black triangle on early model trinitron

[Reubensupernerd]

When I play my older video games on my ~1987 sony trinitron (which works fine for N64 games and most TV channels) in the top right corner there is a sliver of screen space that doesn't display anything. Interestingly enough, this sliver seems to deform the picture in that area (its as if the picture is pushed in from the corner where the sliver is). I've not checked whether this happens on other TV's but I doubt my super nintendo or NES are flawed. Is this normal? Can it be fixed?
Thanks, Reuben

[tom61]

It is fairly normal, most likely some caps have leaked or dried out and need replaced. Very common on arcade monitors, and they sell 'cap kits' for specific monitors to fix issues like these. Though probably not your consumer TV, but you might check repair parts vendors just in case.

[Reubensupernerd]

Thanks, I'll look into getting that fixed.

[dragonhead]

yep both of our late-90s trinitrons did the same exact thing. upper left corner "sagging" a little.

also, youre better off hitting the local pawn or thrift shop for a new TV, dont bother fixing it. a newer trinitron can be had used for about $30.

[Haunted360]

My Sony Trinitron (2003 I think) has a low pressure issue.

When cold (turning it on after 12 hours of being off), the brightness is way to low.
After 10 minutes, it 'heats up' and goes back to normal brightness.

Something inside the tube itself... I cant be bothered to attempt to fix it. And CRT's are a little to dangerous

[dragonhead]

mine has had its own fair share of issues lately. high static buildup. loud pops and clicks when you first turn it on, and the video image seems to shimmy a bit now, and i see moire lines.

[Haunted360]

Sounds like a bad capacitor.

[jaqiefox]

actually, with a couple precautions CRTs are not that dangerous to work with / work on. just unplugging, and then shorting the metal clip behind the flyback "plunger" cover to the crt frame with a couple large screwdrivers (making great care not to touch any metal including on the screwdrivers when you do this!) and after that flash if there is one, youre prettymuch safe to work on it till the next time you plug it in.... microwaves aren't quite so safe to work on, mainly because the amount of power (not just higher voltage, higher amperage) stored in the caps is... enough to melt some smaller screwdrivers in some models...