Zenith Television Big screen

replace the convergence amps and any blown resistors or pico fuse on the board. this is a common problem of rear projection sets this repair is not for the amateur have it done by a pro. the cost of the repair may be around $ 350.00. if you so choose to do the repair yourself, look for the two large ICs on a large heat sink (stk392-xxx).repalce them use heat sink compound on the new ICs and check the resistors around the ICs with a DVOM and check any pico fuses for open.