On 04/09/2016 01:21 PM, Seth Morabito wrote: > I'm fairly surprised that the 7805 regulators died, and that they > present this symptom (no horizontal scan) upon their death. I'm sure > there are other marginal components that will need to be replaced, > so the restoration is not yet complete until I'm confident I'm not > stressing the new 7805s too much.
Good job! You might check to see how much current and the input voltage of the 7805 is being fed. Too high a current or input voltage can cause the regulator to run hot. There are some remedies for that, such as replacing the regulator with a "simple switcher" type regulator module. --Chuck
