philips 30pw911d/37 that keeps blowing fuses

i had this tv for 5 years it would't tune on i put a new fuse it . i like know how
to find the short,

You need to substitute a current source for the fuse. An incandescent lamp acts like a current source.
Almost any bulb will do, but if the fuse is 3A, a 100W bulb substituted for this fuse will pass a max of 0.8A. Then the TV circuitry will be somewhat energized and you can find out where the current is going.
If the light is lit and then greatly dims, the short has been cleared.

Or you could get a 3A circuit breaker from an appliance parts store, like from a garbage disposal, and use this to troubleshoot.

I'd start with the horizontal flyback transformer circuitry. The heat-sinked transistor may be shorted.
Next, I'd look at large value capacitors.

Note that the cost of parts for non-trade personnel is adjusted so high that you will be on the fence as to whether you should repair or replace this set. If you can get specs on the part you can get it elsewhere for 10% to 1% of what price the manu wants.

If the TV costs $300 and the part costs $60, you should only try to fix it if the chance of you succeeding is more than 60/300 = 1 out of 5.

http://www.matelectronics.com/acatalog/ Mat_Electronics_Parts_Kits__MAT____Replacement_118.html

i agree with thatguy matelectronic sale complete repair kits for many models including replacement zenith system 3 boards.

Lew, rest me only to say:


welcome to the forum

Forgot to mention:
components fail from causes within themselves, or from another component that is overstressing them (the root cause).
If you don't fix the root cause, if there is one, the new component will soon fail.