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Museum of the Game® & International Arcade Museum® Forums
I recently acquired a periscope-style Battlezone cab. It worked well with the exception of "bloom" where the image would grow and shrink while playing. To address this, I removed the HV cage and replaced the diode. I discharged the monitor with an HV probe (though it showed no charge when doing so). The diode boots were blackened and the springs were rusted up badly. I ended up soldering the HV Diode directly to the wires and covering it in marine grade heat shrink. This is the diode I used: https://www.arcadeshop.com/i/970/hv1809-hv-diode-atari-b-w-vector-monitors.htm
I also took the transistors off the side of the cage and cleaned the connectors with some DeoxIT contact cleaner.
Upon reassembly the game works (I can hear the audio and can tell the tank is moving around and such) but no visuals. Any idea what to check? What would I likely have broken/messed up to go from the working monitor to a non-working setup. I did not remove the monitor or do anything with the tube/neck. Sanity check: The diode has the band going toward the monitor/anode connector/red wire, this is correct right?
I replaced the diode a second time just in case I did something to mess up the first one, but the results are the same. What should I check next?