Hi,
You can use a weak solution of sodium hydroxide (Caustic Soda).
The water/caustic mix depends on the strength of the sodium hydroxide you buy.
I use an Oven type cleaner called KLEENOFF, mix about one teaspoon per pint of warm water.
works for me.
Hi,
If you care to post the model number of the TV & the reference of the suspect diode (ie D1, D12 etc) I may be able to tell you what the device is.