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Vectrex shows image with sound then flashes off, any help greatly appreciated!


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Hi all,

Would welcome some help if I'm posting in the right place.

I purchased a vectrex from eBay with no picture but had sound. I'm not really tech savvy but tested the voltages across the on/off switch and realised one line had no continuity, so I used some circuit cleaner to clean the switch and now I have a picture when I turn it on with sound.

It can take several attempts of turning on and off before I get that humming sound and a picture appears, I presume it needs to warm up?

If I do get a picture it rarely stys on and flashes off with what looks like a streak of lightning across the screen.

If it does stay on it gets to the player select screen and then flashes and resets once I hit a controller button.


I have some experience with soldering and recapping in game gears and other consoles but no experience on such a dated system.

Any help, advice or a point in the right direction would be greatly appreciated as I havnt been able to come across this specific problem in my research.


Thanks all!




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  • 3 weeks later...


Did you happen to read through this topic?:



First thing I had it fully recapped


Then we found out that I had a dead diode in my unit which was cutting the power off...


after replacing it everything returned back to operational state.


Cheers and good luck!

Edited by sprazzi
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