My tv toshiba md13p1 combo tv is not working. when

That buzz sound most probably are from axed horizontal output transistor. If your tv is a CRT type. Some other reason for that are faulty regulator, and diode on flyback side, or the expensive one is the flyback itself.

If age is the reason transistor can be replaced as soon maybe thirty minutes. Please get a quote and estimate first to calculate if new tv is more ideal than having it repaired.