Flashing red light when turned on, powers off by itself
Hi! I bought an OG xbox at my local thrift store for 20$ and when I plug it in (without the hard drive and disc drive), it turns on by itself, spins the fans and shows a red flashing light before powering off. The power button doesn't work so I turn it on using the eject button. When I turn it on with both drives plugged in, it does the same thing but stops after a second. Also, there's some weird dust/residue on the motherboard.
Edit: The dust is corrosion. Which traces should I check?
Edit 2: The presence of a DVD/HD Drive no longer affects the problem and it stopped turning off by itself. I'm keeping this post up in case the issue is not what I think it is.