Blast City Black screen and strange noise

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elbaiken
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Blast City Black screen and strange noise

Post by elbaiken »

Hi, yesterday I got a Blast City, connected a pi2jamma to it and it worked just fine at first. I turned off the cab and when I booted it again it made a strange noise and I can hear some clicks. The screen doesn't seem to be working (I can hear videogames sounds though).



Does anybody know what would be the issue? I'm totally new to this CRT thing.

Thanks in advance,
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zak
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Re: Blast City Black screen and strange noise

Post by zak »

Chassis needs repair. I think your tube is fine. Just don't power it on again.
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nem
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Re: Blast City Black screen and strange noise

Post by nem »

zak wrote: December 8th, 2020, 2:32 pmI think your tube is fine.
There's a somewhat high likelihood the tube is toast too.

When you get your chassis back from repair, take off the back cover. If you can see blue sparking in the neck when you turn on the cab, the tube is done for. Like this:

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elbaiken
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Re: Blast City Black screen and strange noise

Post by elbaiken »

Thanks for your comments, I found a guy that repairs CRT screens, he'll take a look at the chassis then, hopefully this would get solved soon. I'll report the progress here as soon as I get my screen back
mikejmoffitt
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Re: Blast City Black screen and strange noise

Post by mikejmoffitt »

I think your tube has gone to air. The deflection can be heard because the HV circuit is separate from the rest of the monitor's power supply on the MS-293* series.
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