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your have problem with the system IC's which store the channel and all the control in the TV or it can be remedy by soldering the pin of the IC's if the problem persist well your have to replace that system.
I have provided the remote codes for your Zenith TV. I have also provided a link with instructions on how to program the remote to the TV. I hope this helps.
Dead, led flashing red/green at first, then going to red standby
Replace C604 (1000uF, 16v) elec. cap. It is in the decoupling circuit for the 5 volt supply
Reverts to standby from switch on via TV or Video
No 5v rail because FET MTP3055 o/c. (BUZ71 will do nicely)
Goes straight to standby, after a quick burst of power
Replaced R952 (39K), had gone slightly high
Disconnect the front control board and see if that stops the scrolling. If it does, check all of the small tact switches or the remote sensor. If that does not help, you might have a shorted microprocessor IC.
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