833971#5833971
luck