CRT has two color spots when connected via composite

chipsnblip

again, more info about your setup would be helpful (and maybe a picture, too). help us help you :)

post your /boot/config.txt as well

akafox

are you asking me for a picture or the OP?

edmaul69

@akafox he is asking the op.

MrJordaaany

Unfortunately your CRT may be slowly dying. I built my arcade using a CRT and retropie a couple of years ago now. I get discoloration that comes and goes in emulationstation, but also games. I know it's not the Pi though as it happens with my PS1 plugged into it too.

It didn't used to happen, and started slowly, but now happen quite a bit. Sometimes it just needs to warm up properly and it goes away when playing games.

If you let it sit in emulationstation (so on a static image) it gets quite bad. Once the picture starts moving again, it gets better but then sometimes comes back.

I ended up buying a new, better quality brand CRT as a backup to replace the current one with should it ever completely die.

kruuth

@mrjordaaany

I would think that as well but you can almost set your watch by it. Also, it doesn't happen on my Genesis, SNES, NES, PSX, or PS2. This only happens in EmulationStation. If I switch to actual emulation, I don't have an issue.

MrJordaaany

@kruuth Watch closely in games. I used to think the same thing. It's hard to spot with a more vibrant moving image.

I first started noticing it in-game on pokemon pinball ruby and sapphire. Since the whole play-field is either red or blue, I could see when the colours would start to wash out on a certain part of the screen. Most other games and emulators its fine, or if its happening then the minor wash-out in colours is harder to notice.

I'm pretty sure (but can do some re-testing) that it happened when my ps1 was connected, so not retropie.

We could have completely separate issues, my CRT could really be dying, and yours might just be playing up with retropie. But the issues sound pretty similar.

Its either retropie somehow, or our CRTs are on the way out. Will be cool to find out exactly which!

kruuth

Here's what it looks like from my screen. Note. This ONLY happens in emulation station. I had it at the command prompt for over an hour and never saw this.

Note the green hue over "OTHER SETTINGS"

If I keep this on it gets worse.

MrJordaaany

@kruuth Yeah this is basically what my TV does. It does happen in game too though, but its harder to notice and it comes and goes.

akafox

Mine does the same thing. I have the EXACT TV..and an older Panasonic as well. This is normal. I Don't know how to explain it..but the phosphors in/on the tube are starting to burn in slowly (VERY SLOWLY) thus why we had screen savers back in the 80's and early 90's. You can find that on modern TVs as well..just harder to spot. I had a web page describing the problem but I can NOT find it. :(

Newer TVs are just SVGA monitors with a TV tuner slapped on them in a sense. There was a lot of complaints in the 90's that a computer monitor looked better than a TV so the TV manufactures cashed in. (Although Europeans had a better set up for the start!)

You can't leave the screen unattended very long with the picture static. Thus Emulation Station..or say pac-man or donkey kong. I also know that some TVs back in the 90's had a "game"setting it lowered the contrast. Thus it kept the screen from being burnt to easily. Game systems are to "bright" you could say.

on your sanyo go to your menu and look for the "game" setting. This will help but will not "save" your TV

game setting on modern TVs reduces lag i.e. controller inputs because the tv is doing alot more than just "showing and image" like old TVs did. When you use that on newer LCDs ect. it turns all the post processing crap off and then the 'input lag" magically disappears. Not just with the pi but with the nintendo switch as well.

MrJordaaany

@akafox This makes alot of sense. As I suspected, the TV is just slowly on it's way out.

And yeah, its more likely to appear when sitting on a static image. Therefore keep it moving with a game running!

CRT's are a dying breed unfortunately :(