Ok, so, my poor '07 Toaster died a few days ago =( No gray screen on boot, nothing but a tiny flicker line at power on. From what i read here, it looks like one of the S-RAM chips finally went, which would explain the random crashes if the cart connector wasn't seated jusssst right; or maybe using a gen-1 Everdrive N8 since 2013 finally did it in with the voltage differences or something... i don't know. I don't have the equipment or the experience to deal with that, so i'm not going to bother for a while... anyway...
I just picked up an '08 Toaster yesterday. Plugged it in, uh-oh, wavy lines everywhere. Yuck! It has this exact problem! Both RF and Composite are affected about the same, as far as i can tell.
The first thing i tried was a different power adapter. I plugged it in with a One-Spot 9V Adapter meant for guitar pedals... It alleviates the issue! Nice! However, i wouldn't call it "fixed" by any means.
With NES-002 Power Adapter directly captured. Yuck! It moves a ton and looks even worse on CRT, trust me.
With One-Spot 9V guitar pedal adapter. Better! The movement is minimal, the interference is dimmer, but, it is still an issue.
So, if you are looking for a "quick fix", the 9V guitar pedal adapter is 20 bucks, fits in the jack, and seems to help a ton.
https://www.guitarcenter.com/Truetone/1 ... 5035973.gc
I also tried moving the '08 board to the '07 chassis, as an on/off switch issue was suggested as a culprit in this thread. Alas, that had no effect.
Now, my old dead '07 had crystal clear video output (as far as composite goes) with the same NES-002 adapter that causes interference on the '08 i just bought. The RF / Power box in the '07 is a Mitsumi. The '08 i just bought has an Alps RF / Power box. Hmm... It could just be the capacitors i suppose, but, I wonder if this is an issue that affects Alps boxes...
My next step is to take the Mitsumi RF / Power box from my dead '07 and put it in my '08. If / when i do this (and i don't blow anything up) i'll post the results. Hopefully i can get my "good" video quality back!