Hello, i recently bought a TRS-80 CoCo model 1 (the gray one) with some cartridges for a very good price, but I've no image on screen and when I do an analogic channel searching my TV can't find anything so I guess it doesn't get any signal from the TRS-80. The TRS-80's power supply does a sound when it's connected to the power (even when the power button it not on "ON"). When it's on "ON" the sound is still there but become different, I don't know if it's something normal or not. I checked the motherboard and power supply and everything seems to be OK at first sight, any melted capacitors or anything. Also something that seems weird is the hook up cable. I don't know if it's normal but the part that hook up in the TRS-80 output don't fit very well and move easily.
Here is the part i'm talking about : https://drive.google.com/file/d/0B3qrqUNdYbREbUJCSnhyNE8xMUk/view?usp=sharing I also don't get why the core here is in plastic ... And here is the part i hook up to the antenna input of my TV :
https://drive.google.com/file/d/0B3qrqUNdYbRER09yUERmV1JHeEU/view?usp=sharing This cable doesn't seems to be the same as the Atari, Sega, etc ... one. The one i use for my Atari doesn't fit in the TRS-80 output. Also, i saw on the internet something about a "channel select 4-3" switch on the back of the TRS-80 Color, but i don't have that on my unit. I just have a stickers with "Channel 36" wrote on it and a kind of potentiometer under it.
Does someone have a clue about how to fix it
Thanks .