I have an ZX Spectrum+ that came with a SCART interface (unknown brand, all I know is that it's french and that the blue logo seems to spell "IS").
It didn't came with its original power supply so I bought a 9 Volts and 2.25 Amps power supply.
When I plug the SCART and the power supply, nothing shows up on the screen.
I don't think the computer is broken as the internal regulator gets hot (quite a lot) when the power supply is plugged (I read that it is normal for it to get really hot), and I can hear a small noise on my headsphones when plugging the power supply, as if electricity was running normally.
I also didn't notice any leaking capacitors or any corrosion on both the ZX Spectrum+ mainboard and the SCART interface printed circuit board. The only thing I did before trying to boot it was to dust off the mainbaord and keyboard.
The problem being that there is no LED (none on this model) or speaker sound that tell me that computer is booting. So I don't know if the problem comes from the computer or only the peritel interface.
The screen I currently use is an Atari SC 1425. Maybe the SCART interface is no compatible with this screen?
What could prevent my ZX Spectrum+ from showing anything on-screen? Is it that either the peritel interface or the ZX Spectrum+ are broken?