I had one of there a few years ago. I also used an IDE SSD and dropped right in.
Hopefully your power supply is OK, as these can be difficult to repair. Mine actually had a dead CPU from a stuck fan. It had an AMD board in it.
Overall I HATED the scope, as you need a mouse at minimum to access it's extended functions. It's capable, but NOT for complex analog waveforms. No "intensity gradient" which I MUST have.
I was honestly glad to sell it. It was loud, sucked a lot of power and useless without a mouse and keyboard, kinda. This infinivision series was from an odd, transitional time of digital scopes. Even a modern Rigol will crush it, except in raw speed, which most of us don't need.
But if it was cheap or free, it's always a scope!