Problems w/Sankyo "Big Powerful Fever"

[daverob]

The Big Powerful Fever sometimes works after it's warmed up, if that helps anyone with electrical diagnosis.

In cases like this using a hairdryer to gently warm the board until it starts working, then blasting individual components with a burst of freezer spray can help track down where a problem lies. Also a few gentle taps on the circuit board with the handle of an insulated screwdriver can locate loose connections or dry solder joints (which can also start and stop working dependant on temperature).

In my days working in a TV repair shop and with arcade monitors, I've repaired quite a few cases of frame collapse (white line across the screen), and I'd agree with JohnD0406 that there can be quite a few reasons why the fault occurs.

Also have to state the obligatory warning with CRT monitors. Parts of the monitors use significantly high voltages (1000s of volts) and they can hold a nasty shock even hours/days after the monitor has been switched off. Please be extra careful when working on them, and if you don't know what you are doing, then it's probably a job best left for the professionals.