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VT-100 displaying garbled characters

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Hi VC community,

I got a VT-220 and after setting it up, I was so happy with it I also purchased a VT-100 from eBay.

However after turning it on, the display shows only garbled text:

IMG_0361.jpg

Text will randomly change upon each boot and sometimes it displays nothing. After looking inside I couldn't see anything obvious like a blown capacitor though I'm not that experienced in electronics. It could be a corrupt ROM, which would be good as I can find replacement video cards online.

Has anyone ran into something like this before? any ideas on how to fix it?
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